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• Postfix able to receive email but not able to send it

  - by c0mrade

  I had postfix running on my machine(comes with centos minimal), but today I configured it to use my domain for the sake of example this is my domain name example.com . Here is my config : alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 header_checks = regexp:/etc/postfix/header_checks html_directory = no inet_interfaces = all inet_protocols = ipv4 mail_owner = postfix mailbox_size_limit = 1073741824 mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man message_size_limit = 10485760 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = example.com myhostname = mail.example.com mynetworks = 127.0.0.0/8 mynetworks_style = host myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relayhost = smtp.$mydomain sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_banner = $myhostname ESMTP $mail_name smtpd_client_restrictions = permit_mynetworks,reject_unknown_client,permit smtpd_recipient_restrictions = permit_mynetworks,permit_auth_destination,permit_sasl_authenticated,reject unknown_local_recipient_reject_code = 550 I need one email account to be able to send emails (password retrievals etc.). I read today somewhere that if you create unix account postfix will recognize it as email address so if your account username was ant your email would be [email protected]. So I tested that and tried to send email to [email protected] and I successfully received mail. When I try to send the email with ant task script, I'm not able to connect : Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: mail.example.com, port: 25; nested exception is: java.net.ConnectException: Connection timed out: connect What am I missing here? Edit I'm able to telnet to localhost : Trying 127.0.0.1... Connected to localhost. Escape character is '^]'. 220 mail.example.com ESMTP Postfix

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• How to configure mod_proxy_balancer to gracefully fail under high load

  - by bramp

  We have a system which has one Apache instance in front of multiple tomcats. These tomcats then connect to various databases. We balance the load to the tomcat with mod_proxy_balancer. Currently we are receiving 100 requests a second, the load on the Apache server is quite low, but due to database heavy operations on the tomcats, the load there is roughly 25% (of what I estimate they can handle). In a few weeks there is an event happening and we estimate that our requests will jump significant, maybe by a factor of 10. I'm doing everything I can do reduce the load on our tomcats, but I know we are going to run out of capacity, so I would like to fail gracefully. By this I mean, instead of trying to deal with too many connections which all timeout, I would like Apache to somehow monitor average response time, and as soon as the response time to Tomcat is getting above some threshold, I would like a error page displayed. This means that users who are lucky still get a page rendered quickly, and those who are unlucky get a error page quickly. Instead of everyone waiting far too long for their page, and eventually everyone timing out, and the database being swamped with queries which are never used. Hopefully this makes sense, so I was looking for suggestions on how I could achieve this. thanks

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• Passive FTP Server Port Configuration Troubles Win2003

  - by Chris

  Win2003 Ports 20 & 21 are open IIS6 - Direct Metabase Edit enabled Configured FTP service passive range to 5500-5550 5500-5550 added to windows firewall iisreset and double checked by restarting ftp service nothing has changed, when I connect and enter passive, it still hangs when ever I try to LIST or transfer files. Active is just as useless. Microsoft Windows [Version 6.1.7600] Copyright (c) 2009 Microsoft Corporation. All rights reserved. C:\Users\user>ftp ftp> open x.x.x.x Connected to x.x.x.x. 220-Microsoft FTP Service xxxxxxxxxxxxxxxxxx 220 xxxxxxxxxxxxxxxxxx User (x.x.x.x:(none)): user 331 Password required for user. Password: 230-YOUR ACTIVITY IS BEING RECORDED TO THE FULLEST EXTENT 230 User user logged in. ftp> QUOTE PASV 227 Entering Passive Mode (82,19,25,134,21,124) ftp> ls 200 PORT command successful. 150 Opening ASCII mode data connection for file list. and it hangs.. Now I can see from microsooft documentation that on newer windows releases, additional steps such as these are suggested, but they dont work on 2003... netsh advfirewall firewall add rule name=”FTP Service” action=allow service=ftpsvc protocol=TCP dir=in netsh advfirewall set global StatefulFTP disable is there anything I am missing, what is this StatefulFTP malarkey at the end EDIT I can connect and transfer binary files using WinSCP client - Therefore the problem must be with my ftp commands no? Can anyone see anything wrong with my windows ftp client example? why would it hang on ls, i tried QUOTE LIST as well, and that just hangs, and the windows ftp client doesnt work in active, it hangs if I try to go "binary" then put - This worked before I added 5500-5550 on the router. I have since added this range to the router but no difference to the windows ftp client.

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• Postfix a lot of relay acces denied errors in maillog

  - by tester3

  I'm on Centos 6.5 with Postfix/Dovecot and some virtual domains. Postfix works fine, but I've got a lot of messages like this "NOQUEUE: reject: RCPT from 1-160-127-12.dynamic.hinet.net[1.160.127.12]: 454 4.7.1 : Relay access denied; from= to= proto=SMTP" in my maillog. I've tried to close port 25 with iptables, when I do so - I got no such messages, but my mail system starts work incorrectly and can't receive mail from other hosts. Please help! My postconf -n: alias_database = $alias_maps alias_maps = hash:/etc/postfix/aliases broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 html_directory = no inet_interfaces = all inet_protocols = ipv4 mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man message_size_limit = 20971520 mydestination = localhost.$mydomain, localhost newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES relay_domains = * sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtp_tls_cert_file = /etc/pki/tls/certs/example.com.crt smtp_tls_key_file = /etc/pki/tls/private/example.com.key smtp_tls_loglevel = 1 smtp_tls_session_cache_database = btree:/etc/postfix/smtp_tls_session_cache smtp_tls_session_cache_timeout = 3600s smtp_use_tls = yes smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = example.com smtpd_sasl_path = /var/run/dovecot/auth-client smtpd_sasl_security_options = noanonymous smtpd_sasl_tls_security_options = $smtpd_sasl_security_options smtpd_sasl_type = dovecot smtpd_tls_cert_file = /etc/pki/tls/certs/example.com.crt smtpd_tls_key_file = /etc/pki/tls/private/example.com.key smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_database = btree:/etc/postfix/smtpd_tls_session_cache smtpd_tls_session_cache_timeout = 3600s smtpd_use_tls = yes soft_bounce = yes tls_random_source = dev:/dev/urandom unknown_local_recipient_reject_code = 550 virtual_alias_maps = hash:/etc/postfix/vmail_aliases virtual_gid_maps = static:2222 virtual_mailbox_base = /var/vmail virtual_mailbox_domains = hash:/etc/postfix/vmail_domains virtual_mailbox_maps = hash:/etc/postfix/vmail_mailbox virtual_minimum_uid = 2222 virtual_transport = virtual virtual_uid_maps = static:2222 Please help! Will attach master.cf or anything other if needed.

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• SBS 2011 Essentials and too many new Mac users

  - by Harry Muscle

  We currently have about 15 users on a Windows SBS 2011 Essentials Server. I've just been informed that we plan to bring aboard about 15 more users that will be using Macs. We'll be using a Mac Server to manage the 15 new Macs, however, I'm looking for advice on how to best set this all up. Ideally I would just add the 15 new Mac users to Active Directory and setup the Mac Server to authenticate against AD, unfortunately the SBS 2011 Essentials Server has a limit of 25 users, so adding these new users to AD won't work unless we upgrade the Windows server (which I'd rather avoid since it's a lot of work and a lot of money). That leaves the option of creating user accounts for these 15 Mac users on the Mac Server only. The problem that this creates though is how do I share files been Mac users and Windows users since they are now using different systems for network authentication. Any advice (short of upgrade to SBS Standard) is highly appreciated. Thanks, Harry P.S. We don't run Exchange or anything else on our server ... it's mainly used for file sharing and enforcing security via group policies.

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• Deciphering an IIS6 Httperr log file

  - by smackaysmith

  We have a Windows 2003 R2 SP2 server with iis6 that is creating a 1024kb httperr file every minute. I can't figure out what I'm looking at. Here's a snippet: 2010-03-24 13:15:05 10.53.2.35 1667 10.53.2.12 80 HTTP/1.1 PUT /hserver.dll?&V01|&IMAC=0080646077AB|CID=32|CN=LWT0080646077AB|ED=1|IP=10.53.2.35|SM=255.255.255.0|GW=10.53.2.1|SN=10.53.2.255|DM=logs.com|1D=10.53.2.12|2D=10.101.2.12|0D=1|AL=/usr/sbin/netxserv|AV=4.1.0.0|CP=VIAüEstherüprocessorüü800MHz|CPS=800|RM=190512|B1=1.18|PD2=1024x768x16ü@ü60Hz|IM=6.6.2-02|CI=3600|SN#=6KHDG301300|OS=23|VI=1|P1=24|TZO=-301|TZ=CDT|FS=128|MD=2003-04|CO=|LO=|AP0=BaseüSystem|NA|6.6.2-02|AP1=RapportüAgent|NA|4.1.0-3.26|AP2=TrueType|NA|6.8.0-3.4|AP3=WebFonts|NA|2.0.4-3.6|AP4=TrueTypeüFonts|NA|6.8.0-3.5|AP5=Network_login|NA|1.0.0-1.0.3|AP6=ScreenüSaver|NA|3.13|AP7=DMonitor|NA|1.0.0-0.4.0|AP8=MozillaüFirefox_15|NA|1.5.0.8-3.6|AP9=RemoteüShadow|NA|3.17|AP10=RemoteüDesktop|NA|1.6.0-1.0|AP11=SNMP|NA|5.1.3.1-3.13|AP12=LinuxüPrinting|NA|3.8.27-3.33|AP13=SSH|NA|3.8.1-3.25|AP14=ThinPrint|NA|6.2.87-0.2|AP15=XDMCP|NA|6.8.0-3.29|AP16=Ericom|NA|8.2.0-3.29|AP17=Daylightüsavingütimeüupdate|NA|1.1.0-1.0.0| 411 - LengthRequired - What on earth am I looking at? Nothing in the system or app logs. Finally, in iis manager, Default Web Site label has boxes instead of spaces. Very odd.

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• Migrating from tomcat to tc server - receiving java.sql.SQLException on startup

  - by user470184

  I'm receiving below error when I start tcServer. I do not receive this error on standalone version of tomcat. Is there extra config I need to add for tcServer ? WARNING: Unexpected exception resolving reference java.sql.SQLException: Io exception: The Network Adapter could not establish the connection at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255) at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387) at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:441) at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:165) at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801) at org.apache.tomcat.jdbc.pool.PooledConnection.connectUsingDriver(PooledConnection.java:277) at org.apache.tomcat.jdbc.pool.PooledConnection.connect(PooledConnection.java:182) at org.apache.tomcat.jdbc.pool.ConnectionPool.createConnection(ConnectionPool.java:699) at org.apache.tomcat.jdbc.pool.ConnectionPool.borrowConnection(ConnectionPool.java:631) at org.apache.tomcat.jdbc.pool.ConnectionPool.init(ConnectionPool.java:485) at org.apache.tomcat.jdbc.pool.ConnectionPool.(ConnectionPool.java:143) at org.apache.tomcat.jdbc.pool.DataSourceProxy.pCreatePool(DataSourceProxy.java:116) at org.apache.tomcat.jdbc.pool.DataSourceProxy.createPool(DataSourceProxy.java:103) at org.apache.tomcat.jdbc.pool.DataSourceFactory.createDataSource(DataSourceFactory.java:539) at org.apache.tomcat.jdbc.pool.DataSourceFactory.getObjectInstance(DataSourceFactory.java:237) at org.apache.naming.factory.ResourceFactory.getObjectInstance(ResourceFactory.java:140) at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304) at org.apache.naming.NamingContext.lookup(NamingContext.java:793) at org.apache.naming.NamingContext.lookup(NamingContext.java:140) at org.apache.naming.NamingContext.lookup(NamingContext.java:781) at org.apache.naming.NamingContext.lookup(NamingContext.java:153) at org.apache.catalina.core.NamingContextListener.addResource(NamingContextListener.java:1028) at org.apache.catalina.core.NamingContextListener.createNamingContext(NamingContextListener.java:637) at org.apache.catalina.core.NamingContextListener.lifecycleEvent(NamingContextListener.java:238) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142) at org.apache.catalina.core.StandardServer.start(StandardServer.java:747) at org.apache.catalina.startup.Catalina.start(Catalina.java:595) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)

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• APC Smart UPS network shutdown issue

  - by Rob Clarke

  Here is a bit about our setup: We have 2x Smart-UPS RT 6000 XL units with network management cards We are running Powerchute from a network server Powerchute is connected to the management cards of both UPSs UPSs are set to do a graceful shutdown via Powerchute when the battery duration is under 20 minutes We also have a command file that runs with Powerchute Although our setup is redundant we do not have an equal load on each server due to APC switches for single power devices The problem is that as we do not have an equal load on each server the batteries drain at different rates. This means that the UPSs both get to the specified low battery duration at completely different times. The problem here is that UPS 1 may have run down to 5 minutes and is in desperate need of initiating a Powerchute shutdown - UPS 2 still has 25 minutes of runtime so no shutdown is initiated. Consequently UPS 1 goes down and takes all the servers with and then shuts down UPS 2 as well! What we need to happen are 1 of either 2 things: Powerchute initiates the shutdown as soon as either UPS reaches the 20 minutes low battery duration setting - and doesnt wait for both The UPS with the heavier load expends its entire battery but does not shutdown both UPSs and lets the load be switched across to the UPS that still has runtime remaining. That way when the UPS that still has runtime reaches its low battery duration it can proceed with the graceful shutdown via Powerchute. Hope that makes sense, any help is greatly appreciated!

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• Apache: How to redirect OPTIONS request with .htaccess?

  - by Milan Babuškov

  I have Apache 2.2.4 server with a lot of messages like this in the access_log: ::1 - - [15/May/2010:19:55:01 +0200] "OPTIONS * HTTP/1.0" 400 543 ::1 - - [15/May/2010:20:22:17 +0200] "OPTIONS * HTTP/1.0" 400 543 ::1 - - [15/May/2010:20:24:58 +0200] "OPTIONS * HTTP/1.0" 400 543 ::1 - - [15/May/2010:20:25:55 +0200] "OPTIONS * HTTP/1.0" 400 543 ::1 - - [15/May/2010:20:27:14 +0200] "OPTIONS * HTTP/1.0" 400 543 These are the "internal dummy connections" as explained on this page: http://wiki.apache.org/httpd/InternalDummyConnection The page also hits my main problem: "In 2.2.6 and earlier, in certain configurations, these requests may hit a heavy-weight dynamic web page and cause unnecessary load on the server. You can avoid this by using mod_rewrite to respond with a redirect when accessed with that specific User-Agent or IP address." Well, obviously I cannot use UserAgent because I minimized the server signature, but I could use IP address. However, I don't have a clue what should the RewriteCond and RewriteRule look for IPv6 address ::1. The website where this runs is using CodeIgniter, so there is already the following .htaccess in place, I just need to add to it: RewriteEngine on RewriteCond %{REQUEST_URI} ^/system.* RewriteRule ^(.*)$ /index.php?/$1 [G] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ /index.php?/$1 [L] Any idea how to write this .htaccess rule?

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• Kernel Logging disabled?

  - by Tiffany Walker

  uname -a Linux host 2.6.32-279.9.1.el6.i686 #1 SMP Tue Sep 25 20:26:47 UTC 2012 i686 i686 i386 GNU/Linux And start ups: ls /etc/init.d/ abrt-ccpp certmonger dovecot irqbalance matahari-broker mdmonitor nfs proftpd rpcbind single ypbind abrtd cgconfig functions kdump matahari-host messagebus nfslock psacct rpcgssd smartd abrt-oops cgred haldaemon killall matahari-network mysqld ntpd qpidd rpcidmapd sshd acpid cpuspeed halt ktune matahari-rpc named ntpdate quota_nld rpcsvcgssd sssd atd crond httpd lfd ma tahari-service netconsole oddjobd rdisc rsyslog sysstat auditd csf ip6tables lvm2-lvmetad matahari-sysconfig netfs portreserve restorecond sandbox tuned autofs cups iptables lvm2-monitor matahari-sysconfig-console network postfix rngd saslauthd udev-post But when I installed CSF/LFD I am getting nothing. LFD does not create lfd.log and nor are any blocks being logged in /var/log/messages either from the firewall. This is not natural. I looked for klogd but maybe I am looking in the wrong place for it to see if it is enabled? ls /etc/init.d/syslog ls: cannot access /etc/init.d/syslog: No such file or directory Also noticed no syslog? Also noticed this: csf -d 84.113.21.201 Adding 84.113.21.201 to csf.deny and iptables DROP... iptables: No chain/target/match by that name. iptables: No chain/target/match by that name. I've never seen this before and this is a dedicated box. Also: ./csftest.pl Testing ip_tables/iptable_filter...OK Testing ipt_LOG...OK Testing ipt_multiport/xt_multiport...OK Testing ipt_REJECT...OK Testing ipt_state/xt_state...OK Testing ipt_limit/xt_limit...OK Testing ipt_recent...OK Testing xt_connlimit...OK Testing ipt_owner/xt_owner...OK Testing iptable_nat/ipt_REDIRECT...OK Testing iptable_nat/ipt_DNAT...OK RESULT: csf should function on this server iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• Spammer relaying via Postfix mail server

  - by Paddington

  I have a Plesk 9.5 mail server (cm.snowbarre.co.za) on Ubuntu 8.04 LTS which forwards all SMTP traffic to an anti-spam server cacti.snowbarre.co.za. Many times I see the headers on the anti-spam server to contain from addresses not hosted on the mail server and I have checked and confirmed that my server is not an open relay server. How can a spammer be using my server to relay spam traffic? How can I stop this? Open relay test: paddington@paddington-MS-7387:~$ telnet cm 25 Trying 196.201.x.x... Connected to cm. Escape character is '^]'. 220 cm.snowbarre.co.za ESMTP Postfix (Ubuntu) mail from:[email protected] 250 2.1.0 Ok rcpt:[email protected] 221 2.7.0 Error: I can break rules, too. Goodbye. Connection closed by foreign host. paddington@paddington-MS-7387:~$ A typical headers is: *Received from cm.snowbarre.co.za (cm.snowbarre.co.za[196.201.x.x]) by cacti.snowbarre.co.za (Postfix) with ESMTPS id 00B601881AD; Mon, 27 Aug 2012 14:03:29 +0200 (SAST) Received from cm.snowbarre.co.za (localhost [127.0.0.1]) by cm.snowbarre.co.za (Postfix) with ESMTP id 81627367E007; Mon, 27 Aug 2012 14:02:50 +0200 (SAST) Received from User (ml82.128.x.x.multilinksg.com [82.128.x.x]) by cm.snowbarre.co.za (Postfix) with ESMTP; Mon, 27 Aug 2012 14:02:49 +0200 (SAST) Reply-To <[email protected]> From "Ms Nkeuri Aguiyi"<[email protected]> Subject Your Unpaid Fund. Date Mon, 27 Aug 2012 05:03:22 -0700 MIME-Version 1.0 Content-Type text/html; charset="Windows-1251" Content-Transfer-Encoding 7bit X-Priority 3 X-MSMail-Priority Normal X-Mailer Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE Produced By Microsoft MimeOLE V6.00.2600.0000 X-Antivirus avast! (VPS 120821-0, 08/21/2012), Outbound message X-Antivirus-Status Clean Message-Id <[email protected]> To undisclosed-recipients:;*

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• Windows Task Scheduler fails at sending e-mail

  - by Marki

  The error is 2147746321. I can see in the mailserver log that it tries, but the connection gets closed. Wed 2012-10-10 15:55:25: Session 990590; child 1 Wed 2012-10-10 15:55:25: Accepting SMTP connection from [x:49161] to [y:25] Wed 2012-10-10 15:55:25: --> 220 Mdaemon; Wed, 10 Oct 2012 15:55:25 +0200 Wed 2012-10-10 15:55:25: <-- EHLO x Wed 2012-10-10 15:55:25: --> 250-Hello x, pleased to meet you Wed 2012-10-10 15:55:25: --> 250-VRFY Wed 2012-10-10 15:55:25: --> 250-EXPN Wed 2012-10-10 15:55:25: --> 250-ETRN Wed 2012-10-10 15:55:25: --> 250-AUTH LOGIN Wed 2012-10-10 15:55:25: --> 250-8BITMIME Wed 2012-10-10 15:55:25: --> 250 SIZE 20971000 Wed 2012-10-10 15:55:25: <-- AUTH LOGIN Wed 2012-10-10 15:55:25: --> 334 VX...... Wed 2012-10-10 15:55:25: Connection closed Wed 2012-10-10 15:55:25: SMTP session terminated (Bytes in/out: 26/212) Googling does not reveal much except that it indeed "doesn't work" and Exchange pops up all over the place. This is no Exchange server. I just want a plain and straight SMTP connection to work. How? (I have tried running the task as normal user and as system account, no difference.)

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• Adding new SPNs to existing service ids

  - by jmh

  We have a tomcat server using spring-security kerberos to authenticate users to the webpage against active directory. There are around 25 domain controllers. The site has two CNAME based DNS aliases. The site currently has one Service ID with SPNs registered for the DNS A record as well as each of the CNAMEs. While everything is working right now, I don't know how to reliably change this configuration without possible downtime. The reason is that clients cache kerberos tickets: http://www.juniper.net/techpubs/en_US/uac4.2/topics/concept/user-role-active-directory-about.html The 'kerbtray.exe' program is helpful for viewing and deleting Kerberos tickets on the endpoint. Old tickets must be purged from the endpoint if SPNs are updated or passwords are changed (assuming the endpoint still has a cached copy of the ticket from a prior SPNEGO request to the MAG Series device. During testing, you should purge tickets before each authentication request. Description of "klist" program used to inspect/delete cached tickets: http://technet.microsoft.com/en-us/library/hh134826.aspx So if each of the clients (users running windows) who connect to my web server have kerberos tickets that become invalid as soon as I update the SPNs or passwords, how do I ensure changes are seamless? Are there any operations that can be done safely? I can't just ask all of the users to install klist and delete their old tickets.

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• Access 2007: How can I make this EXPRESSION less complex?

  - by Mike

  Access is telling me that my new expression is to complex. It used to work when we had 10 service levels, but now we have 19! Great! My expression is checking the COST of our services in the [PriceCharged] field and then assigning the appropriate HOURS [Servicelevel] when I perform a calculation to work out how much REVENUE each colleague has made when working for a client. The [EstimatedTime] field stores the actual hours each colleague has worked. [EstimatedTime]/[ServiceLevel]*[PriceCharged] Great. Below is the breakdown of my COST to HOURS expression. I've put them on different lines to make it easier to read - please do not be put off by the length of this post, it's all the same info in the end. Many thanks,Mike ServiceLevel: IIf([pricecharged]=100(COST),6(HOURS), IIf([pricecharged]=200 Or [pricecharged]=210,12.5, IIf([pricecharged]=300,19, IIf([pricecharged]=400 Or [pricecharged]=410,25, IIf([pricecharged]=500,31, IIf([pricecharged]=600,37.5, IIf([pricecharged]=700,43, IIf([pricecharged]=800 Or [pricecharged]=810,50, IIf([pricecharged]=900,56, IIf([pricecharged]=1000,62.5, IIf([pricecharged]=1100,69, IIf([pricecharged]=1200 Or [pricecharged]=1210,75, IIf([pricecharged]=1300 Or [pricecharged]=1310,100, IIf([pricecharged]=1400,125, IIf([pricecharged]=1500,150, IIf([pricecharged]=1600,175, IIf([pricecharged]=1700,200, IIf([pricecharged]=1800,225, IIf([pricecharged]=1900,250,0)))))))))))))))))))

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• why sendmail resolves to ISP domain?

  - by digital illusion

  I wish to setup a local mail server for debugging purposes using fedora 15 I set up sendmail, but there is a problem. When I'm not connected to the internet, the local mail server delivers correctly (to localhost). And in /var/log/mail I see that I correctly delivered a mail to [email protected]: Jun 21 18:24:56 PowersourceII sendmail[6019]: p5LGOttt006019: [email protected], size=328, class=0, nrcpts=1, msgid=<[email protected]>, relay=adriano@localhost Jun 21 18:24:56 PowersourceII sendmail[6020]: p5LGOuSV006020: from=<[email protected]>, size=506, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=PowersourceII.localdomain [127.0.0.1] Jun 21 18:24:56 PowersourceII sendmail[6019]: p5LGOttt006019: [email protected], [email protected] (500/500), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30328, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p5LGOuSV006020 Message accepted for delivery) When I connect, networkmanager fills in /etc/resolv.conf with: domain fastwebnet.it search fastwebnet.it localdomain nameserver 62.101.93.101 nameserver 83.103.25.250 Now sendmail does not work any longer and tries to send messages to my ISP domain, as seen in the log: Jun 21 18:40:02 PowersourceII sendmail[6348]: p5LGe1LV006348: [email protected], [email protected] (500/500), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=30327, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p5LGe10n006352 Message accepted for delivery) Jun 21 18:40:02 PowersourceII sendmail[6354]: p5LGe10n006352: to=<[email protected]>, delay=00:00:01, xdelay=00:00:00, mailer=esmtp, pri=120651, relay=mx3.fastwebnet.it. [85.18.95.21], dsn=5.1.1, stat=User unknown As you can see, it tries to deliver a mail to [email protected], and fails The setup is working under other ISPs. How can I avoid the fastweb ISP DNS relay? Thank you

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• guest crash on long backup via rsync

  - by ToreTrygg

  I recently upgraded host to Ubuntu 9.10 with vmware server 2.0.2, i had two guest machine. One is a sme server i had several crash during a session of backup with rsync to another pc. Normal activities run regularly. The other guest is up without problem since 25 days. I found in the log a lot o f row like these Dec 20 05:29:27.445: vcpu-1| VLANCE: Ethernet0 skipped 2560 time(s) Dec 20 05:29:27.445: vcpu-1| VLANCE: 66 12 5 8 2 3 3 0 1 0 0 1 0 1 2 0 Dec 20 05:29:27.445: vcpu-1| VLANCE: 0 0 1 0 1 0 0 0 1 0 0 0 0 1 0 2452 Dec 20 05:29:27.651: vmx| ide0:0: Command WRITE(10) took 1.947 seconds (ok) Dec 20 05:29:37.945: vmx| ide0:0: Command WRITE(10) took 1.033 seconds (ok) when the vitual machine crash the log report, I paste here only some part to limit the lenght of the message Dec 27 01:48:05.686: Worker#2| Caught signal 6 -- tid 700 Dec 27 01:48:05.686: Worker#2| SIGNAL: eip 0x460422 esp 0xb124c024 ebp 0xb124c03 Dec 27 01:48:05.712: Worker#2| SymBacktrace12 00000000 eip 0x39d7ee in function clone in object /lib/tls/i686/cmov/libc.so.6 loaded at 0x2d1000 Dec 27 01:48:05.719: Worker#2| Unexpected signal: 6. Dec 27 01:48:05.720: Worker#2| Core dump limit is 0 KB. Dec 27 01:48:05.762: Worker#2| Child process 10455 failed to dump core (status 0 x6). Dec 27 01:48:05.762: Worker#2|SymBacktrace13 00000000 eip 0x39d7ee in function clone in object /lib/tls/i686/cmov/libc.so.6 loaded at 0x2d1000 Dec 27 01:48:05.779: Worker#2|Msg_Post: Error Dec 27 01:48:05.780: Worker#2|http://msg.log.error.unrecoverable VMware Server unrecoverable error: (Worker#2) Dec 27 01:48:05.780: Worker#2|Unexpected signal: 6. I have no idea how to solve the problem with this installation, I think to dowgrade the host to a version more compatible with vmware server 2. I read a lot of post about difficult of installation I think the problem of compilation during install could be related to my problem. Excuse me if the post isn't very clear, it's my first post here. Any help or suggest will be appreciated. Thanks

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• Network tools not working with a 3G connection

  - by gAMBOOKa

  Some of my network tools stopped working after I switched to a 3G connection from a DSL one. Cain and Abel's sniffer, Metasploit, even the NMAP scanner. I'm using Windows 7. The 3G device in question is the Huawei E180. Here's the error I get when running NMAP WARNING: Using raw sockets because ppp2 is not an ethernet device. This probably won't work on Windows. pcap_open_live(ppp2, 100, 0, 2) FAILED. Reported error: Error opening adapter: The system cannot find the device specified. (20). Will wait 5 seconds then retry. pcap_open_live(ppp2, 100, 0, 2) FAILED. Reported error: Error opening adapter: The system cannot find the device specified. (20). Will wait 25 seconds then retry. Call to pcap_open_live(ppp2, 100, 0, 2) failed three times. Reported error: Error opening adapter: The system cannot find the device specified. (20) Metasploit's refused connection to my websites too.

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• internet-based sync software that will keep running after Windows Live Sync stops doing PC-to-PC-syncs?

  - by Warren P

  According to the wikipedia page, Microsoft Live Sync will shortly stop offering the PC-to-PC sync service. There are lots of apps to sync two PCs on the same LAN, but I want to sync two PCs that are in different cities, across the internet, traversing two different NATs, and that requires some kind of service running in the internet that both connect into. There is already a few questions about syncing folders and files, but this is not a duplicate because none of them answer this basic question: Microsoft Live Sync works better than RSYNC, or any of the linked SYNC solutions in any of the "not really duplicates" because it works even when the two PCs have NAT and firewalls between them that forbid direct connectivity, because Windows Live Sync has a free always-on internet server that all the client PCs connect into. I'm looking for a FREE (no-fees) Microsoft Live Sync work-alike PC-to-PC sync solution that works between PCs and Macs, at least, as well as between PCs, and works behind NAT and firewalls at least as well as Microsoft's solution. (Note that Microsoft's solution makes only outbound socket calls to a microsoft server, so this solution must necessarily include a server-hub component that is hosted publically on a free site and which does not require that I set up and manage and pay for my own public internet hosting site) Hint: None of the answers in the linked duplicate are equivalent (PureSync,FreeFileSync,BestSync 2010,SyncButler,Comodo BackUp,QuickShadow,Gbridge) in that none of them work for the PC to Mac situation, where firewalls and nats prevent direct connection, or else they require money to be paid. When Microsoft Live Sync / Live Mesh finally kills direct PC-to-PC mode, the limitation will be that you will have to pay for more than 25 GB of cloud service, and you can then only sync PC #1 to PC #2 if you first sync to the cloud, then down to other clients. I can currently sync 100 gb of data from one computer to another, only temporarily "moving the data" through Microsoft's data servers without using up my Skydrive storage quota.

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• Unable to send mail to hotmail from rackspace cloud

  - by Jo Erlang

  I'm having issue sending mail from postfix on a rackspace cloud instance for my domain. Hotmail says "550 SC-001 (SNT0-MC4-F35) Unfortunately, messages from 198.101.x.x weren't sent. Please contact your Internet service provider since part of their network is on our block list. " Here is the mail log Sep 20 08:02:59 mydomain postfix/smtpd[1810]: disconnect from localhost[127.0.0.1] Sep 20 08:02:59 mydomain postfix/smtp[1814]: 59CFF4B191: to=<[email protected]>, relay=mx3.hotmail.com[65.55.92.184]:25, delay=0.19, delays=0.1/0.01/0.06/0.01, dsn=5.0.0, status=bounced (host mx3.hotmail.com[65.55.92.184] said: 550 SC-001 (SNT0-MC4-F35) Unfortunately, messages from 198.101.x.x weren't sent. Please contact your Internet service provider since part of their network is on our block list. You can also refer your provider to http://mail.live.com/mail/troubleshooting.aspx#errors. (in reply to MAIL FROM command)) Sep 20 08:02:59 mydomain postfix/smtp[1814]: 59CFF4B191: lost connection with mx3.hotmail.com[65.55.92.184] while sending RCPT TO I have implemented rDNS, SPF and DKIM they all are looking fine. I have checked my IP and domain, on most of the spam black lists and it is listed as ok on those, (not listed as spamming IP) What should I try next?

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• SSL Returning Blank Page, No Catalina Errors

  - by Mr.Peabody

  This is my second, maybe third, time configuring SSL with Tomcat. Earlier I had created a self signed, which worked, and now using my signed is proving fruitless. I am using Tomcat, operating from the Amazon Linux API. When using the signed cert/keystore, my server is starting normally without errors. However, when trying to navigate to the domain it is giving me an "ERR_SSL_VERSION_OR_CIPHER_MISMATCH" error. My server.xml file looks as follows: <Connector port="8443" maxHttpHeaderSize="8192" maxThreads="150" minSpareThreads="25" maxSpareThreads="75" enableLookups="false" disableUploadTimeout="true" acceptCount="100" scheme="https" secure="true" SSLEnabled="true" clientAuth="false" sslProtocol="TLS" keystoreFile="/home/ec2-user/.keystore/starchild.jks" keystorePass="d6b5385812252f180b961aa3630df504" /> It couldn't hurt to also mention that I'm using a wildcard certificate. Please let me know if anything looks amiss! EDIT: After looking more into this, I've determined there may be nothing is wrong with the Server.xml, or the listening ports. This is becoming more of an actual certificate error, as the curl request is giving me this error: curl: (35) Unknown SSL protocol error in connection to jira.mywebsite.com:-9824 Though, I can't seem to figure out what the "-9824" is. When comparing this curl to another similar setup (using the same Wildcard Certificate) it's turning up the full handshake, which is to be expected. I believe this is now between the protocol/cypher set default on JIRA servers.

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• Xmodmap fails to remap modifier keys

  - by ZyX

  When I try to move keys, so that I have CapsLock on escape, Control on CapsLock and Escape on left control, I get the following error: % xmodmap ~/.Xmodmap X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 118 (X_SetModifierMapping) Value in failed request: 0x17 Serial number of failed request: 15 Current serial number in output stream: 15 That is the code that fails: remove Lock = Caps_Lock ! ESC keycode 9 = Caps_Lock add Lock = Caps_Lock remove Control = Control_L ! CapsLock keycode 66 = Control_L add control = Control_L ! Control_R keycode 37 = Escape ! 2*Meta_L keycode 148 = Meta_L add mod1 = Meta_L If I comment out all lines that start with either add or remove it runs without any errors, but does not do what I want. Program versions (Gentoo x86 (stable)): xorg-server-1.7.6 xmodmap-1.0.4 xf86-input-evdev-2.3.2 Xorg.conf: # nvidia-xconfig: X configuration file generated by nvidia-xconfig # nvidia-xconfig: version 1.0 (buildmeister@builder63) Fri Aug 14 17:54:58 PDT 2009 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" InputDevice "Evdev Keyboard" "CoreKeyboard" InputDevice "Evdev Mouse" "CorePointer" EndSection Section "Module" Disable "dri" Disable "dri2" Disable "record" EndSection Section "InputDevice" Identifier "Evdev Keyboard" Driver "evdev" Option "Device" "/dev/input/event2" Option "CoreKeyboard" Option "AutoRepeat" "500 25" Option "XkbRules" "xorg" Option "xkb_rules" "xorg" Option "XkbModel" "yahoo" Option "xkb_model" "yahoo" Option "XkbLayout" "dvp2" # ,ru2 Option "xkb_layout" "dvp2" # ,ru2 # Option "XkbVariant" "" # ,winkeys Option "XkbOption" "grp_led:scroll,grp:rctrl_toggle,compose:rwin,grp:lwin_switch" # grp:lwin_switch EndSection Section "InputDevice" Identifier "Evdev Mouse" Driver "evdev" Option "CorePointer" Option "Device" "/dev/input/event3" Option "Name" "Genius Ergo Mouse" Option "HWHEELRelativeAxisButtons" "7 6" Option "WHEELRelativeAxizButtons" "4 5" Option "SendCoreEvents" "true" Option "Buttons" "11" EndSection Section "Files" FontPath "/usr/share/fonts/misc" FontPath "/usr/share/fonts/Type1" FontPath "/usr/share/fonts/100dpi" FontPath "/usr/share/fonts/75dpi" FontPath "/usr/share/fonts/terminus" # FontPath "/usr/share/fonts/intlfonts" FontPath "/usr/share/fonts/ttf-bitstream-vera" # FontPath "/usr/share/fonts/ttf" FontPath "/usr/share/fonts/corefonts" FontPath "/usr/share/fonts/paratype" EndSection Section "Monitor" Identifier "Monitor0" VendorName "Unknown" ModelName "Unknown" HorizSync 28.0 - 33.0 VertRefresh 43.0 - 72.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 SubSection "Display" Depth 24 EndSubSection EndSection Section "Extensions" Option "Composite" "Disable" EndSection Section "ServerFlags" # Option "XkbDisable" "false" # Option "AutoAddDevices" "false" Option "DontVTSwitch" "false" Option "DontZap" "false" # Option "DontZoom" "true" EndSection Everything worked before update.

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• Ubuntu 12.04 - HP ProLiant DL380 G4 - Load Maxes Out / Unresponsive

  - by Brian S

  Trying to post this question on here. I've posted it on the Ubuntu forums as well with no replies. Recently I upgraded an HP ProLiant DL380 G4 server from Ubuntu 10.04 server to Ubuntu 12.04 server. Upon doing so, the server will not - at random times - get to a load of 400+ and then become completely non-responsive. I use an SNMP graphing program (cacti) and the load steadily increases by about 10 every five minutes until it gets over 400 and the graphing stops. The graphs may not be accurate, but the CPU load averages about 3% before this happens - and right when the load starts increasing, it jumps to about 25% for 15 minutes and dramatically dips down to less than 1% (about 0.3%) until the graphing stops. I'm not able to open a SSH tunnel to the server to do anything. I've checked the /var/log/syslog and all logging stops at that time as well - with nothing else in there. The odd thing is - the server still responds to DNS queries for the zones it is authoritative on during this time - and at normal speed. Just not sure what the next step would be in order to find out what is going on - and how this issue can be corrected. The server cannot stay with Ubuntu 10.04 Server and needs to stay upgraded.

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• Typical outbound port list for guest access?

  - by Steve

  I manage a weekly rental house that includes wireless Internet access. I've allowed all outbound ports on my router but my ISP has disabled my Internet access twice now because guests have downloaded (or served up) copyrighted content. So I'd like to institute some port filtering to discourage p2p sharing (see disclaimer below). But I don't want to inconvenience the 99.9% of folks who keep things above-board. My question is, what outbound ports are typically open for rental/hotel wireless Internet access, or where can I find such a list? TCP 80,443,25,110 at a minimum. Though my own email service uses 995 and 465 for SSL, some may use IMAP, I personally use SSH and FTP, so I'll open those. Roughly I figure I need to open access to privileged ports, and close 1024 & above. Is there a whitelist I should institute for commonly used high ports? And does it make sense to block UDP 1024 ? Disclaimer: I realize anyone replying to this message could circumvent the port filtering and share content to their heart's content. I do not need comprehensive p2p blocking, which requires more than a port whitelist. Anyone staying at the house shoulders the responsibility for their Internet use, per the rental contract. Also anyone savvy enough to circumvent the port filters would hopefully be savvy enough to use some sort of peer blocking, thereby preventing the ISP from taking down the service.

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• Why won't this script accept any arguments?

  - by Nate Wagar

  I'm trying to write an SVN post-commit hook and, strangely, am getting hung up on what should be the easiest part. The Script: set REPO="$1" set REV="$2" set SVNBIN="/opt/CollabNet_Subversion/bin/" set SSHBIN="/usr/bin/ssh" set HOST="staging.domain.net" set timeout=30 set USERNAME="svn-usr" set E_NO_CONNECT=2 set E_WRONG_PASS=3 set E_UNKOWN=25 set CHANGED=`"$SVNBIN"svnlook changed --revision $REV $REPOS` echo "Here are changes: $CHANGED" >> /var/svn/repos/www/logs/testing echo "Command: $0; Repo: $REPO; Rev: $REV; Total: $#" >> /var/svn/repos/www/logs/testing set PROJECT "" Yet when I call it, it doesn't seem to be seeing the arguments I pass to it: /var/svn/repos/www/logs> sudo ../hooks/post-commit /var/svn/repos/www 33 svnlook: missing argument: --revision Type 'svnlook help' for usage. /var/svn/repos/www/logs> cat testing Here are changes: Command: ../hooks/post-commit; Repo: ; Rev: ; Total: 1 This is on a Solaris 10 SPARC box. I'm a bit of a script newbie, but shouldn't this be really easy??

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• Multiple threads stuck on Tomcat behind Apache mod_proxy

  - by Eddy

  we just took a break at butting our collective heads against this maddening problem we're having. Basically this brand new deployment of Tomcat 6.0.36 crawls down to a halt every couple minutes with many of the worker threads stuck as in the example snippet; only after a while the server gets "unstuck" for another couple minutes. The previous Tomcat works a charm though, but keeping it is not really an option... On netstat, we also see a lot of FIN_WAIT and FIN2_WAIT. "catalina-exec-25" daemon prio=10 tid=0x000000004f9d4000 nid=0x7459 runnable [0x0000000044567000] java.lang.Thread.State: RUNNABLE at java.net.SocketOutputStream.socketWrite0(Native Method) at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:92) at java.net.SocketOutputStream.write(SocketOutputStream.java:136) at org.apache.coyote.http11.InternalOutputBuffer.realWriteBytes(InternalOutputBuffer.java:756) at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:448) at org.apache.tomcat.util.buf.ByteChunk.append(ByteChunk.java:363) at org.apache.coyote.http11.InternalOutputBuffer$OutputStreamOutputBuffer.doWrite(InternalOutputBuffer.java:780) at org.apache.coyote.http11.filters.IdentityOutputFilter.doWrite(IdentityOutputFilter.java:118) at org.apache.coyote.http11.InternalOutputBuffer.doWrite(InternalOutputBuffer.java:593) at org.apache.coyote.Response.doWrite(Response.java:560) at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:364) at org.apache.tomcat.util.buf.ByteChunk.flushBuffer(ByteChunk.java:448) at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:318) at org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:274) at org.apache.catalina.connector.Response.finishResponse(Response.java:493) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:317) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:396) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Any idea? Eddy

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