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• Exchange Online SMTP Not Working With Any Email Client

  - by emre nevayeshirazi

  I am trying to switch our company mail server to exchange online. I have successfully added my domain and users and can send and receive mails through Outlook Web App. I can also send and receive if I configure my Outlook 2013 client using Exchange protocol. However, some folks in company are using Thunderbird and some old Outlook Clients. For those, I tried to connect to Exchange via IMAP/SMTP. This is what I use, For incoming, IMAP / Port : 993 with SSL / Host : outlook.office365.com For outgoing, SMTP / Port : 589 with TSL / Host : smtp.office365.com I can receive emails, however I could not be able to send emails. I keep getting An error occurred while sending mail. The mail server responded: 4.3.2 Service not active. Please verify that your email address is correct in your Mail preferences and try again. My username and password are correct, I am using my mail address as my username to mailbox. I also tried sending mail via C# application which was working for outlook.com and gmail.com SMTP settings. It also fails to send emails and returns the same error code. I thought TB and other old clients such as Office 2003 might not support Exc. Online so I tried same settings in Office 2013. It successfully connected my mailbox when checking for configuration but failed in sending test message and returned the same error code. Configuration for incoming and outgoing mailbox are taken from here. They are also available on Office 365 user page and they are same. What could be the reason for error ?

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• Laptop will not boot

  - by WillumMaguire

  This is a dell studio 1558 laptop. Now, something is wrong with the charger that it won't charge the laptop, but the laptop can turn on and operate properly as long as it is attached. It has been like this for a while, but it's not the problem. My problem is that as of yesterday, It takes several minutes to get past the "dell" startup logo (where is says "f2 setup" and "f12 boot options"). After it gets past, it beeps as normal to tell me about the charger and gives me the f2/f12 options and f1 to continue as normal. I can press f12 to get into boot options and load into my live USB BackTrack 5 ISO, but after "startx" it just stays at a black screen. I can also access BIOS setup, but see nothing that would help the problem. When I boot to the HDD, it gives me this Intel UNDI, PXE-2.1 (build 083) Realktek PCIe GBE Family Controller Series V.2.29 (06/30/09) PXE-E61: Media test failure, check cable PXE-M0F: Exiting PXE ROM Operating System not found Also, pressing f8 gives me the same results as booting as normal. It is running Windows 7 Ultimate, dual-core Intel i3 @ 2.27ghz and 4gb RAM. I think there is an issue with the HDD, as the "Operating System not found" would lead me to believe. Is this a fixable problem?

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• Comparing Nginx+PHP-FPM to Apache-mod_php

  - by Rushi

  I'm running Drupal and trying to figure out the best stack to serve it. Apache + mod_php or Nginx + PHP-FPM I used ApacheBench (ab) and Siege to test both setups and I'm seeing Apache performing better. This surprises me a little bit since I've heard a lot of good things about Nginx + PHP-FPM. My current Nginx setup is something that is a bit out of the box, and the same goes for PHP-FPM What optimizations I can make to speed up the Nginx + PHP-FPM combo over Apache and mo_php ? In my tests using ab, Apache is outperforming Nginx significantly (higher requets/second and finishing tests much faster) I've googled around a bit, but since I've never using Nginx, PHP-FPM or FastCGI, I don't exactly know where to start PHP v5.2.13, Drupal v6, latest PHP-FPM and Nginx compiled from source. Apache v2.0.63 ApacheBench Nginx + PHP-FPM Server Software: nginx/0.7.67 Server Hostname: test2.com Server Port: 80 Concurrency Level: 25 ---> Time taken for tests: 158.510008 seconds Complete requests: 1000 Failed requests: 0 Write errors: 0 ---> Requests per second: 6.31 [#/sec] (mean) Time per request: 3962.750 [ms] (mean) Time per request: 158.510 [ms] (mean, across all concurrent requests) Transfer rate: 181.38 [Kbytes/sec] received ApacheBench Apache using mod_php Server Software: Apache/2.0.63 Server Hostname: test1.com Server Port: 80 Concurrency Level: 25 --> Time taken for tests: 63.556663 seconds Complete requests: 1000 Failed requests: 0 Write errors: 0 --> Requests per second: 15.73 [#/sec] (mean) Time per request: 1588.917 [ms] (mean) Time per request: 63.557 [ms] (mean, across all concurrent requests) Transfer rate: 103.94 [Kbytes/sec] received

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• Are applications optimized for XenApp?

  - by damitamit

  Our IT dept are about to deploy virtualized apps using Citrix XenApp. One of these apps will be Dynamics AX 4.0 SP2, a ERP client (which I develop on). They have supposedly reached a roadblock because an external 'Dynamics AX Consultant' has told our IT Dept that Dynamics 4 will not work optimally on Citrix and will run very slow because it is not optimized for Citrix. We have it running in a Test environment now and seems ok. They have been told that the only 'solution' is to upgrade to Dynamics AX 2009 where supposedly this problem as been fixed. (not a small task for my team!) When I heard about this, I was quite surprised. From my brief knowledge of Citrix, I thought it would be application independent. How does the citrix app virtualization work, in that a particular app would work better than others on citrix? Would the speed of the virtualized app not just depend on the resources/network connection the citrix server has? FYI, Dynamics AX is a 3-tier client/server system, so the client will be accessing a AOS application server, which then accesses the database. Please enlighten me :)

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• Can I have 2Gbit over 1Gbit Nics

  - by Daniel

  So this really baffles me. Apparently because 1Gbit can transmit data in both directions simultaneously it should be possible to get 2Gbit of data transfer on a single NIC (1Gbit flow seend and 1Gbit receive). People claim that because 1Gbit is full-duplex (almost always) it is exactly 2Gbit in total. My intuition and electrical background tells me that something is not right here 4 twisted pairs 250Mbit capacity each gives 1Gbit. Unless it is really possible to transfer data in both directions simultaneously. I did a test with iperf. Ubuntu server 12.04 <-- MacBook Pro. Both with decent CPU speed. Tested speed of connection individually and on Mac I can see 112MB/s regardless which direction data is going. On Ubuntu with vnstat and ifstat I got 970Mbit speeds. Now, launching iperf in server mode on both machines at the same time and sending data using 2 iperf clients shows that I'm for example on Ubuntu box sending at 600Mbit, and receiving 350Mbit. which adds up to pretty much 1Gbit link. So to me there is no magical 2Gbit. Can someone confirm that or tell why I'm wrong? Another thing that confuses me i the fact that e.g. 24-port switch has for example: Throughput»up»to:»50.6Mpps Switching»capacity:»68Gbps Switch»fabric»speed:»88Gbps Which would suggest thay can handle 2GBit per port.

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• Email bouncing sent from Google

  - by davidmck

  I'm hoping someone here has an idea of where to look next. We have a domain we support which has email sent to it from one particular user bounce with the following message: Delivery to the following recipient failed permanently: [email protected] Technical details of permanent failure: Google tried to deliver your message, but it was rejected by the recipient domain. We recommend contacting the other email provider for further information about the cause of this error. The error that the other server returned was: 550 550 Unrouteable address (state 14). We only have reports of bouncing form this one particular user (who is someone we don't support - except they'd like to be able to contact our customer and we're trying to figure out if the problem is on our end). Many people can successfully send to this domain and the user who is getting bounce messages can send to other domains that we support (so it's clearly something specific with the princetonscoop.com domain and not our setup in general). I've reviewed the MX records multiple times and the server logs don't show a connection which generates this error (in fact this error is not one that our mail server would ever return). So it appears that google is contacting a different mail server for some reason. I have tested sending from my gmail account and that works. I believe the sender is using a google-apps account (the account they are using is from their own domain, not a gmail account). Any ideas on what might be happening here or what to test/investigate next? Thanks.

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• graphics performance better on battery?

  - by Scott Beeson

  Anyone have any idea why my laptop would perform (considerably) better while on battery than while plugged in? It's a Dell Latitude E6420 with Windows 8 Pro. I tried mirroring all the settings in the selected power plan from "On battery" to "Plugged In" and that didn't help. I then just restored the defaults for all power plans (balanced and high performance). I'm still seeing the same results. The best example where it is most noticeable (don't laugh) is Sim City Social in Chrome. I'm probably seeing a performance increase of 5x on battery versus plugged in. This is easily reproducible too. I'm very confused. Could it be caused by dust? The laptop isn't that old and there is no visible dust. I'm not going to take it apart to check the insides as it's a corporate laptop. Could it be overheating? Battery Sim City Social: 68 degrees max Civ V: 77 degrees max Charger Sim City Social: 68 Civ V: did not test See answer below... I'm retarded

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• Can't make Dovecot communicate with Postfix using SASL (warning: SASL: Connect to private/auth failed: No such file or directory)

  - by Fred Rocha

  Solved. I will leave this as a reference to other people, as I have seen this error reported often enough on line. I had to change the path smtpd_sasl_path = private/auth in my /etc/postfix/main.cf to relative, instead of absolute. This is because in Debian Postfix runs chrooted (and how does this affect the path structure?! Anyone?) -- I am trying to get Dovecot to communicate with Postfix for SMTP support via SASL. the master plan is to be able to host multiple e-mail accounts on my (Debian Lenny 64 bits) server, using virtual users. Whenever I test my current configuration, by running telnet server-IP smtp I get the following error on mail.log warning: SASL: Connect to /var/spool/postfix/private/auth failed: No such file or directory Now, Dovecot is supposed to create the auth socket file, yet it doesn't. I have given the right privileges to the directory private, and even tried creating a auth file manually. The output of postconf -a is cyrus dovecot Am I correct in assuming from this that the package was compiled with SASL support? My dovecot.conf also holds client { path = /var/spool/postfix/private/auth mode = 0660 user = postfix group = postfix } I have tried every solution out there, and am pretty much desperate after a full day of struggling with the issue. Can anybody help me, pretty please?

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• My email server is being blocked by Yahoo: TS03 Message permanently deferred.

  - by bilygates

  Hello, My mail server has been getting the following error from Yahoo's mail servers since about a month: postfix/smtp[23791]: host g.mx.mail.yahoo.com[98.137.54.238] refused to talk to me: 421 4.7.1 [TS03] All messages from [my ip] will be permanently deferred; Retrying will NOT succeed. See http:// postmaster.yahoo.com/421-ts03.html I have exchanged about 4 emails with Yahoo's support team. The first three seemed like automated messages, and the 4th told me that there is nothing they can do, but if I change my policies I can send them another email in 6 months. They also told me: However, based on the information you have provided us, we cannot systematically deliver your email to the Inbox at this time. We suggest that you ask your users to set up a filter in Yahoo! Mail to ensure that they get your email messages in their Inbox. The problem is that my email doesn't even get to their Spam folder. The server won't allow any connections. I have never sent spam messages, not even newsletters. I only send emails for my new users so they can activate their account. I've also implemented DKIM and told Yahoo about this. I have checked my configuration with http://www.myiptest.com/staticpages/index.php/DomainKeys-DKIM-SPF-Validator-test and it reports that both SPF and DKIM are set up correctly. What should I do? Basically, I'm losing new users every day. Any help will be appreciated. P.S.: I apologize if this particular question has already been asked. I searched for it but didn't find it.

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• Debugging Samba/CUPS printer sharing with Windows

  - by mrdrbob

  I've got a HP Deskjet hooked up to a Slackware 12.2 box. I've got CUPS set up and can print a test page from the box just fine. I've also got Samba set up and have a couple file shares that work fine. I'm trying to share that HP Deskjet out via Samba, but I can't get it to show up in any Windows system. I see the server and its file shares in Windows networking, but when I open the Printers, no printer shows up. Running net view \\servername from the command line lists the file shares, but no printers. Here's the pertinent part of my smb.conf, if that helps: [global] workgroup = HOMENET security = share hosts allow = 192.168.1. 192.168.2. 127. load printers = yes printcap name = cups printing = cups log file = /var/log/samba.%m max log size = 50 [printers] comment = All Printers path = /var/spool/samba browseable = no public = yes writable = no printable = yes guest only = yes Can anyone give me some pointers as to where to start looking for potential causes? Update: Running testparm shows no errors. Here's the output (minus the file shares): [global] workgroup = HOMENET security = SHARE log file = /var/log/samba.%m max log size = 50 printcap name = cups hosts allow = 192.168.1., 192.168.2., 127. [printers] comment = All Printers path = /var/spool/samba guest only = Yes guest ok = Yes printable = Yes browseable = No

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• Webserver optimization

  - by f-aminov

  Hi guys! I have a website hosted on a VPS (512Mb - minimum guranteed memory, 510Mhz proccessor, Debian 5.0 Lenny, Apache 2.2.9 with nginx 0.7.65 as a frontend to serve static content, MySQL 5.1.44, PHP 5.3.2 with APC caching). I'm a web developer, so I'm not very good at optimizing servers, but I've managed to install and setup all those neccessary components (LAMP, nginx, etc.). After that I decided to stress test my website (which uses Drupal 6.16 with caching and all possible optimization enabled) using a utility called "Webserver Stress Tool 7". And it seems to me that the results aren't any good - here is a graph (sorry, as a new user I'm not allowed to post images) As you can see the response time depending on amount of simultaneous users increases very quickly. With 10 simultaneous users the time is about 1000ms, with 100 simultaneous users it's about 15000ms (15s!). The question is do you think this is normal behavior for such a server or something is wrong with the settings and optimization? If you think something is wrong what particulary could be wrong? Any other suggestion how to speed this a little bit up?

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• Internet slowed down because of SQUID Server setup

  - by Ranjith Kumar

  Recently I have setup a squid server for our office. I have computer (A) with two ethernet cards, one for internet and the second one for local networkIt has Ubuntu server OS with squid-server and dhcp3-server installedI have added few iptable rules to work like a router and redirect all http traffic to 3128 port This link is my reference. Everything worked fine for 2 days. All of a sudden internet speed went down drastically. When I connected the internet cable to my laptop to test the internet speed it was fine. Again when I reconnected it back to computer A everything was normal. This happened 4 times in a week. Could anyone here please help me why the internet speed is going down and it becomes normal when I reconnect the cable. EDIT: Rebooting the system (computer A) didn't make a difference. I have changed iptables so that http traffic doesn't redirect to 3128 port any further, still no change in the internet speed. I think the problem is not with squid but with something else. Here are my iptable rules SQUID_SERVER="10.1.1.1" INTERNET="eth1" LAN_IN="eth0" SQUID_PORT="3128" PROXYSERVERS=(Atlanta Baltimore Boston Chicago Dallas Denver Houston KansasCity LosAngeles Miami NewYork Philadelphia Phoenix SanAntonio SanDiego SanJose Seattle Washington) SERVERLEN=${#PROXYSERVERS[*]} I=0 iptables -F iptables -X iptables -t nat -F iptables -t nat -X iptables -t mangle -F iptables -t mangle -X modprobe ip_conntrack modprobe ip_conntrack_ftp echo 1 /proc/sys/net/ipv4/ip_forward iptables -P INPUT DROP iptables -P OUTPUT ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A OUTPUT -o lo -j ACCEPT iptables -A INPUT -i $INTERNET -m state --state ESTABLISHED,RELATED -j ACCEPT iptables --table nat --append POSTROUTING --out-interface $INTERNET -j MASQUERADE iptables --append FORWARD --in-interface $LAN_IN -j ACCEPT iptables -A INPUT -i $LAN_IN -j ACCEPT iptables -A OUTPUT -o $LAN_IN -j ACCEPT while [ $I -lt $SERVERLEN ]; do iptables -t nat -A PREROUTING -i $LAN_IN -p tcp -d ${PROXYSERVERS[$I]}.wonderproxy.com --dport 80 -j ACCEPT let I++ done iptables -t nat -A PREROUTING -i $LAN_IN -p tcp --dport 80 -j DNAT --to $SQUID_SERVER:$SQUID_PORT iptables -A INPUT --protocol tcp --dport 80 -j ACCEPT iptables -A INPUT --protocol tcp --dport 443 -j ACCEPT iptables -A INPUT --protocol tcp --dport 22 -j ACCEPT iptables -A INPUT -j LOG iptables -A INPUT -j DROP

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• FreeBSD slow transfers - RFC 1323 scaling issue?

  - by Trey

  I think I may be having an issue with window scaling (RFC 1323) and am hoping that someone can enlighten me on what's going on. Server: FreeBSD 9, apache22, serving a static 100MB zip file. 192.168.18.30 Client: Mac OS X 10.6, Firefox 192.168.17.47 Network: Only a switch between them - the subnet is 192.168.16/22 (In this test, I also have dummynet filtering simulating an 80ms ping time on all IP traffic. I've seen nearly identical traces with a "real" setup, with real internet traffic/latency also) Questions: Does this look normal? Is packet #2 specifying a window size of 65535 and a scale of 512? Is packet #5 then shrinking the window size so it can use the 512 scale and still keep the overall calculated window size near 64K? Why is the window scale so high? Here are the first 6 packets from wireshark. For packets 5 and 6 I've included the details showing the window size and scaling factor being used for the data transfer. Code: No. Time Source Destination Protocol Length Info 108 6.699922 192.168.17.47 192.168.18.30 TCP 78 49190 http [SYN] Seq=0 Win=65535 Len=0 MSS=1460 WS=8 TSval=945617489 TSecr=0 SACK_PERM=1 115 6.781971 192.168.18.30 192.168.17.47 TCP 74 http 49190 [SYN, ACK] Seq=0 Ack=1 Win=65535 Len=0 MSS=1460 WS=512 SACK_PERM=1 TSval=2617517338 TSecr=945617489 116 6.782218 192.168.17.47 192.168.18.30 TCP 66 49190 http [ACK] Seq=1 Ack=1 Win=524280 Len=0 TSval=945617490 TSecr=2617517338 117 6.782220 192.168.17.47 192.168.18.30 HTTP 490 GET /utils/speedtest/large.file.zip HTTP/1.1 118 6.867070 192.168.18.30 192.168.17.47 TCP 375 [TCP segment of a reassembled PDU] Details: Transmission Control Protocol, Src Port: http (80), Dst Port: 49190 (49190), Seq: 1, Ack: 425, Len: 309 Source port: http (80) Destination port: 49190 (49190) [Stream index: 4] Sequence number: 1 (relative sequence number) [Next sequence number: 310 (relative sequence number)] Acknowledgement number: 425 (relative ack number) Header length: 32 bytes Flags: 0x018 (PSH, ACK) Window size value: 130 [Calculated window size: 66560] [Window size scaling factor: 512] Checksum: 0xd182 [validation disabled] Options: (12 bytes) No-Operation (NOP) No-Operation (NOP) Timestamps: TSval 2617517423, TSecr 945617490 [SEQ/ACK analysis] TCP segment data (309 bytes) Note: originally posted http://forums.freebsd.org/showthread.php?t=32552

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• Make isolinux 4.0.3 chainload itself in VMWare

  - by chainloader

  I have a bootable iso which boots into isolinux 4.0.3 and I want to make it chainload itself (my actual goal is to chainload isolinux.bin v4.0.1-debian, which should start up the Ubuntu10.10 Live CD, but for now I just want to make it chainload itself). I can't get isolinux to chainload any isolinux.bin, no matter what version. It either freezes or shows a "checksum error" message. I'm using VMWare to test the iso. Things I have tried: .com32 /boot/isolinux/chain.c32 /boot/isolinux/isolinux-debug.bin (chainload self) this shows Loading the boot file... Booting... ISOLINUX 4.03 2010-10-22 Copyright (C) 1994-2010 H. Peter Anvin et al isolinux: Starting up, DL = 9F isolinux: Loaded spec packet OK, drive = 9F isolinux: Main image LBA = 53F00100 ...and the machine freezes. Then I've tried this (chainload GRUB4DOS 0.4.5b) chainloader /boot/isolinux/isolinux-debug.bin Result: Error 13: Invalid or unsupported executable format Next try: (chainload GRUB4DOS 0.4.5b) chainloader --force /boot/isolinux/isolinux-debug.bin boot Result: ISOLINUX 4.03 2010-10-22 Copyright (C) 1994-2010 H. Peter Anvin et al isolinux: Starting up, DL = 9F isolinux: Loaded spec packet OK, drive = 9F isolinux: No boot info table, assuming single session disk... isolinux: Spec packet missing LBA information, trying to wing it... isolinux: Main image LBA = 00000686 isolinux: Image checksum error, sorry... Boot failed: press a key to retry... I have tried other things, but all of them failed miserably. Any suggestions?

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• location of index.html CentOS 6

  - by user2118559

  Based on this http://www.servermom.com/how-to-add-new-site-into-your-apache-based-centos-server/454/ tutorial installed Apache-based CentOS Server I use putty.exe as editor vi /etc/httpd/conf/httpd.conf at very bottom modified to <VirtualHost *:80> ServerAdmin [email protected] DocumentRoot /var/www/fikitipis.com/public_html ServerName www.fikitipis.com ServerAlias fikitipis.com ErrorLog /var/www/fikitipis.com/error.log CustomLog /var/www/fikitipis.com/requests.log common </VirtualHost> So expect that index is at /var/www/fikitipis.com/public_html When in browser type ip address of server, see Apache 2 Test Page powered by CentOS and so on You may now add content to the directory /var/www/html/ Then [root@vps ~]# ls /var/www/ see cgi-bin domain.com error fikitipis.com html icons Checking content of directories ls /var/www/domain.com/public_html, ls /var/www/fikitipis.com/public_html, /var/www/html/ are empty Where is index.html? Did touch /var/www/fikitipis.com/public_html/index1.html then vi /var/www/fikitipis.com/public_html/index1.html, typed a, then wrote some text in file, then Escape and shift+zz. And in browser http://111.111.11.111/index1.html and see what I had wrote. So until now seems that all works

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• How can I set up Redmine => Active Directory authentication?

  - by Chris R

  First, I'm not an AD admin on site, but my manager has asked me to try to get my personal Redmine installation to integrate with ActiveDirectory in order to test-drive it for a larger-scale rollout. Our AD server is at host:port ims.example.com:389 and I have a user IMS/me. Right now, I also have a user me in Redmine using local authentication. I have created an ActiveDirectory LDAP authentication method in RedMine with the following parameters: Host: ims.example.com Port: 389 Base DN: cn=Users,dc=ims,dc=example,dc=com On-The-Fly User Creation: YES Login: sAMAccountName Firstname: givenName Lastname: sN Email: mail Testing this connection works just fine. I have, however, not successfully authenticated with it. I've created a backup admin user so that I can get back in to the me account if I break things, and then I've tried changing me to use the ActiveDirectory credentials. However, once I do, nothing works to log in. I have tried all of these login name options: me IMS/me IMS\me I've used my known Domain password, but no joy. So, what setting do I have wrong, or what information do I need to acquire in order to make this work?

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• Postfix 554 <[email protected]>: Relay access denied

  - by Matt

  So i am trying to set postfix up and I am running into some problems.....here is my files vim /etc/postfix/main.cf relayhost = [smtp.gmail.com]:587 smtp_connection_cache_destinations = smtp.gmail.com smtp_sasl_auth_enable=yes smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd smtp_sasl_tls_security_options = noanonymous tls_random_source = dev:/dev/urandom smtp_tls_CAfile= /etc/pki/CA/cacert.pem smtp_tls_security_level = may smtp_tls_scert_verifydepth = 9 append_dot_mydomain = no readme_directory = no myhostname = maggie.deliverypath.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = maggie.deliverypath.com, localhost.deliverypath.com, , localhost mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all I also have the gmail password info vim /etc/postfix/sasl_passwd gmail-smtp.l.google.com [email protected]:somepass smtp.gmail.com [email protected]:somepass then I try to follow this article and i get this output telnet mail.demoslice.com 25 Trying 67.207.128.80... Connected to www.slicehost.com. Escape character is '^]'. 220 www.slicehost.com ESMTP Postfix (Ubuntu) HELO test.demoslice.com 250 www.slicehost.com MAIL FROM:<[email protected]> 250 Ok RCPT TO:<[email protected]> 554 <[email protected]>: Relay access denied its started service postfix start * Starting Postfix Mail Transport Agent postfix ...done. then the screen gets frozen and i cant do anything....any ideas

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• Getting 502 instead of 503 when all backend servers are down running HAProxy behind Apache

  - by scarba05

  I'm testing running HAProxy as a dedicated load balancer behind Apache 2.2, replacing our current configuration where we use Apache's load balancer. In our current, Apache only, set-up if all the backend (origin) servers are down Apache will serve a 503 service unavailable message. With HAProxy I get a 502 bad gateway response. I'm using a simple reverse proxy rewrite rule in Apache RewriteRule ^/(.*) http://127.0.0.1:8000/$1 [last,proxy] In HAProxy I have the following (running in default tcp mode) defaults log global option tcp-smart-accept timeout connect 7s timeout client 60s timeout queue 120s timeout server 60s listen my_server 127.0.0.1:8000 balance leastconn server backend1 127.0.0.1:8001 check observe layer4 maxconn 2 server backend1 127.0.0.1:8001 check observe layer4 maxconn 2 Testing connecting directly to the load balancer when the backend servers are down: [root@dev ~]# wget http://127.0.0.1:8000/ test.html --2012-05-28 11:45:28-- http://127.0.0.1:8000/ Connecting to 127.0.0.1:8000... connected. HTTP request sent, awaiting response... No data received. So presumably this is down to the fact that HAProxy accepts the connection and then closes it.

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• Cannot ping Google Public DNS on 8.8.8.8

  - by Tibor

  I have a weird problem on my Windows 7 (x64) computer. I seem to cannot ping the Google Public DNS on one of its addresses (while the other works fine). The peculiar thing is that it fails with the General failure. error message which usually means that there is a problem with a network adapter/base connectivity and not a timeout as one would expect. I checked my routing tables for any anomalies and I even flushed them but the problem seems unrelated. All the other hosts I tried ping fine (either respond or timeout). If I try to tracert or connect to the address via browser (yes, I know that it doesn't listen on port 80), it also fails instantaneously. The reason I need to ping 8.8.8.8 is that I commonly use it as a test of Internet conectivity due to it being rememberable. The problem occurs no matter where I connect to the Internet (it is a laptop computer). What could be the cause of this anomaly? Note: I use native IPv6 connectivity.

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• Apache2 - rewrite a bunch of specified pathname URLs to one URL

  - by James Nine

  I need to rewrite a bunch of urls (about 100 or so) for SEO purposes, and there may be more being added in the future (probably another 50-100 later on). I need a flexible way of doing this and so far, the only way I can think of is to edit the .htaccess file using the rewrite engine. For example, I have a bunch of urls like this (please note that the query string is irrelevant, and dynamic; it could be anything. I was only using them purely as an example. I am only focusing on the pathname--the part between the hostname and query string, as marked in bold below): http://example.com/seo_term1?utm_source=google&utm_medium=cpc&utm_campaign=seo_term http://example.com/another_seo_term2?utm_source=facebook&utm_medium=cpc&utm_campaign=seo_term http://example.com/yet_another_seo_term3?utm_source=example_ad_network&utm_medium=cpc&utm_campaign=seo_term http://example.com/foobar_seo_term4 http://example.com/blah_seo_term5?test=1 etc... And they are all being rewritten to (for now): http://example.com/ What's the most efficient/effective way of doing this so that I may be able to add more terms in the future? One solution I came across is to do this (in the .htaccess file): RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule ^(.*)$ / [NC,QSA] However, the problem with this solution is that even invalid urls (such as http://example.com/blah) will be rewritten to http://example.com instead of giving a 404 code (which is what it is supposed to do anyway). I'm still trying to figure out how all this works, and the only way I can think of is to write 100 more RewriteCond statements (such as: RewriteCond %{REQUEST_URI} =/seo_term1 [NC,OR]) before the RewriteRule directive. For example: RewriteEngine on RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteCond %{REQUEST_URI} =/seo_term1 [NC,OR] RewriteCond %{REQUEST_URI} =/another_seo_term2 [NC,OR] RewriteCond %{REQUEST_URI} =/yet_another_seo_term3 [NC,OR] RewriteCond %{REQUEST_URI} =/foobar_seo_term4 [NC,OR] RewriteCond %{REQUEST_URI} =/blah_seo_term5 [NC] RewriteRule ^(.*)$ / [NC,QSA] But that doesn't sound very efficient to me. Is there a better way?

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• Emails sent through SMTP on VPS are considered to be spam

  - by Ilya

  During our business we have to make regular mailing to our clients: invoices, information emails, etc. Previously we received and sent emails using mail server of our hosting provider. But as the number of clients increased, we have to order VPS and install our own SMTP server their for performing our mailings. So, now we have default provider mail server for receiving emails, let it be business.com. We have email accounts like [email protected], etc. We use this mail server to receive emails and manage our email accounts. And we have SMTP server which is running on VPS. We use this SMTP only for sending emails with From addresses like [email protected]. VPS has default DNS records created by provider, let it be IP.AD.RE.SS <- ip-ad-re-ss.provider.com. Mailings are made using either desktop email clients or custom Java-based application which uses JavaMail for sending emails. The problem is that most of emails sent by us are placed in spam folders in clients email accounts. Clients have their email in Gmail, Yahoo, Hotmail, etc. Could you please tell what is the most probable reason and solution of described problem? Are there any service in Intranet where we can send test email and get an answer with description why this email could be considered to be spam?

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• debian VM refusing all traffic apart from http

  - by james lewis

  I've got a VM with a fresh install of Debian (wheezy) and I've installed node and mongo on it. The VM is using a bridged network connection so I was expecting to be able to point my host machines browser at the ip address of the Debian VM (port 1337 for my node example or port 28017 for my mongo status page) and see one of the two services (node or mongo). My requests are refused though. As far as I can tell Debian allows all traffic by default and you have to manually configure iptables to drop traffic. I've checked iptables and it says it's setup to allow anything through. It looks like this: root@devbox:/home/jlewis# 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 As a test I setup nginx and I was able to get to the nginx landing page from my host no problems so obviously http traffic is allowed. I then set nginx up to forward all traffic upstream to mongo - no problems there, I was able to see the status page. I then did the same for my example node server and again, no problems. So http traffic is fine, but all other traffic is blocked. Anyone know why debian might be refusing all other traffic other than iptables being setup to drop it? EDIT - output from netstat -nltp: Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:28017 0.0.0.0:* LISTEN 1762/mongod tcp 0 0 0.0.0.0:51028 0.0.0.0:* LISTEN 1541/rpc.statd tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 2462/sshd tcp 0 0 127.0.0.1:1337 0.0.0.0:* LISTEN 2794/node tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 2274/exim4 tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN 1762/mongod tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1510/rpcbind tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 2189/nginx tcp6 0 0 :::22 :::* LISTEN 2462/sshd tcp6 0 0 :::45335 :::* LISTEN 1541/rpc.statd tcp6 0 0 ::1:25 :::* LISTEN 2274/exim4 tcp6 0 0 :::111 :::* LISTEN 1510/rpcbind

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• Windows Virtual Machines will not run

  - by jlego

  I'm trying to setup a few virtual machines to use for testing websites in the various old versions of IE. I had Microsoft Virtual PC working on an older machine using XP mode and 2 other VHD's from Microsoft that allowed me to test in IE6-IE8. I've recently gotten a new work machine and am trying to set up the VMs again for testing, however nothing seems to be working. Both the old and the new system run Windows 7 64-bit Ultimate with AMD processors. I downloaded Virtual PC & XP mode from here http://www.microsoft.com/windows/virtual-pc/download.aspx and go through the installation process. XP mode is installed, but when I try to run it it goes through the initial setup process only to fail when it is almost complete with the error "Cannot Complete Setup". (After googling I see that this might be a conflict with my processor) I download other VHD's from here http://www.microsoft.com/windows/virtual-pc/download.aspx in order to get the other versions of IE and try to set those up in Virtual PC as well. I click on them to start the machine and both Windows 7 with IE8 and Windows Vista with IE7 just hang at a black screen. I try to use Virtual Box instead, and I get Windows XP with IE6 running, but I have no internet connection in the VM. I try all different settings and try to google the correct settings but nothing seems to work. When I load the VM, XP shows that its found new hardware but it needs the drivers. One of these pieces of hardware is the network adapter, but I can't connect to the internet to download the driver in the guest OS. VirtualBox tells me I need to install extensions in order for things to function properly. I go through the installation process in the guest OS and restart the VM, however now XP is asking for validation and I can't access the VM. I try installing the other 2 OS (Vista & 7) but I get a BSOD right after the startup screen appears and the VM restarts itself. I'm getting so frustrated trying to make this work, I would really appreciate any assistance on getting the VMs up and running or any alternatives for testing websites in Internet Explorer.

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• Apache2 Virtualhost practice config issue

  - by sisko

  I am practicing virtualhost configuration. In my /var/www directory I have created 3 directories called test1, test2 and test3 each of which has a simple index.php script in it. I:E test1/index.php etc. In /etc/apache2/sites-available/test1 I have the following configuration: <VirtualHost *:80> ServerAdmin webmaster@localhost ServerName test1 DocumentRoot /var/www/test1 <Directory /> Options FollowSymLinks AllowOverride All </Directory> <Directory /var/www/test1/> Options -Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined </VirtualHost> All the other sites have a similar virtualHost definition. I have enabled the site(the symlink appears in sites-enabled) and I have restarted apache. However, when I visit localhost/test1, I get a 404 Error. My error log show the following message: [Wed Oct 23 06:22:52 2013] [error] [client 127.0.0.1] File does not exist: /var/www/test1/test1 I don't know why I get the double test1/test1 in the error logs. I'm trying to find the right virtualHost setup which will allow all 3 test websites to be served from their URLs I:E test1/index.php, test2/index.php and test3/index.php. Can anyone help me out, please?

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• Apache /server-status/ gives a 404 not found

  - by kapshure

  I am trying to solve a problem where Apache stats aren't displaying correctly in Munin. I've ran through quite a bit of checks and tests regarding Munin setup, but I think my issue is related to Apache, but my skill set there is lacking. first, system info: monitored server CentOS 5.3 kernel 2.6.18-128.1.1.el5 Apache/2.2.3 "server-status" directive in httpd.conf (i've cross-compared this with another system that i did a successful parallel install of Munin on, correctly showing Apache stats, and the directive below is the same for both) ExtendedStatus On <Location /server-status> SetHandler server-status Order deny,allow Deny from all Allow from 127.0.0.1 </Location> ran lynx http://localhost/server-status got HTTP/1.1 404 taking a look at Apache access_log: 127.0.0.1 - - [13/Oct/2010:07:00:47 -0700] "GET /server-status HTTP/1.0" 404 11237 "-" "Lynx/2.8.5rel.1 libwww-FM/2.14 SSL-MM/1.4.1 OpenSSL/0.9.8e-fips-rhel5" mod_status is also loaded: % grep "mod_status" /etc/httpd/conf/httpd.conf LoadModule status_module modules/mod_status.so iptables is turned off also i did notice that the ownership status on httpd.conf on this system is root.root.. whereas the system that is displaying correctly is apache.www -- not certain that this matters?? its got to be permission issue, but i'm not certain where the permissions are messed up. any thoughts on why the test of server-status is giving me a 404?

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