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• How to subnet hosted VMs

  - by bwizzy

  I have a network of VMs each having a LAN IP address and a public IP address. They each have a 1:1 NAT map for public access via the public IP for HTTP, SSH etc. I'm trying to figure out a way to restrict the LAN IPs from talking to each other, but there are some cases where a group of LAN IPs will need to communicate. I'm using pfSense as a firewall / router on a 192.168.0.0/24 configuration. It seems like I could assign each VM it's own subnet and add a static route to the firewall for that VM to get back to the firewall for internet access / other fw rules. Is that right? I assigned 1 VM with: address 192.168.1.2 netmask 255.255.255.254 gateway 192.168.1.1 Then added a static route on the FW's LAN interface using 192.168.1.0/30 as the destination network and 192.168.1.1 as the gateway. Nothing appears to be working, anyone have any ideas? Please be aware I'm not that familiar with subnets. Thanks!

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• Redirect local, not internal, requests using SuSEfirewall2 or an iptables rule

  - by James

  I have a server that is running a web application deployed on Tomcat and is sitting in a test network. We're running SuSE 11 sp1 and have some redirection rules for incoming requests. For example we don't bind port 80 in Tomcat's server.xml file, instead we listen on port 9600 and have a configuration line in SuSEfirewall2 to redirect port 80 to 9640. This is because Tomcat doesn't run as root and can't open up port 80. My web application needs to be able to make requests to port 80 since that is the port it will be using when deployed. What rule can I add so that local requests get redirected by iptables? I tried looking at this question: How do I redirect one port to another on a local computer using iptables? but suggestions there didn't seem to help me. I tried running tcpdump on eth0 and then connecting to my local IP address (not 127.0.0.1, but the actual address) but I didn't see any activity. I did see activity if I connected from an external machine. Then I ran tcmpdump on lo, again tried to connect and this time I saw activity. So this leads me to believe that any requests made to my own IP address locally aren't getting handled by iptables. Just for reference he's what my NAT table looks like now: Chain PREROUTING (policy ACCEPT) target prot opt source destination REDIRECT tcp -- anywhere anywhere tcp dpt:http redir ports 9640 REDIRECT tcp -- anywhere anywhere tcp dpt:xfer redir ports 9640 REDIRECT tcp -- anywhere anywhere tcp dpt:https redir ports 8443 Chain POSTROUTING (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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• VirtualBox communication from Linux to/from Windows 7

  - by J. Otto Tennant

  VirtualBox is running in Windows 7 as the host. VirtualBox has the two modifications (one is called Guest Additions; don't remember the other). The Virtual machine has "bridged" networking selected. I have SAMBA set up (now, the problem may be here; it has been three or four years since I last did this) on the Linux guest machine. Neither guest nor host sees the other. From the Windows 7 command prompt, the IP address of the Linux guest pings. The IP address of another computer (a separate Windows 7 on the wireless network) pings from the Linux guest. (I have no idea what IP address the Windows 7 host itself has. The output of "netstat" does not seem to be useful.) So, it seem to me that something should be working. The only workgroup on the LAN is inventively named WORKGROUP. SMB4K should be seeing something. There must be a simple setup step that I am missing. (FWIW, there are two processes running smbd, and no process is running nmbd. YaST says that nmbd is set to run. I am not sure what this means.)

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• Forwarding HTTP Request with Direct Server Return

  - by Daniel Crabtree

  I have servers spread across several data centers, each storing different files. I want users to be able to access the files on all servers through a single domain and have the individual servers return the files directly to the users. The following shows a simple example: 1) The user's browser requests http://www.example.com/files/file1.zip 2) Request goes to server A, based on the DNS A record for example.com. 3) Server A analyzes the request and works out that /files/file1.zip is stored on server B. 4) Server A forwards the request to server B. 5) Server B returns file1.zip directly to the user without going through server A. Note: steps 4 and 5 must be transparent to the user and cannot involve sending a redirect to the user as that would violate the requirement of a single domain. From my research, what I want to achieve is called "Direct Server Return" and it is a common setup for load balancing. It is also sometimes called a half reverse proxy. For step 4, it sounds like I need to do MAC Address Translation and then pass the request back onto the network and for servers outside the network of server A tunneling will be required. For step 5, I simply need to configure server B, as per the real servers in a load balancing setup. Namely, server B should have server A's IP address on the loopback interface and it should not answer any ARP requests for that IP address. My problem is how to actually achieve step 4? I have found plenty of hardware and software that can do this for simple load balancing at layer 4, but these solutions fall short and cannot handle the kind of custom routing I require. It seems like I will need to roll my own solution. Ideally, I would like to do the routing / forwarding at the web server level, i.e. in PHP or C# / ASP.net. However, I am open to doing it at a lower level such as Apache or IIS, or at an even lower level, i.e. a custom proxy service in front of everything. Thanks.

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• Ubuntu second static IP, ifconfig, /etc/network/interfaces

  - by Schmoove

  I would like to add a second static IP to my local Ubuntu 11.10 desktop machine and have it automatically available after rebooting. So far I am successfully using ifconfig to to temporarily set up an alias for my primary network interface: # ifconfig eth1:0 192.168.178.3 up # ifconfig eth1 Link encap:Ethernet HWaddr c8:60:00:ef:a3:d9 inet addr:192.168.178.2 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::ca60:ff:feef:a3d9/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:61929 errors:0 dropped:0 overruns:0 frame:0 TX packets:64034 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:45330863 (45.3 MB) TX bytes:28175192 (28.1 MB) Interrupt:42 Base address:0x4000 eth1:0 Link encap:Ethernet HWaddr c8:60:00:ef:a3:d9 inet addr:192.168.178.3 Bcast:192.168.178.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Interrupt:42 Base address:0x4000 However, when I add the following to /etc/network/interfaces, the alias is not up and running as expected after a reboot: # vi /etc/network/interfaces auto eth1:0 iface eth1:0 inet static address 192.168.178.3 netmask 255.255.255.0 I would like to know what to configure to get this to work. As a side note, I am running gnome shell.

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• ddclient to update namecheap subdomain?

  - by LF4

  I have a subdomain that I want to update with ddclient. I configured the ddclient to get the IP from dyndns but it's not updating the subdomain on namecheap. They said to use yourdomain.com as the login instead of my actual domain. Has anyone been able to get namecheap DNS updated with ddclient? I'm running CentOS 6.2 with ddclient 3.7.3. When I run ddclient I get the following. CONNECT: checkip.dyndns.org CONNECTED: using HTTP SENDING: GET / HTTP/1.0 SENDING: Host: checkip.dyndns.org SENDING: User-Agent: ddclient/3.7.3 SENDING: Connection: close SENDING: RECEIVE: HTTP/1.1 200 OK RECEIVE: Content-Type: text/html RECEIVE: Server: DynDNS-CheckIP/1.0 RECEIVE: Connection: close RECEIVE: Cache-Control: no-cache RECEIVE: Pragma: no-cache RECEIVE: Content-Length: 106 RECEIVE: RECEIVE: <html><head><title>Current IP Check</title></head><body>Current IP Address: IPADD</body></html> Use of uninitialized value in string ne at /usr/sbin/ddclient line 1998. WARNING: skipping update of lf4bot from <nothing> to IPADD WARNING: last updated <never> but last attempt on Fri Jun 15 22:46:21 2012 failed. WARNING: Wait at least 5 minutes between update attempts. ddclient.conf File daemon=300 # check every 300 seconds syslog=yes # log update msgs to syslog mail=root # mail all msgs to root mail-failure=root # mail failed update msgs to root pid=/var/run/ddclient.pid # record PID in file. ssl=yes # use ssl-support. Works with use=web, web=checkip.dyndns.org/, web-skip='IP Address' # found after IP Address protocol=namecheap \ server=dynamicdns.park-your-domain.com \ login=yourdomain.com \ password=PASSWORD \ lf4bot

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• Cisco ASA 8.2 ACL For NAT

  - by javano

  Sadly I have gone back in time to ASA 8.2(5)33 which I am not so familiar with. I have configured NAT between two interfaces but traffic isn't passing becasue I can't get the ACL to work; (The full config which isn't very big is here but to keep this post tidy I have just pasted the important parts below); interface Ethernet0/0 switchport access vlan 108 ! interface Ethernet0/6 switchport access vlan 104 ! interface Ethernet0/7 switchport access vlan 105 ! interface Vlan104 description BUILDING2 nameif BUILDING2 security-level 0 ip address 10.104.0.1 255.255.255.0 ! interface Vlan105 description BUILDING1 nameif BUILDING1 security-level 0 ip address 10.105.0.1 255.255.255.0 ! interface Vlan108 description Main LAN VLAN nameif lan security-level 0 ip address 172.22.0.215 255.255.255.0 ! object-group network obj_net_Remote_Hosts network-object host 111.111.111.3 network-object host 111.111.111.65 object-group network obj_host_pc1_eth1 network-object host 10.104.0.111 object-group network obj_host_pc2_eth1 network-object host 10.104.0.112 object-group network obj_host_pc3_eth1 network-object host 10.104.0.106 object-group network obj_host_pc4_eth1 network-object host 10.104.0.107 object-group network obj_net_PCs description IPs of PCs group-object obj_host_pc1_eth1 group-object obj_host_pc2_eth1 group-object obj_host_pc3_eth1 group-object obj_host_pc4_eth1 access-list acl_NAT_pc1_91 extended permit tcp host 10.104.0.111 host 111.111.111.3 eq 8101 access-list acl_Permit_PCs extended permit tcp object-group obj_net_PCs object-group obj_net_Remote_Hosts eq 8101 ! global (BUILDING1) 11 111.111.222.91 netmask 255.255.255.255 nat (BUILDING2) 11 access-list acl_NAT_pc1_91 access-group acl_Permit_PCs in interface BUILDING2 route BUILDING1 111.111.111.3 255.255.255.255 10.105.0.2 1 route BUILDING1 111.111.111.65 255.255.255.255 10.105.0.2 1 When I try and connect from PC1 to ip 111.111.111.3 I see the following error logged on the ASA console; %ASA-2-106001: Inbound TCP connection denied from 10.104.0.111/38495 to 111.111.111.3/8101 flags SYN on interface blades What the duce!

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• Windows 7 VPN Error 619

  - by TravisPUK

  So I am running Windows 7 Enterprise. This morning I was able to VPN using the built in VPN (Connect to Work Network etc). I had to change my network's IP address range and now the VPN will not work. It just stalls on the Verifying user name and password... message. But then it returns the 619 error. Anybody know why changing my machine's IP address would cause this problem? Where should I be looking to try and fix this issue? I have tried this on a Windows XP machine that also had the IP address range change and this still connects fine using exactly the same connection details. EDIT The internal network range changed from 192.x.x.x to 10.x.x.x. This was done on the entire Active Directory. All machines are running fine and the Windows XP machine, that works going to the same client VPN mentioned above is on the same network. Both the XP and the Win 7 machines are using DHCP served by the Domain Controller. The client domain is not performing any IP range checks/restrictions. The VPN is outside the internal network, connection is being made via the Internet and not passing through any other machine, other than the normal domain machines, ie DNS etc. This is passing through a router and the router has the relevant VPN passthrough options configured. All internal machines are working correctly with other forms of VPN, ie Cisco, Sonic etc (these were tested on other machines, they are not installed on the Vista or Win7 machines). After further testing, this is occurring on all Win7 and Vista machines where they can no longer connect to the client VPN, however all XP machines can still connect fine. This has been tested on three Vista, two Win7 and five XP machines. All machines are on DHCP and tests have been done with both the firewalls turned on and off, as well as with fixed IPs being used. Thanks Travis

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• "Delivered-To" Header in Exchange

  - by Kaii

  In some SMTP server implementations (i.e. Postfix) you can enable Delivered-To and X-Original-To headers that will be added to your email. (or [X-]Envelope-To) This is very helpful with distribution lists to determine which e-mail address the mail has been redirected to. So, when the mail has been sent to [email protected], you can see in the Delivered-To or Envelope-To header that it has been redirected (distributed) to [email protected], which is one of many other e-mail addresses that are linked to a single mailbox. How do I find which address was used to deliver this mail to a specific mailbox on Microsoft Exchange 2010? Looking at the plain message (with all headers) i can not find any information that the mail arrived via address [email protected] I think I need the Delivered-To header (or a similar one) to be set on Microsoft Exchange when a mail is delivered via distribution lists. Is there any way to enable such header in Exchange 2010? I need it so that our Ticket system (OTRS) correctly recognizes where the ticket belongs to. Adding all the e-mail addresses of all distribution lists to the system configuration is not the right solution. And if there is a solution for Exchange 2010, is this possibly also applicable to Exchange 2007?

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• Allow incoming connections on Windows Server 2008 R2

  - by Richard-MX

  Good day people. First, im new to Windows Server. I've always used Linux/Apache combo, but, my client has and AWS EC2 Windows Server 2008 R2 instance and he wants everything in there. Im working with IIS and PHP enabled as Fast-CGI and everything is working, but, i cant see the websites stored in it from internet. The public DNS that AWS gave us for that instance is: http://ec2-XX-XXX-XXX-121.us-west-2.compute.amazonaws.com/ But, if i copy paste that address, i get nothing, no IIS logo or something like that. My common sense tells me that maybe the firewall could be blocking the access. Can anyone help me and tell where to enable some rules to get this thing working? I don't wanna start enabling rules at random and make the system insecure. If you need any additional info, you can ask me and i will provide it. Thanks in advance. UPDATE: Amazon EC2 display this: Public DNS: ec2-XX-XXX-XXX-121.us-west-2.compute.amazonaws.com Private DNS: ip-XX-XXX-XX-252.us-west-2.compute.internal Private IPs: XX.XXX.XX.25 In my test microinstance, i just to use the Public DNS address (the one that starts with "ec2") and it works like a charm (of course, the micro instance have its own Public DNS im not assuming same address for both instances...) However, for the large instance, i tried to do the same. Set up everything as in the micro instance but if i use the Public DNS, it doesnt load anything. Im suspicious about the Windows Firewall, but, the HTTP related stuff is enabled. What should i do to get access to the large instance? I don't want to set up the domain yet, i want access from an amazon url. 2ND EDIT: all fixed. Charles pointed that maybe Security Groups was not properly set up for the instance. He was right. Just added HTTP service to the rules and all works good.

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• How can I diff two Redhat Linux servers?

  - by Stuart Woodward

  I have two servers that have should have the same setup except for known differences. By running: find / \( -path /proc -o -path /sys -o -path /dev \) -prune -o -print | sort > allfiles.txt I can find a list of all the files on one server and compare it against the list of files on the the other server. This will show me the differences in the names of the files that reside on the servers. What I really want to do is run a checksum on all the files on both of the servers and compare them to also find where the contents are different. e.g find / \( -path /proc -o -path /sys -o -path /dev \) -prune -o -print | xargs /usr/bin/sha1sum Is this a sensible way to do this? I was thinking that rysnc already has most of this functionality but can it be used to provide the list of differences?

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• datacenter network change control best practices

  - by jpolache

  I have been tasked with compiling a list of possible network equipment changes at a data center. The task includes tagging which changes need change control and which don't. Does anyone know of a "best practices" list that I can start from? The methods for doing change control at this data center are well established. The list would be of specific configuration items that should or should not be included in the change control process, of example; static route entries switch port assignments firewall rule additions/changes etc.

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• Windows 8 Pro Hyper-V guest with no internet

  - by Perplexed

  Trying to get this working on my Windows 8 Pro machine. I created an External Switch Assigned the newly available adapter to a Guest machine with Win 2008 os. My host has internet connection. Host can ping Guest, Guest cannot ping Host. Guest has no internet connection. Pasting the ip of both host and guest. Your help appreciated. HOST ========================== Ethernet adapter vEthernet (EXTSW01): Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter #2 Physical Address. . . . . . . . . : 9C-B7-0F-0F-D7-D0 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::5434:a9fd:8611:d207%54(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.15(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Saturday, September 8, 2012 12:34:44 PM Lease Expires . . . . . . . . . . : Saturday, September 15, 2012 12:34:44 PM Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DHCPv6 IAID . . . . . . . . . . . : 916240141 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-DC-C9-2C-9C-B7-0D-0D-D7-D0 DNS Servers . . . . . . . . . . . : 64.71.255.999 NetBIOS over Tcpip. . . . . . . . : Enabled GUEST ========================== Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Adapter Physical Address. . . . . . . . . : 00-15-5D-3F-0F-00 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::953f:ec5c:5d84:1b50%11(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.20(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 0.0.0.0 DHCPv6 IAID . . . . . . . . . . . : 234886493 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-DD-2F-29-0F-15-5E-00-0F-00 DNS Servers . . . . . . . . . . . : ::1 127.0.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled

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• How to unblacklist an IP at Google?

  - by DJRayon

  I own a small business with two servers for webhosting. When setting up the primary (CentOS 5.5 + WHM, secondary is WHM DNS Only) server I kinda messed up the firewall, so the hackers could send stuff from my server. My primary IP is x.y.29.218. Anyway - I got blacklisted in several places, but now those blacklistings are gone. For a week or so, but Google still has my IP blacklisted. I handling serious damages because of that. Many clients want to switch from my hosting, etc. I've fixed the hole with CSF firewall SMTP_BLOCK option and enabled also the WHM SMTP TEAK Currently all I see from the Main Email View Mail Statistics (Errors section) in WHM is rows and rows of the following message removed-the-email-address-for-security R=lookuphost T=remote_smtp: SMTP error from remote mail server after end of data: host aspmx.l.google.com [a.b.39.27]: 550-5.7.1 [x.y.29.218 1] Our system has detected an unusual rate of\n550-5.7.1 unsolicited mail originating from your IP address. To protect our\n550-5.7.1 users from spam, mail sent from your IP address has been blocked.\n550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review\n550 5.7.1 our Bulk Email Senders Guidelines. h24si3868764fas.171 What are my options? I have one IP free. How can I configure Exim to send mail from that IP? My brain is like constantly blowing up because of this problem. Please someone, who has any knowledge how to deal with the current situation, please give me some kind of help - any help, suggestions, etc. I've tried everything I know, and I still don't know much, because this is the first time (I just started to webhost, etc) I deal with real physical servers not some kind of pre-setup VPS solution. Many - many thanks, whoever has time to offer some help.

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• Nmap XML parsing with Powershell

  - by Craig620

  I am trying to parse the XML output from NMAP and isolate just the hostadddress and the vendor from the osmatch. I've actually done that with the following: select-xml -path nmap.xml -xpath "nmaprun/host/address/@addr|nmaprun/host/os/osmatch/osclass/@vendor" | select -expandproperty node Which produces: #text ----- 10.20.30.1 HP 10.20.30.2 Linux 10.20.30.3 HP What I was not expecting is that it would jam it all into a single column.Silly me would like the address in one column, and the vendor in another column. I Would like: #addr #vendor ----- ------- 10.20.30.1 HP 10.20.30.2 Linux 10.20.30.3 HP In the several hours I spent learning xpath today, I also realized that this file has a single address for each host, but multiple OS guesses for each host. I would also like to use only the first osGuess in the output. Tired using: -xpath "(nmaprun/host/os/osmatch/osclass/@vendor)[1]" But that truncates the whole data set to a single line of output, instead of only limiting the only the first osclass element of each host. Changing the parens to surround only the @vendor element like .../(@vendor)[1] and .../(@vendor[1]) but both fail with "Expression must evaluate to a node-set." Thanks in advance

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• VMWare Fusion cannot connect to the NAT connection on my Mac

  - by FFish

  I have been using VMWare Fusion on my Mac to check out my websites on localhost. Now I can't connect anymore with the NAT connection. There seems to be a problem with my IP address or Mac address? I have no idea what causes this, it was working fine before!? In the XP (SP2) VM, in the taskbar I see the Local Area Connection with the yellow warning icon. The bubble says: "This connection has limited or no connectivity. You might not be aisle to access the Internet or some network resources. For more information, click this message." Doing that opens up the Local Area Connection Status panel. In the Support tab, when I click the repair button I get following message: "Windows could not finish repairing the problem because the following action cannot be completed: Renewing IP address." I tried disabling my firewall and also XAMPP that I use as server on OSX. VMWware version: 3.1 VM: XP SP2 Mac OSX 10.6.3 Any help would be greatly appreciated.

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• FreeBSD Ports: How can I see all dependencies for a port, and all subdependencies for those dependencies?

  - by Stefan Lasiewski

  I'm trying to build a port which depends on apache-ant. I thought I could run make build-depends-list to see all dependencies required by this port: # make build-depends-list /usr/ports/devel/apache-ant /usr/ports/java/jdk16 /usr/ports/math/gmp But after installing everything, the port had a dependency list which was a mile long: apache-ant-1.8.1 desktop-file-utils-0.15_2 gamin-0.1.10_4 gettext-0.18.1.1 gio-fam-backend-2.26.1 glib-2.26.1_1 gmp-5.0.1 inputproto-2.0 javavmwrapper-2.3.5 kbproto-1.0.4 libX11-1.3.3_1,1 libXau-1.0.5 libXdmcp-1.0.3 libXext-1.1.1,1 libXi-1.3,1 libXtst-1.1.0 libiconv-1.13.1_1 libpthread-stubs-0.3_3 libxcb-1.7 pcre-8.12 perl-5.10.1_3 pkg-config-0.25_1 python26-2.6.6 recordproto-1.14 unzip-6.0 xextproto-7.1.1 xproto How can I see all dependencies, and all subdependencies for a port?

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• Oracle 10g for Windows does not start up on system boot

  - by Mike Dimmick

  We have an Oracle 10g Enterprise Edition installation (10.2.0.1.0) on a Windows Server 2003 virtual machine. It was initially created with Virtual Server 2005 R2 SP1 but has now been migrated to Windows Server 2008 Hyper-V. The services start on system boot, but the instance does not start up. This problem was actually occurring on Virtual Server after a migration from one server to another, but I managed to fix it then with: oradim -edit -sid ORCL -startmode auto However, this now has no effect. oradim.log (in %OracleHome%\database\oradim.log) says: Thu Jun 10 14:14:48 2010 C:\oracle\product\10.2.0\db_3\bin\oradim.exe -startup -sid orcl -usrpwd * -log oradim.log -nocheck 0 Thu Jun 10 14:14:48 2010 ORA-12560: TNS:protocol adapter error sqlnet.log in the same folder has: Fatal NI connect error 12560, connecting to: (DESCRIPTION=(ADDRESS=(PROTOCOL=BEQ)(PROGRAM=oracle)(ARGV0=oracleorcl)(ARGS='(DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))'))(CONNECT_DATA=(SID=orcl)(CID=(PROGRAM=C:\oracle\product\10.2.0\db_3\bin\oradim.exe)(HOST=ORACLE-VM)(USER=SYSTEM)))) VERSION INFORMATION: TNS for 32-bit Windows: Version 10.2.0.1.0 - Production Oracle Bequeath NT Protocol Adapter for 32-bit Windows: Version 10.2.0.1.0 - Production Time: 10-JUN-2010 14:14:48 Tracing not turned on. Tns error struct: ns main err code: 12560 TNS-12560: TNS:protocol adapter error ns secondary err code: 0 nt main err code: 530 TNS-00530: Protocol adapter error nt secondary err code: 2 nt OS err code: 0 The ORA_ORCL_AUTOSTART registry value is set to TRUE, so it should be auto-starting - and you can see that it's trying to. The problem also occurs when stopping and restarting the OracleServiceORCL service. I've enabled SQL*Net tracing which shows: [10-JUN-2010 15:09:33.919] snlpcss: entry [10-JUN-2010 15:09:34.419] snlpcss: Unable to spawn Oracle oracle (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq))) orcl, error 2. [10-JUN-2010 15:09:34.419] snlpcall: exit On a hunch that error 2 is Windows error 2 (file not found) I tried restarting the service with Process Monitor watching oradim.exe, but this appears to delay things just enough that it always works. Right now I have a horrible hack where I've created a Scheduled Task to run oradim -startup -sid ORCL when the Administrator account logs on, and set the VM to auto-logon. I'd still like to work out why it's not working.

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• ports only available from the outside network

  - by ChrisJ

  This is a counter-intuitive problem for me. I have a new Win 2003 server on a static IP address w.x.y.z. Tomcat 7, PostgreSQL 9.1, and Subversion are installed. All of it appears to be working fine from the server itself. We can also access the Tomcat manager, web applications, and run "svn ls svn://w.x.y.z/" from outside our network. However, when I try from another machine in the office, phpPgAdmin and svn cannot establish connections with the server. http://w.x.y.z:5432/phppgadmin cannot connect. The svn command from above returns: svn: E730061: Unable to connect to a repository at URL 'svn://w.x.y.z/' svn: E730061: Can't connect to host 'w.x.y.z': No connection could be made because the target machine actively refused it. Tomcat manager and the other web apps we have deployed work fine. Netstat -a from the server shows this: Proto Local Address Foreign Address State TCP SERVERNAME:3690 SERVERNAME:0 LISTENING TCP SERVERNAME:5432 SERVERNAME:0 LISTENING Windows Firewall was off, but just in case I also tried to enable it and open ports 3690 (svn) and 5432 (postgres). No change. I don't have access to the router/switch because it just doesn't work that way in Port-au-Prince and our sysadmin is on R&R. Is there anything that might be causing the problem from the server side?

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• Pasting extended ACL contents into telnet session to Cisco Router SIM

  - by Kyle Brandt

  I have a telnet session to a dynamips router sim. When I try to paste the contents of an actually working ACL retrieved from 'show run' into the access list, only part of gets pasted. The session is something like: enable conf t ip access-list extended Internet <PASTE of Rules> It stops right in the middle of a line: permit tcp any host 123.123.123.123 gt 1 ! should be gt 1023 Anyone know what is happening? The source is an extended access list.

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• Options for small windows network setup without dedicated server?

  - by Mitch

  I'm very weak on networking and hope someone can point me in the right direction: I have written some windows client/server software which incorporates a database which is located on a windows server. I have a test installation running at a customer's office where the server has a static IP address. In this case its easy for the clients to access the database because of the fixed IP address. Also, customers with network servers generally have specialist support staff to set up my software, so its not such a problem for me. However I also need to offer the software to customers who have small offices with less than 10 PCs and no dedicated network server. In this case I want the customer to be able to nominate one PC as the database "server" and install my software and have the clients access it. But in this situation I believe the "server" PC may not have a dedicated IP address. Q1: What is the best way to set this up simply and make it work? Can I reliably reference the "server" by using its name, or is there a way to assign dummy fixed IP addresses? Ideally this needs to be workable on small networks running a mixture of XP/Vista/Windows7 as my target market may well have mixed OSes etc. I guess this would be akin to home networking? Many thanks Mitch

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• Unable to access network resources through VPN

  - by fbueckert

  I'm currently attempting to connect one of our computers in the office to a client VPN. My development machine is running Windows 7, and can connect and see resources just fine. The problem computer is running Windows XP. They're both within the same network. Using the same credentials at both computers, the VPN connection (using the built in Windows network connections) works just fine. So far, so good. An IP address is assigned, and comparing both machines shows they're still in the same subnet. The problem is that the XP machine cannot see ANY of the computers in the client network. I tried a tracert to a target machine on the Windows 7 box, and the first item that comes up is the .0 address. Pinging it gives responses. Trying it on the Windows XP machine, however, comes up with just timeouts. Trying to trace to www.google.com allows the address to resolve (probably part of the cached resolutions), but results in just timeouts. I double-checked to make sure that the Windows firewall was not on, and trying to open the settings brings up a notification that the firewall service wasn't running, which leads me to believe that it's definitely not on. From my best guess, I've managed to connect the XP machine to a black hole of some sort. There's obviously something strange going on, but I'm not sure where I should be looking.

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• Bridging my laptop's wireless and wired adaptors

  - by stacey.richards

  I would like to be able to connect a desktop computer that does not have a wireless adapter to my wireless network. I could just run a network cable from my ADSL/wireless router to the desktop computer but sometimes this is not practical. What I would really like to do is bridge my laptop's wireless and wired adapters in such a way that I can run a network cable from my laptop to a switch and another network cable from the switch to a desktop computer so that the desktop computer can access the Internet through my ADSL/wireless router via my latop: +--------------------+ |ADSL/wireless router| +--------------------+ | +-------------------------+ |laptop's wireless adaptor| | | |laptop's wired adaptor | +-------------------------+ | +------+ |switch| +------+ | +-----------------------+ |desktop's wired adapter| +-----------------------+ A bit of Googling suggests that I can do this by bridging my laptop's wireless and wired adapters. In Windows XP's Network Connections I select both the Local Area Connection and the Wireless Network Connection, right click and select Bridge Connections. From what I gather, this (layer 2?) bridge will examine the MAC address of traffic coming from the wireless network and pass it through to the wired network if it suspects that a network adapter with that MAC address may be on the wired side, and vice-versa. If this is the case, I would assume that when the desktop computer attempts to get an IP address from a DHCP server (which is running on the ADSL/wireless router), it would send a DHCP broadcast packet which would pass through the laptop's bridge to the router and the reply would return through the laptop's bridge back to the desktop. This doesn't happen. With some more Googling I find some instruction how this can be done with Linux. I reboot to Ubuntu 9.10 and type the following: sudo apt-get install bridge-utils sudo brctl addbr br0 sudo brctl addif br0 wlan0 sudo brctl addif br0 eth0 sudo ipconfig wlan0 0.0.0.0 sudo ipconfig eth0 0.0.0.0 Once again, the desktop cannot reach the ADSL/wireless router. I suspect that I'm missing some simple important step. Can anyone shed some light on this for me?

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• Nginx Ip Whitelist

  - by Will

  Is it possible to create a ip whitelist for my nginx proxy server without adding allow or deny in the config file is it possible i can get nginx to link to a separate database to check if the user is allowed to access the website . Ideally i could do with nginx linking to an external database or at minimum a list off allowed ips on the same server so i can easily update the list whit out restarting nginx every time. In the future i would like to link nginx to my website and a user will login and there ip will be linked to there account and they will be able to update there ip if it has changed to there new one to grant them access so i need to keep in mind that it would be easyer to do this if i have external list off ips in some kind off database any help is apreshiated

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• Sending mail through local MTA while domain MX records point to Google Apps

  - by Assaf

  My domain's email is managed by Google Apps, so that domain users get Gmail and Calendar, etc. But I also want to be able to send applicative notifications to users outside the domain via email (e.g. "some commented on your post", and so on). However, if I try to send email through code I get blocked by Gmail after a few emails. I send marketing email through MailChimp, to minimize the risk of appearing as spam to my users (one-click unsubscribe, etc.). But I can't send applicative message in this way. I want to install a local MTA (my server runs Ubuntu), but I'm not sure what anti-spam measures I need to implement so that receiving MTAs don't think it's a spam server. What's stopping anyone from setting up a mail server and sending emails using my domain name? AFAIK it's the DNS records that show the MTA's address actually belongs to the domain. But my understanding of this is rather superficial, so someone please correct me if I'm wrong. But what sort of DNS configuration do I need to put in place so that I don't get blacklisted (assuming I don't actually spam anyone)? The MX records already point to Google, and I'd like to keep it this way. So do I just need to define an A record for my internal mail server? Should it show email as coming from a sub-domain, so as not to conflict with the bare domain being managed by google? Edit: Does the following SPF record make sense if I want email from my domain name to be sent by either google's servers or any server with a dns name ending with mydomain.com? "v=spf1 ptr mx:google.com mx:googlemail.com ~all" How should I set up reverse DNS for my server? If I have an A record that points mailsender.mydomain.com to my MTA's ip address, does it mean that reverse lookup will only allow emails sent from [email protected]?

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