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• Telling subversion client to ignore certificate errors

  - by Pekka

  I have set up a copy of Redmine through the Bitnami Redmine Stack and am having trouble accessing a remote SVN repository through https. The trouble seems to be related to the fact that I don't have a signed certificate, and the certificate provided doesn't match the host name (I am accessing the same server through a number of host names). I am new to Ruby, Mongrel, Rails and Redmine. Following the advice in this forum thread, I changed the path Redmine uses to invoke the svn client in \apps\redmine\lib\ redmine\scm\adapters\subversion_adapter.rb from SVN_BIN = "svn" to SVN_BIN = "svn --trust-server-cert --non-interactive --config-dir c:/user/temp" I was hoping that the --trust-server-cert option would fix the certificate problem. However, I am still getting the following error message in mongrel.log: svn: OPTIONS of 'https://server.xyz:8443/svn/reponame': Server certificate verification failed: certificate issued for a different hostname, issuer is not trusted (https://server.xyz:8443) Does anybody know what to do about this? Additional info: I re-started the mongrel service after each change I am sure the configuration change has taken effect because subversion has created a full configuration directory in c:\user\temp I can access the remote repository using command line svn no problem The remote repository runs on a Windows box with VisualSVN

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• How can I solve http_port 3129 intercept with squid?

  - by wmoreno3

  My system: uname -a FreeBSD server.local.jmorenov.com.co 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec 4 09:23:10 UTC 2012 [email protected]:/usr/obj/usr/src/sys/GENERIC amd64 pkg info | grep squid squid-3.2.7 HTTP Caching Proxy I have this configuration in squid.conf: http_port 3128 accel vhost allow-direct # OK http_port 3129 intercept # Does not work icp_port 0 When I tried with: http_port 3129 intercept By switch line on ipnat.rules. In access log appears: 2013/01/09 00:46:03 kid1| IPF (IPFilter) NAT open failed: (13) Permission denied 2013/01/09 00:46:03 kid1| BUG #3329: Orphan Comm::Connection: local=127.0.0.1:3129 remote=192.168.1.129:51595 FD 24 flags=33 2013/01/09 00:46:03 kid1| NOTE: 1 Orphans since last started. /var/log/squid/cache.log 2013/02/08 09:02:33 kid1| Squid plugin modules loaded: 0 2013/02/08 09:02:33 kid1| Accepting reverse-proxy HTTP Socket connections at local=127.0.0.1:3128 remote=[::] FD 33 flags=9 2013/02/08 09:02:33 kid1| Accepting NAT intercepted HTTP Socket connections at local=127.0.0.1:3129 remote=[::] FD 34 flags=41 My /etc/ipnat.rules: root@server:/root # cat /etc/ipnat.rules # em0 = External NIC # bge0 = Internal NIC map em0 0/0 -> 0/32 proxy port ftp ftp/tcp map em0 0/0 -> 0/32 portmap tcp/udp auto map em0 0/0 -> 0/32 # Redirect direct web traffic to local web server. rdr em0 192.168.0.3/32 port 80 -> 127.0.0.1 port 80 tcp rdr bge0 192.168.1.3/32 port 80 -> 127.0.0.1 port 80 tcp # Redirect everything else to squid on port 3128 or 3129 intercept rdr em0 0.0.0.0/0 port 80 -> 127.0.0.1 port 3128 tcp rdr bge0 0.0.0.0/0 port 80 -> 127.0.0.1 port 3128 tcp #rdr em0 0.0.0.0/0 port 80 -> 127.0.0.1 port 3129 tcp #rdr bge0 0.0.0.0/0 port 80 -> 127.0.0.1 port 3129 tcp With 3128 is OK, but with 3129, Does not work, when switch in ipnat.rules.

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• configure a Cisco ASA to use MS-CHAP v2 for RADIUS authentication

  - by DrStalker

  Cisco ASA5505 8.2(2) Windows 2003 AD server We want to configure our ASA (10.1.1.1) to authenticate remote VPN users through RADIUS on the Windows AD controller (10.1.1.200) We have the following entry on the ASA: aaa-server SYSCON-RADIUS protocol radius aaa-server SYSCON-RADIUS (inside) host 10.1.1.200 key ***** radius-common-pw ***** When I test a login using the account COMPANY\username I see the users credentials are correct in the security log, but I get the following in the windows system logs: User COMPANY\myusername was denied access. Fully-Qualified-User-Name = company.com/CorpUsers/AU/My Name NAS-IP-Address = 10.1.1.1 NAS-Identifier = <not present> Called-Station-Identifier = <not present> Calling-Station-Identifier = <not present> Client-Friendly-Name = ASA5510 Client-IP-Address = 10.1.1.1 NAS-Port-Type = Virtual NAS-Port = 7 Proxy-Policy-Name = Use Windows authentication for all users Authentication-Provider = Windows Authentication-Server = <undetermined> Policy-Name = VPN Authentication Authentication-Type = PAP EAP-Type = <undetermined> Reason-Code = 66 Reason = The user attempted to use an authentication method that is not enabled on the matching remote access policy. My assumption is that the ASA is using PAP authentication, instead of MS-CHAP v2; the credentials are confirmed, the proper Remote Access Policy is being used, but this policy is set to only allow MS-CHAP2. What do we need to do on the ASA to make it us MS-CHAP v2? In the ADSM GUI The "Microsoft CHAP v2 compatible" tickbox is enabled, but I don't know what this corresponds to in the config.

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• powershell v2 remoting - How do you enable unecrypted traffic

  - by Peter Walke

  I'm writing a powershell v2 script that I'd like to run against a remote server. When I run it, I get the error : Connecting to remote server failed with the following error message : The WinRM client cannot process the request. Unencrypted traffic is currently disabled in the client configuration. Change the client configurati on and try the request again. For more information, see the about_ Remote_Troubleshooting Help topic. I looked at the online help for about _ Remote_Troubleshooting, but it didn't point me towards how to enable unecrypted traffic. Below is the script that I'm using that is causing me problems. Note: I have already run Enable-PSRemoting on the remote machine to allow it to accept incoming requests. I have tried to use a session option variable, but it doesn't seem to make any difference. $key = "HKLM:\SOFTWARE\Microsoft\PowerShell\1\ShellIds" Set-ItemProperty $key ConsolePrompting True $tvar = "password" $password = ConvertTo-SecureString -string $tvar -asPlainText –force $username="domain\username" $mySessionOption = New-PSSessionOption -NoEncryption $credential = New-Object System.Management.Automation.PSCredential($username,$password) invoke-command -filepath C:\scripts\RemoteScript.ps1 -sessionoption $mySessionOption -authentication digest -credential $credential -computername RemoteServer How do I enable unencrypted traffic?

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• Having trouble using psservice and sc.exe between Windows Server 2008 machines

  - by Teflon Mac

  I'm trying to control services on one W2k8 machine from another; no domain just a workgroup. The user account I'm logged in as is an administrator on both machines. I've tried both psservice and sc.exe. These work in a Windows Server 2003 environment but it looks like I need to an extra step or two due to the changed security model in 2008. Any ideas as to how grant permission to the Service Control Manager (psservice) or OpenService (sc)? I tried running the DOS window with "Run As Administrator" and it made no difference. With psservice I get the following D:\mydir>psservice \\REMOTESERVER -u "adminid" -p "adminpassword" start "Display Name of Service" PsService v2.22 - Service information and configuration utility Copyright (C) 2001-2008 Mark Russinovich Sysinternals - www.sysinternals.com Unable to access Service Control Manager on \\REMOTESERVER: Access is denied. In the remote server, I get the following message in the Security Log so I know I connect and login to the remote machine. I assume it then fails on a subsequent authorization step. The logoff message in the security log is just that ("An account was logged off."), so no extra info there. Special privileges assigned to new logon. Subject: Security ID: REMOTESERVER\adminid Account Name: adminid Account Domain: REMOTESERVER Logon ID: 0xxxxxxxx Privileges: SeSecurityPrivilege SeBackupPrivilege SeRestorePrivilege SeTakeOwnershipPrivilege SeDebugPrivilege SeSystemEnvironmentPrivilege SeLoadDriverPrivilege SeImpersonatePrivilege sc.exe is similar. The command syntax and error differs as below but I also see the same login message in the remote server's security log. D:\mydir>sc \\REMOTESERVER start "Registry Name of Service" [SC] StartService: OpenService FAILED 5: Access is denied.

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• Can't get my OpenVpn client to connect

  - by Larry

  Hi Guys, I am trying to setup a test vpn between my home desktop and my laptop. So far I have got the server on the desktop to connect fine but I can not get my laptop to finish the connection. I have tried several different configurations and they all give me the same result. Obviously it has nothing to do with my Client configuration but possibly something on my laptop? Here is the message I get in the log when it stops then times out and restarts. Mon Oct 18 20:10:55 2010 UDPv4 link local: [undef] Mon Oct 18 20:10:55 2010 UDPv4 link remote: 74.190.29.236:1194 Mon Oct 18 20:11:55 2010 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity) Mon Oct 18 20:11:55 2010 TLS Error: TLS handshake failed here are my configurations server.ovpn port 1194 proto udp dev tun ca ca.crt cert server.crt key server.key dh dh1024.pem server 10.8.0.1 255.255.255.252 ifconfig-pool-persist ipp.txt push "route 10.0.0.1 255.255.255.0" push "dhcp-option WINS 10.0.0.5" push "dhcp-option DNS 10.0.0.5" push "dhcp-option DOMAIN acme.com.local" keepalive 10 120 comp-lzo max-clients 1 persist-key persist-tun status openvpn-status.log verb 3 LArry.ovpn client proto udp dev tun remote doublel.hopto.org 1194 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client1.crt key client1.key comp-lzo verb 3 dev tun local 206.162.148.9 remote 134.28.54.2 ifconfig 192.168.99.1 192.168.99.2 route 10.0.0.0 255.0.0.0 192.168.99.2 I just need a simple vpn for one user. Am I headed down the right path? Thanks, Larry

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• Redmine subversion won't ignore certificate error even if told

  - by Pekka

  I have set up a copy of Redmine through the Bitnami Redmine Stack and am having trouble accessing a remote SVN repository through https. The trouble seems to be related to the fact that I don't have a signed certificate, and the certificate provided doesn't match the host name (I am accessing the same server through a number of host names). I am new to Ruby, Mongrel, Rails and Redmine. Following the advice in this forum thread, I changed the path Redmine uses to invoke the svn client in \apps\redmine\lib\ redmine\scm\adapters\subversion_adapter.rb from SVN_BIN = "svn" to SVN_BIN = "svn --trust-server-cert --non-interactive --config-dir c:/user/temp" I was hoping that the --trust-server-cert option would fix the certificate problem. However, I am still getting the following error message in mongrel.log: svn: OPTIONS of 'https://server.xyz:8443/svn/reponame': Server certificate verification failed: certificate issued for a different hostname, issuer is not trusted (https://server.xyz:8443) Does anybody know what to do about this? Additional info: I re-started the mongrel service after each change I am sure the configuration change has taken effect because subversion has created a full configuration directory in c:\user\temp I can access the remote repository using command line svn no problem The remote repository runs on a Windows box with VisualSVN

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• File transfer problems through VPN when Cisco IPS is enabled

  - by Richard West

  We have a Cisco ASA 5510 firewall with the IPS module installed. We have a customer that we must connect to via VPN to their network to exchange files via FTP. We use the Cisco VPN client (version 5.0.01.0600) on our local workstations, which are behind the firewall and subject to the IPS. The VPN client is successful in connecting to the remote site. However when we start the FTP file transfer we are able to upload only 150K to 200K of data, then everything stops. A minute later the VPN session is dropped. I think I have isolated this to an IPS issue by temporarily disabling the Service Policy on the ASA for the IPS with the following command: access-list IPS line 1 extended permit ip 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 inactive After this command was issued I then established the VPN to the remote site and was successful in transferring the entire file. While still connected to the VPN and FTP session I issued the command to enable the IPS: access-list IPS line 1 extended permit ip 0.0.0.0 0.0.0.0 0.0.0.0 0.0.0.0 The file transfer was tried again and was once again successful so I closed the FTP session and reopened it, while keeping the same VPN session open. This file transfer was also successful. This told me that nothing with the FTP programs was being filtered or causing the problem. Furthermore, we use FTP to exchange files with many sites everyday without issue. I then disconnected the original VPN session, which was established when the access-list was inactive, and reconnected the VPN session, now with the access-list active. After starting the FTP transfer the file stopped after 150K. To me this seems like the IPS is blocking, or somehow interfering with the initial VPN setup to the remote site. This only started happening last week after the latest IPS signature updates were applied (sig version 407.0). Our previous sig version was 95 days old becuase the system was not auto updating itself. Any ideas on what could be causing this problem?

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• Is it possible to play multiple audio streams from one "jukebox" to multiple Airport Express devices?

  - by Alex Reynolds

  I have set up a Mac mini as a jukebox that streams audio to an Airport Express in another room in the house, using the AirPlay/AirTunes feature in iTunes. I control this with the iOS Remote app, and this works great. At the present time, it looks like the Mac mini's copy of iTunes gets taken over by the Remote app, while streaming. If I set up a second Airport Express in room B, is there a way to set it up (as well as the jukebox) so that it can receive and play its own unique music stream ("stream B"), separate from what's going on at the Mac mini, or in room A, which is playing stream A? To accomplish this, I would be happy to buy a copy of Rogue Amoeba's AirFoil if it will allow sending multiple, separate audio streams from one computer to the multiple wireless bridges, while using the Remote app (or a Rogue Amoeba equivalent for iOS). However, it is unclear to me from their site documentation, whether that is possible or not. I'd prefer to give the points to an answer that solves this problem. If you don't know if it can be done, or do not think it can be done, please allow others to answer. I appreciate your help. Thanks for your advice.

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• 'pskill \\hostname winlogon' might budge a server "stuck rebooting", but why?

  - by Snoi

  Question: Executing remote (Sysinternals) command... pskill \\machine winlogon ...can budge a server that is stuck rebooting, but how/why does this work? How do you know which service to kill? To recreate (e.g.): You run Windows Update, allow a reboot, and ...NOTHING! RDP gets cut off but the server does not reboot. Just about every other service seems to stay up. Further Background: I've faced this problem on VMs hosted around the planet for some years, and used various sc.exe and shutdown commands to learn the state of and attempt remote reboot of servers in such a state, with limited success. Most datacentres don't offer any way to see the true console or power off/on such machines. They charge $$ for you to call them to do such simple things after hours, when you nearly always have to run your maint tasks. e.g. NET USE \\machine\IPC$ /USER:login password sc \\machine query RpcSs sc \\machine query TermService sc \\machine query wuauserv tasklist /s machine This occasionally works for me... shutdown /m \\machine /r /f /t: 0 ...but more often than not it fails with: A system shutdown is in progress (1115). I found this question, and the answer by @Tweek, and it worked really well, but was I just lucky? Can not RDP to Win 2003 box or initiate remote restart @Tweek said to run: pskill \\hostname winlogon ...and that got me past this situation in a new way (Server 2008 R2 in my most recent case) - really useful! I just need to understand if I got lucky or there is more science here. What I'd like to know is why the winlogon process? @Livne said to use "tasklist /s HostName" to see what is the culprit, but how do you tell from the listed output? It's just a list of running tasks etc. From that I would not know what to look for, nor could I see anything about the winlogon process that suggested to my eyes that was the one to kill.

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• MaxStartups and MaxSessions configurations parameter for ssh connections?

  - by Webby

  I am copying the files from machineB and machineC into machineA as I am running my below shell script on machineA. If the files is not there in machineB then it should be there in machineC for sure so I will try copying the files from machineB first, if it is not there in machineB then I will try copying the same files from machineC. I am copying the files in parallel using GNU Parallel library and it is working fine. Currently I am copying 10 files in parallel. Below is my shell script which I have - #!/bin/bash export PRIMARY=/test01/primary export SECONDARY=/test02/secondary readonly FILERS_LOCATION=(machineB machineC) export FILERS_LOCATION_1=${FILERS_LOCATION[0]} export FILERS_LOCATION_2=${FILERS_LOCATION[1]} PRIMARY_PARTITION=(550 274 2 546 278) # this will have more file numbers SECONDARY_PARTITION=(1643 1103 1372 1096 1369 1568) # this will have more file numbers export dir3=/testing/snapshot/20140103 find "$PRIMARY" -mindepth 1 -delete find "$SECONDARY" -mindepth 1 -delete do_Copy() { el=$1 PRIMSEC=$2 scp david@$FILERS_LOCATION_1:$dir3/new_weekly_2014_"$el"_200003_5.data $PRIMSEC/. || scp david@$FILERS_LOCATION_2:$dir3/new_weekly_2014_"$el"_200003_5.data $PRIMSEC/. } export -f do_Copy parallel --retries 10 -j 10 do_Copy {} $PRIMARY ::: "${PRIMARY_PARTITION[@]}" & parallel --retries 10 -j 10 do_Copy {} $SECONDARY ::: "${SECONDARY_PARTITION[@]}" & wait echo "All files copied." Problem Statement:- With the above script at some point I am getting this exception - ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host And I guess the error is typically caused by too many ssh/scp starting at the same time. That leads me to believe /etc/ssh/sshd_config:MaxStartups and MaxSessions is set too low. But my question is on which server it is pretty low? machineB and machineC or machineA? And on what machines I need to increase the number? On machineA this is what I can find - root@machineA:/home/david# grep MaxStartups /etc/ssh/sshd_config #MaxStartups 10:30:60 root@machineA:/home/david# grep MaxSessions /etc/ssh/sshd_config And on machineB and machineC this is what I can find - [root@machineB ~]$ grep MaxStartups /etc/ssh/sshd_config #MaxStartups 10 [root@machineB ~]$ grep MaxSessions /etc/ssh/sshd_config #MaxSessions 10

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• Windows 2008 RemoteAPP client disconnects within a matter of minutes

  - by Jeroen Wilke

  I'm having an odd problem with Windows 2008 TS, and remote applications specifically. The situation is as follows: TS idle timeout is disabled via GPO TS terminating disconnected sessions after 1hr (via GPO) My users can log on to the Terminal server, and get a full desktop, OR via rdp files that give access to a few remote applications. When a user connects to a full desktop, everything is fine and dandy, they will remain logged on indefinately, and when they disconnect the session is terminated after an hour. however, when a user connects using a remote application link, the client seems to disconnect after only a few minutes of inactivity, when you click the window, the session reconnects. EventID's on TS server: 4779: This event is generated when a user disconnects from an existing Terminal Services session, or when a user switches away from an existing destop using Fast User Switching. 4778 : This event is generated when a user reconnects to an existing Terminal Services session, or when a user switches to an existing desktop using Fast User Switching users are connecting directly to 3389, not using a TS-gateway at the moment. This behavior is consistent on different clients that we have, Full desktop is fine, RemoteAPP constantly disconnects. The .rdp file used doesn't list any interesting parameters, aside from what application to launch, and where to find it. Can someone explain to me how there can be a difference in behaviour between full desktop, and remoteapp ? since essentially they use the exact same client ? Regards Jeroen

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• How to remove strict RSA key checking in SSH and what's the problem here?

  - by setatakahashi

  I have a Linux server that whenever I connect it shows me the message that changed the SSH host key: $ ssh root@host1 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that the RSA host key has just been changed. The fingerprint for the RSA key sent by the remote host is 93:a2:1b:1c:5f:3e:68:47:bf:79:56:52:f0:ec:03:6b. Please contact your system administrator. Add correct host key in /home/emerson/.ssh/known_hosts to get rid of this message. Offending key in /home/emerson/.ssh/known_hosts:377 RSA host key for host1 has changed and you have requested strict checking. Host key verification failed. It keeps me for a very few seconds logged in and then it closes the connection. host1:~/.ssh # Read from remote host host1: Connection reset by peer Connection to host1 closed. Does anyone know what's happening and what I could do to solve this problem?

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• linked-server sql - access

  - by user22121

  Hi, I have a SQL server 2000 and an Access database mdb connected by Linked server on the other hand I have a program in c # that updates data in a SQL table (Users) based data base access. When running my program returns the following error message: OLE DB provider 'Microsoft.Jet.OLEDB.4.0' reported an error. Authentication failed. [OLE / DB provider returned message: Can not start the application. Missing information file of the working group or is opened exclusively by another user.] OLE DB error trace [OLE / DB Provider 'Microsoft.Jet.OLEDB.4.0' IDBInitialize:: Initialize returned 0x80040E4D: Authentication failed.] . Both the program, the sql server and database access are on a remote server. On the local server the problem was solved by running the following: "sp_addlinkedsrvlogin 'ActSC', 'false', NULL, 'admin', NULL". Try on the remote server the next, without result: "sp_addlinkedsrvlogin 'ActSC', true, null, 'user', 'pass'". On the remote server and from the "Query Analyzer" sql update statements are working correctly. Can you think of what may be the problem? Thanks!

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• Enabling WinRM by Group Policy

  - by SaintNick

  I'm having partial success enabling WinRM through Active Directory GPO's on our Server 2008 R2 environment. I've created a GPO that enables "Allow automatic configuration of listeners" and also enables all the necessary predefined WinRM Firewall rules. This GPO works fine for our webservers. Indeed, this is reflected by the "Server Manager Remote Management" nicely flipping to "enabled" in Server Manager Server Summary. However, the same GPO applied to both our Management servers, which are Domain Controllers, does not give the same result. I see the GPO settings being applied, including the listener as confirmed by C:\Windows\system32>winrm e winrm/config/listener Listener [Source="GPO"] Address = * Transport = HTTP Port = 5985 Hostname Enabled = true URLPrefix = wsman CertificateThumbprint ListeningOn = 10.32.40.210, 10.32.40.211, 10.32.40.212 But in Server Manager, Server Summary, Remote Management remains on "disabled" and indeed when trying to connect to one of these machines Server Manager gives an "Access Denied". Manually enabling WinRM locally via Server Manager "Configure Server Manager Remote Management" on either of these machines works fine. What can be the cause? Can it have something to do with theses machines being DC's and needing extra settings in the GPO? Nick Reid

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• Server taking too long to respond error

  - by DCJones

  This is my first post on serverFault and my first entry in to web server configuration. The hardware and software. CPU: GenuineIntel, Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz OS: Linux 2.6.18-128.el5 Memory: 2Gb Background. I am running a small database (MySQL), around 1000 records with each record containing 44 fields. At the start of each day “00:01” the tables are cleared and populated with fresh data. The are 10 remote PCs all running Winodws XP and Firefox internet browser. All remote PC’s are connected to the internet using a min 4Gb broadband connection. Each remote PC runs a URL which displays a dynamic page of data which is refreshed every 20 seconds. This is a continual process 24 hours a day. I problem I am having is on odd occasions throughout the day the PC browser error with “Server taking too long to respond error”. What I am trying to find our is if I have the correct setting in the httpd.conf file on the server. Any help or advice anyone can provide would be very helpful. Best regards Dereck Server config file: httpd.conf ServerRoot "/etc/httpd" PidFile run/httpd.pid Timeout 120 KeepAlive On MaxKeepAliveRequests 200 KeepAliveTimeout 5 <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 256 MaxClients 254 MaxRequestsPerChild 4000 </IfModule> <IfModule worker.c> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 150 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule>

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• How to collect the performance data of a server during an unreachable/down period using Nagios?

  - by gsc-frank

  Some time services and host stop responding due to a poor server performance. I mean, if for some reason (could be lot of concurrency services access, a expensive backup execution on the server or whatever that consume tons of server resources) a server performance is very degraded, that could lead that the server isn't capable to establish any "normal network communication" (without trigger whatever standards timeouts defined for such communication). Knowing host's performance data (cpu, memory, ...) in case of available during that period (host is not down and despite of its performance degradation still allow plugins collect performance data) could be very useful for sysadmin to try to determine what cause the problem, or at least, if the host performance was good and don't interfered at all in the host/service down. This problem could be solved using remote active (NRPE) or remote passive (NSCA) if such remote solutions could store (buffered) perf data to be send to central Nagios server when host performance or network outage allow it. I read the doc of both solutions and can't find any reference to such buffer mechanism neither what happened in case that NSCA can't reach Nagios server. Any idea of how solve this lack of info? so useful for forensic analysis. EDIT: My questions isn about which tools I can use to debug perf problems or gather perf data to analysis, but is about how collect (using Nagios) host perf data even during a network outage for its posterior analysis (kind of forensic analysis). The idea is integrate such data to Nagios graphers like pnp4nagios and NagiosGrapther. I know that I could install tools like Cacti in each of my host, and have a kind of performance data collection redundancy, but I really want avoid that and try to solve all perf analysis requirements with one tools: Nagios

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• sql developer cannot establish connection to oracle db with listener running

  - by lostinthebits

  I am working from home and connected to my work's vpn. I have tried to connect to the work db with sql developer (the latest version and the previous version) on the following environments: mac os x 10.8.5 (with sql developer launched and installed directly on the iMac. sql developer launched and installed directly on a vm on same computer (guest Ubuntu 12.04 LTS) sql developer launched and installed directly on a vm on same computer (guest Windows 7.0 Professional) I get Status Failure Test Failed : IO Error - The Network Adapter could not establish the connection. I have read dba forums and googled and the most common suggestion is that the oracle listener is not up and running. I can conclusively say this is not the case because I have the option of using remote desktop and accessing the oracle db in question on my work computer. If the listener was down, according to my DBA, no one would be able to connect. My sysadmin and dba are stumped so I assume it is something unique to my home system. The reason I do not want to continue with the remote desktop workaround is because remote desktop has an annoying (infuriating often) lag.

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• 554 - Sending MTA’s poor reputation

  - by Phil Wilks

  I am running an email server on 77.245.64.44 and have recently started to have problems with remote delivery of emails sent using this server. Only about 5% of recipients are rejecting the emails, but they all share the following common message... Remote host said: 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. As far as I can tell my server is not on any blacklists, and it is set up correctly (the reverse DNS checks out and so on). I'm not even sure what the "Sending MTA" is, but I assume it's my server. If anyone could shed any light on this I'd really appreciate it! Here's the full bounce message... Could not deliver message to the following recipient(s): Failed Recipient: [email protected] Reason: Remote host said: 554 Your access to this mail system has been rejected due to the sending MTA's poor reputation. If you believe that this failure is in error, please contact the intended recipient via alternate means. -- The header and top 20 lines of the message follows -- Received: from 79-79-156-160.dynamic.dsl.as9105.com [79.79.156.160] by mail.fruityemail.com with SMTP; Thu, 3 Sep 2009 18:15:44 +0100 From: "Phil Wilks" To: Subject: Test Date: Thu, 3 Sep 2009 18:16:10 +0100 Organization: Fruity Solutions Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_01C2_01CA2CC2.9D9585A0" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: Acosujo9LId787jBSpS3xifcdmCF5Q== Content-Language: en-gb x-cr-hashedpuzzle: ADYN AzTI BO8c BsNW Cqg/ D10y E0H4 GYjP HZkV Hc9t ICru JPj7 Jd7O Jo7Q JtF2 KVjt;1;YwBoAGEAcgBsAG8AdAB0AGUALgBoAHUAbgB0AC0AZwByAHUAYgBiAGUAQABzAHUAbgBkAGEAeQAtAHQAaQBtAGUAcwAuAGMAbwAuAHUAawA=;Sosha1_v1;7;{F78BB28B-407A-4F86-A12E-7858EB212295};cABoAGkAbABAAGYAcgB1AGkAdAB5AHMAbwBsAHUAdABpAG8AbgBzAC4AYwBvAG0A;Thu, 03 Sep 2009 17:16:08 GMT;VABlAHMAdAA= x-cr-puzzleid: {F78BB28B-407A-4F86-A12E-7858EB212295} This is a multipart message in MIME format. ------=_NextPart_000_01C2_01CA2CC2.9D9585A0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit

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• GRE Tunnel over IPsec with Loopback

  - by Alek

  I'm having a really hard time trying to estabilish a VPN connection using a GRE over IPsec tunnel. The problem is that it involves some sort of "loopback" connection which I don't understand -- let alone be able to configure --, and the only help I could find is related to configuring Cisco routers. My network is composed of a router and a single host running Debian Linux. My task is to create a GRE tunnel over an IPsec infrastructure, which is particularly intended to route multicast traffic between my network, which I am allowed to configure, and a remote network, for which I only bear a form containing some setup information (IP addresses and phase information for IPsec). For now it suffices to estabilish a communication between this single host and the remote network, but in the future it will be desirable for the traffic to be routed to other machines on my network. As I said this GRE tunnel involves a "loopback" connection which I have no idea of how to configure. From my previous understanding, a loopback connection is simply a local pseudo-device used mostly for testing purposes, but in this context it might be something more specific that I do not have the knowledge of. I have managed to properly estabilish the IPsec communication using racoon and ipsec-tools, and I believe I'm familiar with the creation of tunnels and addition of addresses to interfaces using ip, so the focus is on the GRE step. The worst part is that the remote peers do not respond to ping requests and the debugging of the general setup is very difficult due to the encrypted nature of the traffic. There are two pairs of IP addresses involved: one pair for the GRE tunnel peer-to-peer connection and one pair for the "loopback" part. There is also an IP range involved, which is supposed to be the final IP addresses for the hosts inside the VPN. My question is: how (or if) can this setup be done? Do I need some special software or another daemon, or does the Linux kernel handle every aspect of the GRE/IPsec tunneling? Please inform me if any extra information could be useful. Any help is greatly appreciated.

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• Windows 2008 RemoteAPP client disconnects within a matter of minutes.

  - by Jeroen Wilke

  I'm having an odd problem with Windows 2008 TS, and remote applications specifically. The situation is as follows: TS idle timeout is disabled via GPO TS terminating disconnected sessions after 1hr (via GPO) My users can log on to the Terminal server, and get a full desktop, OR via rdp files that give access to a few remote applications. When a user connects to a full desktop, everything is fine and dandy, they will remain logged on indefinately, and when they disconnect the session is terminated after an hour. however, when a user connects using a remote application link, the client seems to disconnect after only a few minutes of inactivity, when you click the window, the session reconnects. EventID's on TS server: 4779: This event is generated when a user disconnects from an existing Terminal Services session, or when a user switches away from an existing destop using Fast User Switching. 4778 : This event is generated when a user reconnects to an existing Terminal Services session, or when a user switches to an existing desktop using Fast User Switching users are connecting directly to 3389, not using a TS-gateway at the moment. This behavior is consistent on different clients that we have, Full desktop is fine, RemoteAPP constantly disconnects. The .rdp file used doesn't list any interesting parameters, aside from what application to launch, and where to find it. Can someone explain to me how there can be a difference in behaviour between full desktop, and remoteapp ? since essentially they use the exact same client ? Regards Jeroen

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• VPN Trunk Between Cisco ASA 5520 and DrayTek Vigor 2930

  - by David Heggie

  I'm a bit of a VPN newbie, so please go easy on me ... I'm trying to use the VPN trunking capabilities of the DrayTek Vigor 2930 firewall to bond two IPSec VPN connections to a Cisco ASA 5520 device and I'm getting myself tied in knots and hope someone here with more knowledge / experience can help. I have a remote site with two ADSL connections and the DrayTek box. The main office site has the Cisco ASA device. I am able to setup a single IPSec connection between the two sites on either of the ADSL connections' public IP addresses, but as soon as I try to use the VPN bonding, nothing works. The VPN tunnels are both still up, but the traffic is getting lost somewhere. I suspect it's due to the ASA not knowing how to route the traffic back over the VPN - one minute, traffic from my remote office's network is coming from public ip address #1, the next it's coming from public address #2 and it doesn't know what to do. Well, that's my newbie impression of what's going wrong, but I don't really know: If this is really what's happening If what I'm trying to do (bond two VPN connections from a single remote network to improve the bandwidth / resiliency) is possible with the kit I've got Could anyone help?

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• VPN Error 691 but server says authenticated on server

  - by Andy

  Hello all, I have a problem with a vpn connection on Windows XP SP3 that appears to be related to an account (maybe privilleges or an option that I have missed). When connecting using my account, which is a domain administrator account it will connect to through the vpn fine. However, using an account created for another person they receive Error 691: Username or Password is not valid for this domain. On the domain controller (windows 2003) I see a logon successful message: User DOMAIN\user was granted access. Fully-Qualified-User-Name = int.company.net.au/People/Management/User NAS-IP-Address = 10.30.0.3 NAS-Identifier = not present Client-Friendly-Name = MelbourneCore Client-IP-Address = Router-ip Calling-Station-Identifier = not present NAS-Port-Type = Virtual NAS-Port = 77 Proxy-Policy-Name = Use Windows authentication for all users Authentication-Provider = Windows Authentication-Server = undetermined Policy-Name = Remote VPN Access Authentication-Type = MS-CHAPv1 EAP-Type = Does anyone have any ideas as to where else I should look for finding a solution? If i use the wrong password it gives a logon failure error in the event viewer. Also removing them from the remote access group gives a logon failure error. Nothing appears in the event viewer on the local machine. In the past all that is required is to add them into our Remote Access Users group. Any help?

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• Cisco ASA 5505: Force NAT before IPsec?

  - by WuckaChucka

  I'm trying to route public-to-public IPs over an IPSec tunnel. However, the src IP is not "interesting" to the Cisco's IPSec engine because it doesn't appear to be getting translated to the outside IP before being evaluated by the Cisco's IPSec engine. From WEST to EAST, my public-to-public IPSec works fine: I can make a request from 192.168.0.5:any to 200.200.200.200:80 because the Vyatta does the NAT translation before the IPSec tunnel inspects the traffic, so the remote-subnet and local-subnet matches (see below). However from EAST to WEST, I see a deny in my Cisco logging buffer for Deny tcp src inside:192.168.1.5/59195 dst outside:100.100.100.100/80 which leads me to believe that the IPSec engine is not matching the encrypt_acl because the address has not been translated yet. Any ideas? WEST (Vyatta): inside: 192.168.0.0/24 inside host: 192.168.0.5/24 outside: 100.100.100.100 IPSec local-subnet: 100.100.100.100/32 IPSec remote-subnet: 200.200.200.200/32 EAST (Cisco): inside: 192.168.1.0/24 inside host: 192.168.1.5/24 (DNAT'ed on port 80 to outside) outside: 200.200.200.200 IPSec local-subnet: 200.200.200.200/32 IPSec remote-subnet: 100.100.100.100/32

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• nginx connection pool race condition?

  - by wlf

  I have a shared hosting server with high traffic. I have a lightweight apache mod_proxy for static content that from time to time has a "504 proxy error" problem proxing to apache/mod_php. Error log says: error reading status line from remote server 127.0.0.1:8080 Error reading from remote server returned by / This is what the apache documentation says about it. proxy-initial-not-pooled If this variable is set no pooled connection will be reused if the client connection is an initial connection. This avoids the "proxy: error reading status line from remote server" error message caused by the race condition that the backend server closed the pooled connection after the connection check by the proxy and before data sent by the proxy reached the backend. It has to be kept in mind that setting this variable downgrades performance, especially with HTTP/1.0 clients. I am really concerned about this downgrade in performance therefore I started to look at nginx immediately. I am new to nginx and time is crucial right now, I can't afford to waste days to study it just to find out there is the same race condition issue. Is nginx affected by this connection pool race condition? Thanks

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