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  • Unable to ping domain.local, but can ping server.domain.local

    - by Force Flow
    I have a single windows 2008 server running active directory, group policy, and DNS. DHCP is running from the firewall (this is because there are multiple branch locations, and each location has its own firewall supplying DHCP. But, for this problem, the server and workstation are at the same location). On an XP workstation, if I try to visit \\domain.local or ping domain.local, the workstation can't find it. A ping returns Ping request could not find host domain.local. If I try to visit \\server or \\server.domain.local or ping server or server.domain.local, I'm able to connect normally. If I ping or visit domain.local on the server, I'm able to connect normally. A-Records are in place in the DNS service for server, domain.local, and server.domain.local. A reverse lookup zone also is enabled and PTR records are in place. If I wait 20-30 minutes, I am eventually able to ping and visit domain.local--but, when attempting to ping, it takes 30 second to return an IP address. I am also unable to join a new workstation to the domain during this wait period. If I try, the error message returned is "network path not found". Is there something I'm missing?

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  • SQL Server 2008 second instance times out when logging in -- but only the first time?

    - by Kromey
    This is a strange one that has plagued me for a while now. When logging in to the second instance of SQL Server 2008 on one of our database servers, we get a timeout error: Cannot connect to servername\mssqlserver2. Additional information: Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. (Microsoft SQL Server)") (This is the error message when trying to connect with Microsoft SQL Server Management Studio; other tools experience the same error, but of course say it in different ways.) Immediately re-attempting to log in works just fine, so whatever the cause it's ephemeral! This happens regardless of user or authentication type (both Windows and SQL Server authentication methods are supported on this instance). What's even weirder, though, is that the first instance on this server has never once demonstrated this problem. Server is a Windows Server 2008 R2 virtual server, hosted in Microsoft Hyper-V (host is likewise Server 2008 R2). The server has 2GB of RAM, and seems to regularly be using 90% of that -- could low memory be the cause of this issue? I could see this second instance -- which is not used very often yet -- being swapped out to disk, and then taking too long to load back into memory to respond in time to the connection request, but I'd rather have more than just my own hunch before I go scheduling a downtime for this server (the first instance is used regularly) and then just throwing extra resources at it in the blind hope that the problem goes away.

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  • PFSense VPN Routing

    - by SvrGuy
    We use PFSense firewalls at three installations with the following LAN networks: 1.) Datacenter #1: 10.0.0.0/16 2.) Datacenter #2: 10.1.0.0/16 3.) HQ: 10.2.0.0/16 All of these locations are linked via an IPSEC tunnel that works properly. Hosts in any of the above networks can communicate with hosts in any other of the above networks. Now, for our laptops etc. we established a road warrior network 10.3.0.0/16 and have implemented OpenVPN to link the laptops etc. to Datacenter #1. This works great too, so our laptops can connect and communicate with any host in Datacenter #1 (anything on 10.0.0.0/16) The problem is the laptops can't communicate with any hosts that Datacenter #1 can reach by its IPSEC tunnel to Datacenter #2 (and/or the HQ for that matter). Does anyone know what to do configuration wise on the PFSense box in Datacenter #1 to configure to route packets received on the OpenVPN tunnel to Datacenter #2 over the IPSEC tunnel? It could be a setting on the OpenVPN or some sort of static route or some such. Any ideas?

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  • Spammer relaying via Postfix mail server

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

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  • VirtualBox problems writing to shared folders (Guest Additions installed)

    - by vincent
    I am trying to setup a shared folder from the host (ubuntu 10.10) to mount on a virtualized CentOS 5.5 with Guest Additions (4.0.0) installed (Guest addition features are working ie. seamless mode etc.). I am able to successfully mount the share with: mount -t vboxsf -o rw,exec,uid=48,gid=48 sf_html /var/www/html/ (uid and guid belong to the apache user/group) the only problem is that once mounted and I try to write/create directories and files I get the following: mkdir: cannot create directory `/var/www/html/test': Protocol error I am using the proprietary version of VirtualBox version 4.0.0 r69151. Has anyone had the same problem and been able to fix it or has any idea how to potentially fix this? Another question, the reason for setting this up is this. Our production servers are on CentOS 5.5 however I am a great fan of Ubuntu and would like to develop on Ubuntu rather than CentOS. However in order to stay as close to the production environment I would like to virtualize CentOS to use a web server and use the shared folder as web root. Anyone know whether this isn't a good idea? Has anyone successfully been able to set this up? Thanks guys, your help is always much appreciated and if you need any more information please let me know.

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  • Linux DHCPD Mac-Address based Groups

    - by GruffTech
    Our Current DHCPD.conf looks like the following. subnet 10.0.32.0 netmask 255.255.255.0 { range 10.0.32.100 10.0.32.254; option subnet-mask 255.255.255.0; option broadcast-address 10.0.32.255; option domain-name-servers 208.67.222.222,208.67.220.220; option routers 10.0.32.5; host Dev-ABaird-W { hardware ethernet 00:1D:09:3E:49:13; fixed-address 10.0.32.94; } ... more static hosts .... } About as basic as it gets. The old router is 10.0.32.1, our company wanted to implement a squid proxy to better monitor web traffic while at work, and if necessary block large time-wasters, IE Facebook.com. However, we've quickly realized that this change has played a mean prank on our Polycom SIP Phones. Occasionally our phones will not ring, the end recipient hears ringing (this is artificially created by our PBX) however the handset never rings. The ONLY thing that has changed in our network is the option routers line. So, Since all Polycom MAC addresses begin with 00:04:F2 would it be possible in DHCP to say any 00:04:F2:::* MAC addresses get option routers 10.0.32.1, and anything else must talk with our Gateway?

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  • windows clients cannot get dns resolution until you open and close ipv4 properties page

    - by GC78
    This strange problem has started recently. Some windows clients cannot seem to get dns resolution to the internet after boot, and sometimes again at some point in the day. Internal hosts are also slow to resolve. trying to ping an interal host by name will take a long time for the hostname to resolve to ip address and trying to ping a website by name will fail to resolve. If you go into the tcp/ip v4 properties and view but not change anything, ok/close out of that then the client starts working fine, hostnames will resolve quickly. I have seen this happen on both Vista and W7 clients. ipconfig /all at a client experiencing this problem shows everything in order. proper ip addr, gateway, dns server, dns suffix ect.. ipconfig /dnsflush will not fix them, neither will /release and /renew the clients get their ip address, mask and dns server info from either one of 2 OES dhcp servers that assign addresses in different scopes in the same subnet. the internal dns server is a different OES dns server the default gateway is not assigned by the OES server but is statically put in at the client (only for those who need to get to the Internet for their job) flat network topology What can I do to get to the bottom of this? It only happens to a few of the client machines and typically the same ones. It started happening when we made a change to one of the DHCP scopes in iManager. Strangly this problem only happens to clients that get an IP address from the scope that we didn't make any changes to.

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  • Verify client certificate CN in Tomcat(APR)

    - by Petter
    I'm running a tomcat installation with the APR libraries installed (with the OpenSSL HTTPS stack that comes with it). What I'm trying to do is to lock a specific HTTPS connector down to users of a specific certificate. Adding client certificate verification is no issue, but I can't get it to validate against a specific Common name only. I was perhaps a bit naïve and thought the mod_ssl attribute SSLRequire typically used in Apache Httpd would work, but that property is not recognized by the Tomcat implementation. (http://tomcat.apache.org/tomcat-7.0-doc/config/http.html#SSL%20Support points to some mod_ssl docs, but the Tomcat implementation does not seem to cover all aspects of mod_ssl). I can get this to work by using the Java version of the connector instead of APR (losing some performance) and just add a trust store with that one certificate in it. However, using openssl without the SSLRequire expressions, I'm not sure how to do this with Tomcat7 (on Windows if that matters). <Connector protocol="HTTP/1.1" port="443" maxThreads="150" scheme="https" secure="true" SSLEnabled="true" SSLCertificateFile="mycert.pem" SSLCertificateKeyFile="privkey.pem" SSLCACertificateFile="CABundle.pem" SSLVerifyClient="require" SSLProtocol="TLSv1" SSLRequire="(%{SSL_CLIENT_S_DN_CN} eq &quot;host.example.com&quot;)"/> Can you suggest a way to make this work using Tomcat/APR/OpenSSL?

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  • MS licensing of multiple RDP sessions for non-MS products in Windows XP Pro

    - by vgv8
    Question 1) and 2) were moved into separate thread Which Windows remote connections bypass LSA? and what r definitions of login vs. logon session? 3) Do I understand correctly that multiple remote RDP sessions are supported by Windows XP but require additional (or modified) licensing? Which one? Or it is always illegal to run multiple RDP sessions on Windows XP? even through non-MS commercial software? ---------- Update1: I already understood my error - the main questions were about definitions (important to find the common language with others) and the licensing questions were collateral - but it was already answered. I shall try to separate these questions leaving here the questions about RDp licensing and migrating other questions into separate thread ---------- Update2: Trying to "work around" licensing terms is pointless and wasteful of time I never try "working around" and I never ask anything like this, I am not specialist in licensing. My clients/employers provide me with tools and licensing support. They have corporate lawyers, planning/accounting/purchase departments for these issues. The questions that I ask is the matter of scalability and efficiency (saving my and others time) in my developing work. For ex., Just because I need autentication against Windows AD it is time-saving to use ADAM instead of deploying full-fledged AD with DC + servers + whatever else? Nobody is forcing you to use Windows XP I shall not rush into re-installing all my operating systems on all my development machines (at home, at client premises) just because a few guys have a lot of fun downvoting development-related questions in serverfault.com. If I do so, I make a joker from me in the eyes of my clolleagues et al Update: I unmarked this question as answered since it had not even adressed the question, at least mine. Should I understand that Terminal Server PRO, allowing Windows® XP and Windows® Small Business Server 2003 to host multiple remote desktop sessions, is illegal? Related: My answer to question Has windows XP support multiple remote login session (RDP) at a time?

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  • How to fix Apache from crashing with PHP+Curl on an SSH request?

    - by Jason Cohen
    My Apache process segfaults whenever I call curl_exec() from PHP with an "https://" URL. If I use http instead of https as the URL transport, it works perfectly, so I know curl and the other curl options are correct. I can use curl from the command-line on that server using the https version of the URL and it works perfectly, so I know the remote server is responding correctly, the cert isn't expired, etc.. My server is: Linux 2.6.32-21-server #32-Ubuntu SMP Fri Apr 16 09:17:34 UTC 2010 x86_64 GNU/Linux My Apache version is: Server version: Apache/2.2.14 (Ubuntu) Server built: Apr 13 2010 20:21:26 My PHP version is: PHP 5.3.2-1ubuntu4.2 with Suhosin-Patch (cli) (built: May 13 2010 20:03:45) Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies My PHP curl module info is: cURL support => enabled cURL Information => 7.19.7 Age => 3 Features AsynchDNS => No Debug => No GSS-Negotiate => Yes IDN => Yes IPv6 => Yes Largefile => Yes NTLM => Yes SPNEGO => No SSL => Yes SSPI => No krb4 => No libz => Yes CharConv => No Protocols => tftp, ftp, telnet, dict, ldap, ldaps, http, file, https, ftps Host => x86_64-pc-linux-gnu SSL Version => OpenSSL/0.9.8k ZLib Version => 1.2.3.3

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  • Error upgrading Ubuntu server from Intrepid to Jaunty

    - by Martin
    I'm trying to upgrade an old ubuntu server from 8.10 (Intrepid) to 9.04 (Jaunty). But it fails. root@server1:/# do-release-upgrade Checking for a new ubuntu release Failed Upgrade tool signature Failed Upgrade tool Done downloading extracting 'jaunty.tar.gz' Failed to extract Extracting the upgrade failed. There may be a problem with the network or with the server. Does anyone have an idea why I get this error and how to fix it? UPDATE: I think i might have tracked the problem down. My /etc/update-manager/meta-release looks like this: [METARELEASE] URI = http://changelogs.ubuntu.com/meta-release URI_LTS = http://changelogs.ubuntu.com/meta-release-lts URI_UNSTABLE_POSTFIX = -development URI_PROPOSED_POSTFIX = -proposed If i go to http://changelogs.ubuntu.com/meta-release it has this info for Jaunty: Dist: jaunty Name: Jaunty Jackalope Version: 9.04 Date: Thu, 23 Apr 2009 12:00:00 UTC Supported: 0 Description: This is the 9.04 release Release-File: http://archive.ubuntu.com/ubuntu/dists/jaunty/Release ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/jaunty-proposed/main/dist-upgrader-all/0.111.8/jaunty.tar.gz UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/jaunty-proposed/main/dist-upgrader-all/0.111.8/jaunty.tar.gz.gpg Those links starting with archive.ubuntu.com are broken since jaunty is EOL. I guess i could fix this by copying this file, replacing "archive" with "old-releases", host the modified file somewhere and change the url in the meta-release file. Is this a good solution or will it make me run into worse problems?

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  • How to get a higher resolution on Ubuntu 11.04 using an intel chipset

    - by Saif Bechan
    I have a bit slow PC here, so I decided to put Ubuntu 11.04 on it. It use to run Windows Vista on a resolution of 1280x1024, so both my hardware and monitor support it. Now I'm on Ubuntu, but can only run 1024x768, and the screen is not that bright. Its like when you don't have the right drivers on a Windows machine. Now i'm new to linux, so I do not know what do do. I have an onboard Intel chipset i965. Maybe this is some useful information, I read something about it on a forum: lspci 00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 02) 00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express Integrated Graphics Controller (rev 02) 00:1b.0 Audio device: Intel Corporation N10/ICH 7 Family High Definition Audio Controller (rev 01) 00:1c.0 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 1 (rev 01) 00:1c.1 PCI bridge: Intel Corporation N10/ICH 7 Family PCI Express Port 2 (rev 01) 00:1d.0 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #1 (rev 01) 00:1d.1 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #2 (rev 01) 00:1d.2 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #3 (rev 01) 00:1d.3 USB Controller: Intel Corporation N10/ICH 7 Family USB UHCI Controller #4 (rev 01) 00:1d.7 USB Controller: Intel Corporation N10/ICH 7 Family USB2 EHCI Controller (rev 01) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01) 00:1f.2 IDE interface: Intel Corporation N10/ICH7 Family SATA IDE Controller (rev 01) 00:1f.3 SMBus: Intel Corporation N10/ICH 7 Family SMBus Controller (rev 01) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01) 03:03.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller (rev c0) Can someone please tell me how I can get the screen better? saif@sodium:~$ xrandr Screen 0: minimum 320 x 200, current 1024 x 768, maximum 4096 x 4096 VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9

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  • "Server Unavailable" and removed permissions on .NET sites after Windows Update [closed]

    - by andrewcameron
    Our company has five almost identical Windows 2003 servers with the same host, and all but one performed an automatic Windows Update last night without issue. The one that had problems, of course, was the one which hosts the majority of our sites. What the update appeared to do was cause the NETWORK user to stop having access to the .NET Framework 2.0 files, as the event log was complaining about not being able to open System.Web. This resulted in every .NET site on the server returning "Server Unavailable" as the App Domains failed to be initialise. I ran aspnet_regiis which didn't appear to fix the problem, so I ran FileMon which revealed that nobody but the Administrators group had access to any files in any of the website folders! After resetting the permissions, things appear to be fine. I was wondering if anyone had an idea of what could have caused this to go wrong? As I say, the four other servers updated without a problem. Are there any known issues involved with any of the following updates? My major suspect at the moment is the 3.5 update as all of the sites on the server are running in 3.5. Windows Server 2003 Update Rollup for ActiveX Killbits for Windows Server 2003 (KB960715) Windows Server 2003 Security Update for Internet Explorer 7 for Windows Server 2003 (KB960714) Windows Server 2003 Microsoft .NET Framework 3.5 Family Update (KB959209) x86 Windows Server 2003 Security Update for Windows Server 2003 (KB958687) Thanks for any light you can shed on this.

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  • Error importing large MySQL dump file which includes binary BLOBs in Windows

    - by Daniel Magliola
    I'm trying to import a MySQL dump file, which I got from my hosting company, into my Windows dev machine, and i'm running into problems. I'm importing this from the command line, and i'm getting a very weird error: ERROR 2005 (HY000) at line 3118: Unknown MySQL server host '+?*á±dÆ-N+Æ·h^ye"p-i+ Z+-$?P+Y.8+|?+l8/l¦¦î7æ¦X¦XE.ºG[ ;-ï?éµ?º+¦¦].?+f9d릦'+ÿG?-0à¡úè?-?ù??¥'+NÑ' (11004) I'm attaching the screenshot because i'm assuming the binary data will get lost... I'm not exactly sure what the problem is, but two potential issues are the size of the file (2 Gb) which is not insanely large, but it's not trivially small either, and the other is the fact that many of these tables have JPG images in them (which is why the file is 2Gb large, for the most part). Also, the dump was taken in a Linux machine and I'm importing this into Windows, not sure if that could add to the problems (I understand it shouldn't) Now, that binary garbage is why I think the images in the file might be a problem, but i've been able to import similar dumps from the same hosting company in the past, so i'm not sure what might be the issue. Also, trying to look into this file (and line 3118 in particular) is kind of impossible given its size (i'm not really handy with Linux command line tools like grep, sed, etc). The file might be corrupted, but i'm not exactly sure how to check it. What I downloaded was a .gz file, which I "tested" with WinRar and it says it looks OK (i'm assuming gz has some kind of CRC). If you can think of a better way to test it, I'd love to try that. Any ideas what could be going on / how to get past this error? I'm not very attached to the data in particular, since I just want this as a copy for dev, so if I have to lose a few records, i'm fine with that, as long as the schema remains perfectly sound. Thanks! Daniel

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  • Cannot connect to FTP sites anymore

    - by Wayne M
    I have the FTP service running on Server 2003, and I am hosting websites through Apache. I have users configured to point to certain directories on the server. I am using FileZilla to remote FTP, but it never seems to connect to the directory. The command window says: Command: USER wayne Response: 331 Password required for wayne Command: PASS: ***** Response: 230 User wayne logged in Status: Connected Status: Retrieving directory isting... Command: PWD Response: 257 "/wayne" is current directory Command: TYPE I Response: 200 Type set to I. Command: PASV And that's it. It doesn't display any directories at all, and the pane says "Not connected to any server". Sometimes it will display the folder, but nothing happens when I click on it to expand it. It was working fine, and I have another FTP server set up the same way that does work. How can I fix this? EDIT: I've tried changing it to Active FTP, and it says: Command: LIST Command: 150 Opening BINARY mode data connection for /bin/ls Response: 425 Can't open data connection. Error: Failed to retrieve directory listing. I also noticed that I'm not able to browse the site in IIS's management console anymore, it just shows a blank screen when I click on one of the names and says There are no items to show in this view, although the name has permissions to view the folder and everything. Could it be because I have the Web Publishing service disabled (as I'm not using IIS to host websites)? That shouldn't cause anything should it?

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  • Hosting websites in our Workplace custom-built datacentre

    - by i.h4d35
    I'm faced with unique learning opportunity at work at the moment. Due to the slowdown (amongst other reasons), the powers that be at my office have decided to abandon our shared hosting providers (both shared and dedicated hosting) and have decided to host the websites at our office's datacentre. We're running 7 websites, wherein the average unique hits per day at the moment is about 900. We have 2 servers set aside for this - one is a DELL POWER EDGE 1850 (Intel Xeon 3 GHZ*2, 4GB RAM, 73GB HDD and the other is an HP DL 380 G3 (Intel Xeon 2.8 GHz, 6 GB RAM, 73 GB HDD) a) I would like to know the pros and cons of going ahead with this project.All the sites will be hosted on a single IP. In all probability, the OS is going to be CentOS. b) Do you think I should consider Virtualization into this equation (KVM/Xen)? I was thinking in terms of separate instances of the DB server and the frontend though I do not know if this is the best way to go. c) Should I be trying to use cloud stacks like OpenStack and try to make it look like websites hosted on some sort of Public Cloud? (something that I checked out here). Here is something else I came across, which looks similar to what needs to be done at our office. About the websites - Of the 7 websites, 4 are basic static websites which basically gives a whole lot of information about a few local institutions. The remaining 3 are local product-based websites developed in PHP wherein end user can view products and order them online. I am trying to take this as a learning experience wherein I can learn to build something from scratch and save the company a little something in the process. The migration needs to be completed by Easter so I guess it gives us some time (or am I being overly optimistic??). I am confused here and would appreciate all the help I can get. Thanks in advance.

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  • Forcing a particular SSL protocol for an nginx proxying server

    - by vitch
    I am developing an application against a remote https web service. While developing I need to proxy requests from my local development server (running nginx on ubuntu) to the remote https web server. Here is the relevant nginx config: server { server_name project.dev; listen 443; ssl on; ssl_certificate /etc/nginx/ssl/server.crt; ssl_certificate_key /etc/nginx/ssl/server.key; location / { proxy_pass https://remote.server.com; proxy_set_header Host remote.server.com; proxy_redirect off; } } The problem is that the remote HTTPS server can only accept connections over SSLv3 as can be seen from the following openssl calls. Not working: $ openssl s_client -connect remote.server.com:443 CONNECTED(00000003) 139849073899168:error:140790E5:SSL routines:SSL23_WRITE:ssl handshake failure:s23_lib.c:177: --- no peer certificate available --- No client certificate CA names sent --- SSL handshake has read 0 bytes and written 226 bytes --- New, (NONE), Cipher is (NONE) Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE --- Working: $ openssl s_client -connect remote.server.com:443 -ssl3 CONNECTED(00000003) <snip> --- SSL handshake has read 1562 bytes and written 359 bytes --- New, TLSv1/SSLv3, Cipher is RC4-SHA Server public key is 1024 bit Secure Renegotiation IS NOT supported Compression: NONE Expansion: NONE SSL-Session: Protocol : SSLv3 Cipher : RC4-SHA <snip> With the current setup my nginx proxy gives a 502 Bad Gateway when I connect to it in a browser. Enabling debug in the error log I can see the message: [info] 1451#0: *16 peer closed connection in SSL handshake while SSL handshaking to upstream. I tried adding ssl_protocols SSLv3; to the nginx configuration but that didn't help. Does anyone know how I can set this up to work correctly?

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  • Dos/ Flood Lag even though Port not Saturated

    - by Asad Moeen
    My GameServers had been under some UDP Floods due to which they generated outputs to the attacker which gave the GameServers some huge lags. Thanks to friends at ServerFault that upon different kind of testing, I was able to successfully block the attack. My question is actually something else but it is important to know how the GameServers reacted to the attack and if the machine kept stable or not: 300kb/s Input would cause GameServer to generate 2mb/s Output. So as the Input Rate kept increasing, output rate would reach so high that it would no longer be possible for the GameServer to control it and hence it would give a huge Lag until the attack is stopped. Usually the game server starts to lag when it sends out something greater than 5mb/s and under that is controllable. Theoretically, I was able to receive a 60mb/s output from my GameServer on inputting 10mb/s. Its just the way the GameServer works if not protected. Now on some of my machines, only the GameServer under attack lagged and although the server was generating 60mb/s output, rest of the gameservers on other ports would run fine without lags on the same machine. But there was another machine which also runs on a 100 MBPS Network port, even 1 mbps input ( and ZERO output because attack is blocked ) even on an unused port would give a constant yellow line ( on the Lag-o-Meter ) to all the clients on all GameServers indicating lag because that line is actually blue under normal conditions. It would remain the same even on 50mbps or 900mbps input. I tried contacting the host about it because I believe its the way their Network is bridged, but they can't help me about it. Anyone else knowing about such issues because if 900mbps input does not Saturate the port, how can 1mbps input lag the servers although port is not saturated and enough bandwidth is available?

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  • Unstable DNS with bind

    - by yasser abd
    we have a Centos machine called jupiter, on which I have installed bind9, On every other machine the DNS is set to be the IP address of jupiter (192.168.2.101), as you can see in the output of the following command in windows >ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : mypcs Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Broadcom NetXtreme 57xx Gigabit Controller Physical Address. . . . . . . . . : 00-1A-A0-AC-E4-CC DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::c16d:3ae4:5907:30c4%8(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.2.98(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Thursday, September 20, 2012 10:26:11 AM Lease Expires . . . . . . . . . . : Sunday, September 23, 2012 10:26:10 AM Default Gateway . . . . . . . . . : 192.168.2.1 DHCP Server . . . . . . . . . . . : 192.168.2.1 DHCPv6 IAID . . . . . . . . . . . : 201333408 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-16-3A-50-01-00-1A-A0-AC-E4-CC DNS Servers . . . . . . . . . . . : 192.168.2.101 192.168.2.1 192.168.2.1 NetBIOS over Tcpip. . . . . . . . : Enabled All machines can always nslookup one of the domain (mydomain.com) that is set in the jupiter's DNS server, you can see that in the output of nslookup on the same windows machine: >nslookup mydomain.com Server: UnKnown Address: 192.168.2.101 Name: mydomain.com Address: 192.168.2.100 The problem is, sometimes mydomain.com can not be pinged, here is the output of the ping on the same windows machine >ping mydomain.com Ping request could not find host mydomain.com. Please check the name and try again. This looks very random, and happens once in a while, so the machine can lookup the DNS records but can't ping it, nor can browse the website that is hosted on mydomain.com, which should resolve to 192.168.2.100 On a linux machine that has the same DNS settings, the output of dig command for mydomain is as follows: $ dig mydomain.com ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.10.rc1.el6_3.2 <<>> mydomain.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36090 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1 ;; QUESTION SECTION: ;mydomain.com. IN A ;; ANSWER SECTION: mydomain.com. 86400 IN A 192.168.2.100 ;; AUTHORITY SECTION: mydomain.com. 86400 IN NS jupiter. ;; ADDITIONAL SECTION: jupiter. 86400 IN A 192.168.2.101 ;; Query time: 1 msec ;; SERVER: 192.168.2.101#53(192.168.2.101) ;; WHEN: Thu Sep 20 16:32:14 2012 ;; MSG SIZE rcvd: 83 We've never had the same problem on MACs, they always resolve mydomain.com Here is how I have defined mydomain.com on Bind9's configs on Jupiter, notice that the name of the machine on 192.168.2.100 is venus, so I have this file: /var/named/named.venus: $TTL 1D @ IN SOA jupiter. admin.ourcompany.com. ( 2003052800 ; serial 86400 ; refresh 300 ; retry 604800 ; expire 3600 ; minimum ) @ IN NS jupiter. @ IN A 192.168.2.100 * IN A 192.168.2.100 /var/named/zones/named.venus.zone zone "mydomain.com" IN {type master;file "/var/named/named.venus";allow-update {none;};}; One thing to note is that I haven't defined reverse DNS lookups, only the forward DNS lookups are defined in Bind9 configs, not sure if that's relevant or not. So my question is, why is this being so unstable? what could be the cause?

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  • DNS issue for internal website routing internet connection from remote location

    - by Michael Paul
    I have an issue that I could use some help with. Our company has a main location and a remote location. Previously, the remote location was connected to the main location through an internet connection VPN tunnel. The connection was pitifully slow at 1.5Mbps, so we upgraded it with a 75Mbps direct link. That meant the remote location lost it's internet access, so we routed their access through the main office internet connection. Everything works perfect except for one thing. The website we host is not accessible from the remote location unless the IP address is used. If I do NSLOOKUP on our website address from a machine connected to the main location network, it resolves correctly to the inside IP address. However, if I do the same from a remote location machine, it resolves to the website's outside IP address. Our internal DNS server(s) have a pointer and CNAME records set up, and everything was working perfectly before the connection was upgraded. In addition, the remote location has a domain controller, DNS server and DHCP server to service these requests at the remote location and prevent these requests from getting routed back and forth over the link. So I think was it happening is that for some reason the DNS server at the remote location is not resolving our website name correctly and passing the requests on to the routers, which then push the request out to the internet DNS system. That resolves the name to our external IP. This is purely a DNS issue, everything else works just fine. I am just stumped on this one. Any ideas on how to fix this? Edit: I forgot to mention that at the remote side of the link is a Cisco ASA-5505 and at the main office there is a Cisco ASA-5510. The link is connected between these 2 devices and the routing is handled in the 5510. Thanks, Michael

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  • How can I debug a port/connectivity issue?

    - by rfw21
    I am running a simple WebSocket server on Amazon EC2 (Fedora Core). I've opened the relevant port using ec2-authorize, and checked that it's opened. Iptables is definitely not running. However I can't connect to the port from outside EC2. I've tried the following (my server is running on port 7000): telnet ec2-public-dns.xx.xx.xx.amazon.com 7000 (from within EC2: connects fine) nmap localhost (output includes line: 7000/tcp open afs3-fileserver) telnet ec2-public-dns.xx.xx.xx.amazon.com 7000 (this time from my local machine: I get "connection refused: Unable to connect to remote host") The strange thing is this: if I start Nginx on port 7000 then it works and I can connect from outside EC2! And the WebSocket server fails on port 80, where Nginx works fine. To me this suggests a problem with the WebSocket server, BUT I can connect to it successfully from within EC2. (And it works fine on a different VPS account). How can I debug this further? If anybody can stop me tearing my hair out, I'd be very grateful indeed :)

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  • Exchange 2010 Hub cannot deliver to Exchange 2007 Hub - "451 5.7.3 Cannot achieve Exchange Server authentication"

    - by Graeme Donaldson
    We have an existing Exchange 2007 server in Site A (exch07). I've installed an Exchange 2010 server in Site B (exch10). Both servers have the CAS, Mailbox and Hub roles. Messages sent via SMTP on exch10 which are destined for mailboxes on exch07 are queued with the "Last Error" reported in Queue Viewer as '451 4.4.0 Primary target IP address responded with: "451 5.7.3 Cannot achieve Exchange Server authentication." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.' I've found that some people have resolved this by creating new Receive Connectors which are scoped specifically to apply to connections from the remote hub/s, but I have had no luck doing this. Specifically I created new receive connectors on both servers with the following settings: Remote IP = IP/s of remote server Authentication = "Transport Layer Security (TLS)" and "Exchange Server authentication" Permission Groups = "Exchange servers" and "Legacy Exchange Servers" This made no difference, I see the same error message. What am I missing? Update: We noticed that the Application log had this error message from MSExchangeTransportService: Microsoft Exchange could not find a certificate that contains the domain name exch07.domain.local in the personal store on the local computer. Therefore, it is unable to support the STARTTLS SMTP verb for the connector exch10 with a FQDN parameter of exch07.domain.local. If the connector's FQDN is not specified, the computer's FQDN is used. Verify the connector configuration and the installed certificates to make sure that there is a certificate with a domain name for that FQDN. If this certificate exists, run Enable-ExchangeCertificate -Services SMTP to make sure that the Microsoft Exchange Transport service has access to the certificate key. It turns out that the default self-signed certificate was no longer enabled for the SMTP service for some reason. After enabling the self-signed certificate for SMTP, we no longer get the error in the event logs, but delivery is still failing with the same error message. Update 2: I put a mailbox on exch10 and attempted to deliver a message via SMTP on exch07 and I get the same error.

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  • Win2008/IIS7/fx2.0 - 500.19 error

    - by Keith Barrows
    I installed new boxes at the beginning of the week. 1) Web Server on Win2008 x64, IIS 7 + all updates 2) DB Server on Win2008 x64, SQL 2008 Ent + all updates I configured my websites, set up host headers and DNS entries, worked through some problems on my handlers and finally got it all running Wednesday morning. Our team has been using it since then. This morning I came in and everyone of us is getting a 500 error. Error Summary HTTP Error 500.19 - Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid. Detailed Error Information Module IIS Web Core Notification Unknown Handler Not yet determined Error Code 0x80070005 Config Error Cannot read configuration file due to insufficient permissions Config File \?\C:\RivWorks\dev\web.config Requested URL http://dev.rivworks.com:80/login.aspx Physical Path Logon Method Not yet determined Logon User Not yet determined Config Source -1: 0: Links and More InformationThis error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error. I’ve gone through the KB articles, made sure IIS_IUSRS had read permissions and am now stumped. What bothers me is IIS is looking in \?\C:\ instead of just C:. What is happening? TIA

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  • check_snmp warning & critical thresholds with negative values

    - by Oesor
    I'm querying some signal level values measured in dBm, and the SNMP host on the remove device reports the values as negative values, ie, -90 dBm. However, check-snmp seems to be incapable of dealing with negative numbers as part of its threshold values. If I specify the values as part of a collection of OIDs, it accepts the syntax but converts the snmp value to positive, thus always generating a WARNING/CRITICAL result: root@ops-00:/usr/local/nagios/libexec# ./check_snmp -H 192.168.1.100 -o DEVICE-MIB::AverageReceiveSNR.0,DEVICE-MIB::CurrentNoiseFloor.0 -w 10:,~:-85 -c 15:,~:-80 -vvvv /usr/bin/snmpget -t 1 -r 5 -m ALL -v 1 [authpriv] 192.168.1.100:161 DEVICE-MIB::AverageReceiveSNR.0 DEVICE-MIB::CurrentNoiseFloor.0 DEVICE-MIB::AverageReceiveSNR.0 = INTEGER: 25 DEVICE-MIB::CurrentNoiseFloor.0 = INTEGER: -97 Processing line 1 oidname: DEVICE-MIB::AverageReceiveSNR.0 response: = INTEGER: 25 Processing line 2 oidname: DEVICE-MIB::CurrentNoiseFloor.0 response: = INTEGER: -97 SNMP CRITICAL - 25 *97* | DEVICE-MIB::AverageReceiveSNR.0=25 DEVICE-MIB::CurrentNoiseFloor.0=97 If I run it with a single OID, it gives me an error that the format is incorrect: root@ops-00:/usr/local/nagios/libexec# ./check_snmp -H 192.168.1.100 -o DEVICE-MIB::CurrentNoiseFloor.0 -w ~:-85 -c ~:-80 -vvvv Range format incorrect And if I run it with no thresholds defined, it works properly and returns the right value. This makes the graphs correct, however it'll never generate a notification when out of range: root@ops-00:/usr/local/nagios/libexec# ./check_snmp -H 192.168.1.100 -o DEVICE-MIB::CurrentNoiseFloor.0 -vvvv /usr/bin/snmpget -t 1 -r 5 -m ALL -v 1 [authpriv] 192.168.1.100:161 DEVICE-MIB::CurrentNoiseFloor.0 DEVICE-MIB::CurrentNoiseFloor.0 = INTEGER: -97 Processing line 1 oidname: DEVICE-MIB::CurrentNoiseFloor.0 response: = INTEGER: -97 SNMP OK - -97 | DEVICE-MIB::CurrentNoiseFloor.0=-97 What am I doing wrong here? How would I, for example, generate a CRITICAL when the noise floor is -80 dBm or higher, a WARNING when it's -85 to -80 dBm, and an OK when -85 dBm or lower? Do I have to write my own SNMP plugins when dealing with negative values?

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  • Why won't this script accept any arguments?

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

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