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  • Linux wireless disconnect every 20 minutes

    - by james
    My laptop uses CentOS 6.3 with kernel 2.6.32-279.el6.x86_64. My wireless adaptor is Intel Corporation Centrino Wireless-N 1000. My wireless connection always get off after about 20 minutes. The network applet shows the connection is still on with good signal strength, but I just cannot load any web pages even the configuration page of the wireless router. The problem will continue until I disable and reconnect the wireless. Other devices like my cell phone uses the same wireless network without the problem. Even yesterday I'm using the same laptop with Fedora 17 without this problem. I also searched the internet and someone said running services NetworkManager and network simultaneously may be a problem. But I cannot stop any one of them because: if I stop network and start NetworkManager, the network service will start automatically; if I stop NetworkManager and run network, it says "Device does not seem to be present, delaying initialization." when trying to bringing on the wireless. What shall I do to get rid of the problem? Thank you very much!

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  • Which VPN-Software for Road-Worriors

    - by Phoibe
    Hello, I am using Unix (Debian) as my server platform and want to configure the following: A remote user can connect to a secure VPN server and use its IP to access the Internet, mostly for browsing and e-mail. I read a lot about OpenS/WAN+L2PT and OpenVPN but I am still confused how I should configure it. I would prefer IPSec+PPTP/L2PT since the road warrior doesn't have to install any extra software on iPhone/Windows7. Is there a good how-to for IPSec or what would you suggest?

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  • How to configure Windows user accounts for ODBC network with NT authentication?

    - by Ian Mackinnon
    I'm trying to create a connection to an SQL Server database from the ODBC Data Source Administrator using "Windows NT authentication using the network login ID". Both server and client are running Windows XP. It appears that any account with administrator privileges can add the data source on the server*, though connection attempts from the client result in error messages that suggest it is trying to authenticate using a guest account. I found a Microsoft support page that says: For SQL Server...: connect using the impersonated user account. But it doesn't offer advice about how to do that. How do I impersonate a user account on the server? or (since it sounds like that would lead to an unfortuante squashing of privileges and loss of accountability): How do I give an account on the client privileges on the server database and then ensure the client attempts authentication with the privileged account and not with a guest account? I'm aware that I'm providing rather sparse information. This is because I'm in unfamiliar territory and don't know what's pertinent. I'll attempt to add any requested information as quickly as possible. *I'm planning on tightening privileges straight after I get it working as it stands.

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  • Manual NAT on Checkpoint (Redirect all http requests to a local web server)

    - by B. Kulakli
    We have a proxy server in our internal network and I want to redirect all internet http requests to a web server in local network. It'll be like a Network Billboard that says "No direct connection is available. Set up your proxy etc." For example: A user starts the computer Opens the browser Tries to open www.google.com Should see web server output on local network Tries another web site on internet Should see web server output on local network Sets up proxy Tries to connect to a web site Web site should be loaded I have added a simple manual NAT rule to address translation in Checkpoint firewall but it simply does not work. Here is my address translation rule Source Destination Service T.Source T.Destination T.Service MY_PC A_GOOGLE_IP ALL ORIGINAL INT_WEB_SRV ORIGINAL Then when I ping A_GOOGLE_IP, replies come from INT_WEB_SRV, as I expected. However, when I try to connect A_GOOGLE_IP from browser (http://A_GOOGLE_IP), no replies come from SYN_SENT and falls into timeout. When I look at the firewall log of INT_WEB_SRV, I can see the incoming connection requests from MY_PC is accepted and NO denies. By the way, there is no problem to see INT_WEB_SRV (http://INT_WEB_SRV) from browser. My understanding is, my NAT rule at checkpoint NGX R60 does not include return packets. I definitely need some help.

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  • monitoring services, CPU, memory remotely on a Windows server machine

    - by ToastMan
    I'm looking for a tool that is able to (remotely) monitor CPU and Memory in a Windows server but most importantly, which service/process is using it. Or-- is it possible to monitor a specific running service? We got a server that freezes on regular basis and we're trying to find the culprit without using a local debugger. Would be great if the monitoring software came with an agent that we can install on the remote clients for maximum accuracy. Any suggestions are very much appreciated.

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  • Backing up my data causes my server to crash using Symantec Backup Exec 12, or How I Came to Loathe Irony

    - by Kyle Noland
    I have a Dell PowerEdge 2850 running Windows Server 2003. It is the primary file server for one of my clients. I have another server also running Windows Server 2003 that acts as the core media server for Symantec Backup Exec 12. I recently upgraded from Backup Exec 11d to 12. This upgrade was necessary because we also just upgraded from Exchange 2003 to Exchange 2007. After the upgrade I had to push-install the new version 12 Backup Exec Remote Agents to each of the servers I am backing up (about 6 total). 5 of my servers are doing just fine, faithfully completing backups every night. My file server routinely crashes. Observations: When the server crashes, it does not blue screen, it just locks up completely. Even the mouse is unresponsive. If you leave the server locked up long enough, it will eventually reboot itself and hang on the Windows splash screen. There is absolutely zero useful Event Viewer evidence of a problem. The logs go from routine logging to an Unexplained Shutdown Event the next morning when I have to hard reset the server to get it to boot. 90% of the time the server does not boot cleanly, it hangs on the Windows splash screen. I don't have any light to shed here. When the server hangs all I can do is hard reset it and try again. Even after a successful boot and chkdsk /r operation, if you reboot the machine, you have a 90% chance it won't back up again cleanly. The back story: This server started crashing during nightly backups about a month ago. I tried everything I could think of to troubleshoot the problem and eventually had to give up because I could not keep coming to the office at 4 AM to try to get the server back online. One Friday I got lucky and the server stayed up for its entire full backup. I took this opportunity to restore the full backup to a temporary server I set up and switched all my users to the temporary. Then I reloaded the ailing file server. I kept all my users on the temporary file server for about 3 weeks. I installed the same Backup Exec Remote Agent and Trend Micro A/V client on the temporary server that I was using on the regular file server. During this time, I had absolutely no problems backing up the temporary server. I tested the reloaded file server extensively. I rebooted the server once an hour every day for 3 weeks trying to make it fail. It never did. I felt confident that the reload was the answer to my problems. I moved all of the data from the temporary server back to the regular server. I got 3 nightly backups out of it before it locked up again and started the familiar failure to boot cleanly behavior. This weekend I decided to monitor the file server through the entire backup job. I RDPd into the file server and also into the server running Backup Exec. On the file server I opened the Task Manager so I could view the processes and watch CPU and memory usage. Everything was running smoothly for about 60GB worth of backup. Then I noticed that the byte count of the backup job in Backup Exec had stopped progressing. I looked back over at my RDP session into the file server, and I was getting real time updates about CPU and memory usage still - both nearly 0%, which is unusual. Backups usually hover around 40% usage for the duration of the backup job. Let me reiterate this point: The screen was refreshing and I was getting real time Task Manager updates - until I clicked on the Start menu. The screen went black and the server locked up. In truth, I think the server had already locked up, the video card just hadn't figured it out yet. I went back into my bag of trick: driving to the office and hard reseting the server over and over again when it hangs up at the Windows splash screen. I did this for 2 hours without getting a successful boot. I started panicking because I did not have a decent backup to use to get everything back onto the working temporary file server. Once I exhausted everything I knew to do, I took a deep breath, booted to the Windows Server 2003 CD and performed a repair installation of Windows. The server came back up fine, with all of my data intact. I can now reboot the server at will and it will come back up cleanly. The problem is that I'm afraid as soon as I try to back that data up again I will back at square one. So let me sum things up: Here is what I've done so far to troubleshoot this server: Deleted and recreated the RAID 5 sets. Initialized the drives. Reloaded the server with a fresh Server 2003 install. Confirmed with Dell that I have installed the latest, Dell approved BIOS and NIC drivers. Uninstalled / reinstalled the Backup Exec Remote Agent. Uninstalled the Trend Micro A/V client. Configured the server not to reboot itself after a blue screen so I can see any stop error. I used to think the server was blue screening, but since I enabled this setting I now know that the server just completely locks up. Run chkdsk /r from the Windows Recovery Console. Several errors were found and corrected, but did not help my problem. Help confirm or deny the following assumptions: There are two problems at work here. Why the server is locking up in the first place, and why the server won't boot cleanly after a lockup. This is ultimately a software problem. The server works fine and can be rebooted cleanly all day long - until the first lockup - following a fresh OS load or even a Repair installation. This is not a problem with Backup Exec in general. All of my other servers back up just fine. For the record, all of the other servers run Server 2003, and some of them house more data than the file server in question here. Any help is appreciated. The irony is almost too much to bear. Backing up my data is what is jeopardizing it.

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  • "must issue a starttls command first" when MSSQL emails via Microsoft Online

    - by David
    I have written a stored procedure in MSSQL Server 2008 R2 which sends emails when my Application logs errors. It works fine on servers at our office but when I ran it on our remote servers I got must issue a starttls command first So maybe there is a setting somewhere which is different between the two servers, and that's why it's working on one and not the other. How do I set the server so that it issues a "starttls commaned first"?

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  • ssh connectivity issue

    - by achal tomar
    I have a CentOS 5.5 server hosted in a remote data center. I usually access this server from a Red Hat Enterprise Linux 5 server using the ssh command. Now my organization has implemented a proxy server, this is not allowing me to connect to the VPS server. I see the following error using the command root@<ip address>:-: ssh: connect to host <ip address> PORT 22: connection refused. Can anybody help me with this issue?

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  • Some emails are being delivered, some returned

    - by Tom Broucke
    I have my own VPS where a site is running (control panel: directadmin). When I send mails, some are being delivered (hotmail, gmail, [email protected] ,...), others are not ([email protected]), others are delivered after being greylisted ([email protected]). /var/log/exim/mainlog What could be the cause of this? Is the problem Sender-Side or Receiver-Side? case 1: [email protected] (delivered) 2012-06-20 15:02:03 1ShKXr-0005Sc-7g <= [email protected] U=apache P=local S=1319 T="Password reset" from <[email protected]> for [email protected] 2012-06-20 15:02:03 1ShKXr-0005Sc-7g gmail-smtp-in-v4v6.l.google.com [2a00:1450:8005::1b] Network is unreachable 2012-06-20 15:02:03 1ShKXr-0005Sc-7g => [email protected] F=<[email protected]> R=lookuphost T=remote_smtp S=1355 H=gmail-smtp-in-v4v6.l.google.com [173.194.67.27] X=TLSv1:RC4-SHA:128 C="250 2.0.0 OK 1340196103 cp4si34336466wib.14" 2012-06-20 15:02:03 1ShKXr-0005Sc-7g Completed case 2: [email protected] (not being delivered) 2012-06-21 09:57:14 1ShcGQ-0007No-5H <= [email protected] H=localhost ([91.230.245.141]) [127.0.0.1] P=esmtpa A=login:[email protected] S=740 [email protected] T="hey" from <[email protected]> for [email protected] 2012-06-21 09:57:14 1ShcGQ-0007No-5H ** [email protected] F=<[email protected]> R=virtual_aliases: 2012-06-21 09:57:14 1ShcGQ-0007Nt-7Z <= <> R=1ShcGQ-0007No-5H U=mail P=local S=1546 T="Mail delivery failed: returning message to sender" from <> for [email protected] 2012-06-21 09:57:14 1ShcGQ-0007No-5H Completed 2012-06-21 09:57:14 1ShcGQ-0007Nt-7Z => info <[email protected]> F=<> R=virtual_user T=virtual_localdelivery S=1643 2012-06-21 09:57:14 1ShcGQ-0007Nt-7Z Completed case 3: [email protected] (greylisted) 2012-06-21 15:29:02 1ShhRW-000862-BV <= [email protected] H=localhost ([91.230.245.141]) [127.0.0.1] P=esmtpa A=login:[email protected] S=782 [email protected] T="testmail squirrel" from <[email protected]> for [email protected] 2012-06-21 15:29:02 1ShhRW-000862-BV SMTP error from remote mail server after RCPT TO:<[email protected]>: host mx-cluster-b1.one.com [195.47.247.194]: 450 4.7.1 <[email protected]>: Recipient address rejected: Greylisted for 5 minutes 2012-06-21 15:29:02 1ShhRW-000862-BV == [email protected] R=lookuphost T=remote_smtp defer (-44): SMTP error from remote mail server after RCPT TO:<[email protected]>: host mx-cluster-b2.one.com [195.47.247.195]: 450 4.7.1 <[email protected]>: Recipient address rejected: Greylisted for 5 minutes Notice that the "from" in case1 differs in case2: [email protected] or [email protected]. Thanks for your time!

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  • I want to use OpenVPN to access the web and email from China. How?

    - by gaoshan88
    My question: How do I use my already existing OpenVPN setup to enable secure, remote web surfing and email checking from open wireless hotspots? Some long winded details: I am running Ubuntu and have OpenVPN up and working fine as a server. My client machine connects fine as well. However, that just gets me a secure connection to my home network. What I want is to be able to access my VPN server and surf the web or check email securely from anywhere with an open wireless connection. I am frequently in China and having secure, unblocked access would be a boon (especially since I like to work from tea houses and coffee shops and I've already had a password sniffed and hacked once). I already know how to tunnel over SSH via a SOCKS proxy using something like: ssh -ND 8887 -p 22 [email protected] but since I have OpenVPN I figure why not try it? So... what are the steps involved in making it so I can connect to my VPN and the surf and check mail to my hearts content (slowly to be sure but at least it wold be secure). Thx!

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  • Having problems VPN'ing into our Windows server network.

    - by Pure.Krome
    Hi folks, When two people (on their notebooks) try to VPN to our office, only the first user gets a connection. the second user always times out. Is it possible for VPN to allow two or more people, using / sharing the same EXTERNAL PUBLIC IP to connect/authenticate? Now for some specifics (cause those two statements are very broad). I'm not in the IT Dept. I'm a developer. Our IT Dept don't really care (sigh) so it's up to me to fix this crap. Our office is all Microsoft shop stuff - servers and clients. We also have a firewall (watchguard brand?) and some other crazy setups (yes i know, it's very vague :( ). So i'm wondering - is it possible for multiple users, from the same public IP, to connect via VPN to a windows server? i'm under the impression - yes. But it is possible that this only happens when the clients (who are all behind the single, public IP .. otherwise they will have their OWN ip's) need to have UPnP running or something? this is killing me and i need to start asking the right questions cause these guys don't know what they are doing and i can't work without this happening. I know this is a vauge question with so many 'if-what's-etc' but maybe some questions/suggestions from you guys might start to lead to solving this problem. EDIT: Network Connection: WAN Miniport (PPTP)

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  • Virtualbox port forwarding with iptables

    - by jverdeyen
    I'm using a virtualmachine (virtualbox) as mailserver. The host is an Ubuntu 12.04 and the guest is an Ubuntu 10.04 system. At first I forwarded port 25 to 2550 on the host and added a port forward rule in VirtualBox from 2550 to 25 on the guest. This works for all ports needed for the mailserver. The guest has a host only connection and a NAT (with the port-forwarding). My mailserver was receiving and sending mail properly. But all connections are comming from the virtualbox internal ip, so every host connection is allowed, and that's not what I want. So.. I'm trying to skip the VirtualBox forwarding part and just forward port 25 to my host only ip of the guest system. I used these rules: iptables -F iptables -P INPUT ACCEPT iptables -P OUTPUT ACCEPT iptables -P FORWARD ACCEPT iptables -t nat -P PREROUTING ACCEPT iptables -t nat -P POSTROUTING ACCEPT iptables -A INPUT --protocol tcp --dport 25 -j ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -s 192.168.99.0/24 -i vboxnet0 -j ACCEPT echo 1 > /proc/sys/net/ipv4/ip_forward iptables -t nat -A PREROUTING -p tcp -i eth0 -d xxx.host.ip.xxx --dport 25 -j DNAT --to 192.168.99.105:25 iptables -A FORWARD -s 192.168.99.0/24 -i vboxnet0 -p tcp --dport 25 -j ACCEPT iptables -t nat -A POSTROUTING -s 192.168.99.0 -o eth0 -j MASQUERADE iptables -L -n But after these changes I still can't connect with a simple telnet. (Which was possible with my first solution). The guest machine doesn't have any firewall. I only have one network interface on the host (eth0) and a host interface (vboxnet0). Any suggestions? Or should I go back to my old solution (which I don't really like). Edit: bridge mode isn't an option, I have only on IP available for the moment. Thanks!

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  • What ports does Management Studio use to connect to SQL Server (2005)

    - by Martin
    I have SQL Server 2005 operating on a remotely hosted server and wish to access it from my own machine using management studio The firewall on the remote server is allready setup to allow all traffic from my external IP - and that works great. However I have a load balancing router that has a second line attached to it - unfortunatly the second line has a dynamic external IP. I need to therefore set up a rule in the router to always send data from Management studio on the first line - but I need to know the port numbers. Can you advise?

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  • good, simple music streaming for windows?

    - by The Journeyman geek
    I've been using itunes to stream music over lan, and quite frankly the quality is terrible. On the other hand, its ease of use - having a simple client on either end, and it just 'working' with full control on my end is nice- the quality however is terrible - I'm wondering if there's any controllable streaming remote music serve for windows that will let me pick the bitrate it sends at, or uses whatever bitrate the original file is in, and just sends it, and has itself controllable at the client end, and will work acceptably over a wlan connection

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  • Juniper router dropping pings to external interface

    - by Alexander Garden
    My organization has a Juniper SSG20-WLAN that routes our traffic to the outside world. We've been having intermittent problems with our internet connection so I wrote up a Python script to ping the internal interface of the router, the external interface, a couple of our internal servers, the ISP router our router talks to, their upstream provider, and Google and Yahoo for good measure. It does that about every minute. What I have found is that when our internet goes out, our Juniper router ceases responding to pings on the external interface. Everything past that is, of course, unreachable. The internal interface and our internal servers continue to echo back without interruption. None of the counters indicate dropped packets of any type. They all look normal. The logs complain about VIP servers being unavailable but otherwise nothing indicative of network issues. My questions are these: Does this exonerate our ISP? Or, contrawise, might a problem with the connection be causing the external interface to go down? Is there somewhere else in the SSG20, beside the system log and counters, that might help me track down info on the problem? UPDATE: Turned out that one of the switches between my monitoring box and the router was a router itself, and occasionally diverting from the gateway to itself. Kudos to those who made suggestions along those lines. Not really sure which answer to mark as accepted, as it was really stuff in the comments that turned out to be right. Thanks for the suggestions.

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  • Using cURL through SSH tunnel or VPN

    - by Andrew
    Hello, I would like to set my CURL to use SSH tunneling for certain domains. How can I accomplish that? I can also set up VPN or SOCKS or whatever, but I need to use CURL on local machine, but use the IP of remote machine for those connections.

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  • am i properly setting this up correctly? [closed]

    - by codrgii
    i'm having a problem with mod_security. I have installed it, but i am not sure on how to make the rules for it, i want the rules to prevent all major attacks like cross site scripting, remote file inclusion etc i'm using mod security 2.6.5, apache 2.2 with php 5.3.10. i went to this site http://www.gotroot.com/mod_security+rules but i am not sure how to set up the rules or which one to use, or how i add them properly in httpd.conf, would someone please explain the process and also recommend rules for someone in my position?

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  • Looking to get a small server – need web, PHP, PostgreSQL.

    - by Javawag
    Hi all! I'm looking to get a cheap (low end) server to serve web pages (xHTML/PHP), but I also need to be able to set up PostGreSQL on the system too. Ideally the server would have low power consumption, run Linux (I prefer Mac OS X but a Mac Mini, although the size I'm looking for, is too much money!) and be around £100 (~$160US). EDIT: Just to make it clearer, I'm looking to purchase the server hardware myself – but I want something about Mac Mini sized. I don't want to pay for hosting! Also, quick question – if it's to serve web pages from my home (standard ISP connection, no static IP!), what do I need in place to get this working. I'm guessing I would sign up with some service like no-ip, and register a domain to point to my no-ip address (then install the no-ip software on the server to update that with the current IP). I know the idea of running a server behind a normal ISP connection isn't very elegant, but I'd prefer to have the server where I can see it then pay over the odds for a hosting service where I have little to no control over what happens. Also, I could write my own server software for apps/etc to connect to as well. Anyways I'm rambling! What do you guys think?! Javawag

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  • Why is IIS 7.5 seeing some requests as HTTP/1.0?

    - by Zhaph - Ben Duguid
    While trying to work out why Static File Compression wasn't working on one of our IIS servers, the error was coming back as "NO_COMPRESSION_10" which translates to: Server not configured to compress 1.0 requests Looking at the requests in Fiddler, I can see that I'm requesting HTTP 1.1, but everything is being sent back as HTTP 1.0: Request (from chrome, captured via Fiddler): GET /css/reset.css HTTP/1.1 Host: [-----].com Connection: keep-alive Cache-Control: max-age=0 If-Modified-Since: Tue, 16 Oct 2012 15:04:34 GMT User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.95 Safari/537.11 Accept: text/css,*/*;q=0.1 Referer: http://[-----].com/ Accept-Encoding: gzip,deflate,sdch Accept-Language: en-GB,en;q=0.8,en-US;q=0.6 Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3 Response from IIS: HTTP/1.0 200 OK Cache-Control: no-cache, no-store Pragma: no-cache Content-Type: text/html; charset=utf-8 Expires: -1 Server: Microsoft-IIS/7.5 X-AspNet-Version: 4.0.30319 X-Powered-By: ASP.NET Date: Tue, 11 Dec 2012 11:57:03 GMT Connection: close Content-Length: 108837 Other servers with the same host that I'm running this site on all respond with HTTP/1.1. How can I persuade IIS to respond with HTTP/1.1 rather than HTTP/1.0? Edit to add: Digging deeper, I can see that some responses from the server are indeed being returned compressed, so I guess really I'm trying to work out why talking to this particular server from our office seems to result in it seeing 1.0 requests, while other servers at the same co-loc don't?

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  • Route return traffic to correct gateway depending on service

    - by Marnix van Valen
    On my office network I have two internet connections and one CentOS server running a website (HTTPS on port 443). The website should be publicly accessible through the public IP of the first internet connection (ISP-1). The other internet connection, ISP-2, id the default gateway on the network. Both internet connections have routers (the household-kind) with NAT, SPI firewalls etc. The router on ISP-2 is a Netgear WNDR3700 (aka N600) with original firmware. The problem is that the website is unreachable. Looks like incoming traffic on ISP-1 will reach the server but the returning traffic is routed through ISP-2, effectively making the site unreachable. As far as I can tell I can't do port based routing on the WNDR3700. What are my options to make this work? I've been looking at implementing an iptables / routing based solution on the server itself but haven't been able to make that work. Update: Note that the server has one network interface connecting it to both routers.

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  • How to use Massren with Vim?

    - by Remonn
    I want to use massren renamer in vim in order to rename files within the texteditor. First, I used this command within Vim to set Vim as default editor for massren :! c:\tools\massren_renamer\massren.exe --config editor "C:\Progra~2\Vim\vim74\gvim.exe --remote-silent-tab" Then I tried to change a number of text files with this command within Vim: :%! c:\tools\massren_renamer\massren.exe d:\t*.txt but the list of files doesn't open at all in Vim. What did I wrong?

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  • Windows Server 2008 ignores any change made to firewall

    - by Maurice Courtois
    I have been trying for the last 2 hours to make my Windows Server 2008 answer ping. I have tried almost every single solution I have found on the web, so far nothing work. My current setup: 2 NIC (1x Internet connection, 1x Local network) Server act as VPN server. So I set the corresponding NIC as either Public or Private. I also enable the rule for "File and Printer Sharing (Echo Request...)" for all Nic and from any IPs. I always been able to ping from the local network or the local ip while connected to the VPN. I also tried to create a specific rule for ICMP ping and disabling the firewall for all but the public nic. Regardless of all this, I still can't ping that server from Internet. Any idea suggestion what could cause this? I have the impression that when you set the server as VPN (I switch the box on when setting it up to block everything else than VPN connection) that changing anything to the firewall setting thought mmc is pointless !?!?

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