Servers :: Ubuntu 10.4 Server Stops Accepting Connections After A Period Of Time / Fix It?
Apr 24, 2011
I'm not sure if this belongs in the Server or Networking section of the forums. Anyway, last month I upgraded my server to Ubuntu 10.04 LTS. Since then, I've had a recurring problem wherein after a certain period of time, the server stops accepting network connections. Ubuntu 10 will continue to reject network connections until someone logs into the server locally, after which time network connectivity is restored and the cycle begins anew. Essentially, the server goes into a "half sleep mode". I say half because the computer is still on and the fans are running.
I've done some searching around various forms and initially figured this issue was related to problems with the Network Manager service (https://bugs.launchpad.net/ubuntu/lu...er/+bug/524454), so I removed the service altogether. However, this problem is still occurring.
I've poured over /var/log/messages and /var/log/syslog, but have noticed no irregular behavior. Has anyone else experienced this issues? I'd rather not resort to downgrading back to Gusty Gibbon if I can help it.
I am happy to provide more information if its needed
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Oct 2, 2010
I recently setup a new SUSE box for the purposes of acting as an ftp/sftp server. It's currently setup to run ProFTPD 1.3.3.rc3 and mod_sftp/0.9.7. The server has two internal network interfaces eth0 and eth1. eth0 is purely for internal use to accept ftp and ssh. eth1 is outward facing and receives connections from the WAN via SFTP over port 22. The problem I am facing is that after half hour to an hour eth1 stops accepting connections whenever there is no SSH connection present on eth0. I can't figure out why this is happening.
ProFTPD is setup as follows: SocketBindTight directive is on, default server and port are commented out.
[code]...
When the external interface is unreachable the proftpd and proftpd-sftp logs show no record of any connection attempt. I have noticed however if I leave eth0 down eth1 stays contactable without problem. Can anyone give me some pointers on what I can check to find out why this may be happening.
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Dec 9, 2010
I have run a small webserver from my home computer and I can access it fine from computers on my local network, but cannot access it from other networks. I see in wireshark that the traffic is arriving at the computer and I have checked the firewall logs on my computer and nothing is being blocked(I use iptables as a firewall), and I can't see any reason why it shouldn't be working.
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Aug 17, 2010
I have configured my postfix server to use TLS (STARTTLS) but with no certificates either on server or client. Here are the TLS parameters in main.cf.
=========
smtpd_tls_security_level = may
# Obsolete, but still supported
#smtpd_use_tls = yes
#smtp_use_tls = yes
[Code]....
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Oct 25, 2010
I did a clean install of OpenSuse 11.3 a couple of weekends back. Everything is working great except the SSH server.Once I installed ssh, it appears to accept my connection, allows me to log in, and then freezes Putty, not allowing me to type anything into the terminal.If I wait several minutes, I'll get a message saying that the connection was closed. After that, the server won't accept connections.Sometimes it'll start accepting connections again, but after a while, the connection will close on its own. Other times, I will be unable to get a connection until I restart the server.If you guys needs any more information, please let me know. What could be causing this odd behavior?
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Apr 21, 2011
I'm having an issue with a Samba server running on an Ubuntu "server". Technically, it's not a server, it's just an old desktop with Ubuntu 10.04 running it..and I have a few server processes running (ProFTP, Samba, etc.)The Ubuntu server is where I store all of my important files that get backed up to a separate hard drive. I shared folders via Samba, and I use two computers to access the shares. I access the shares with an .sh file I created that uses the mount cifs command to mount to those shares.
It has been working flawlessly for a long long time, up until recently. For the past few days to a week, I will try to mount the shares with no result. In the terminal, the commands just freeze, as if the command is trying to execute, but having network issues.The only way I can get it to work is if I reboot the Ubuntu server, then it maps flawlessly. But a day later, it's back to hanging up when trying to mount.
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May 24, 2011
We are using Red Hat linux 4 .We blocked certain sites through squid for certain ip address.we want to unblock these sites in particular interval ,ie during noon time and after 4.00 pm.
Here we have given
In the sites.txt we have given the names the of those sites that should be blocked
The problem is to unblock sites in sites.txt, for particular intervals
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Jul 14, 2010
I have ssh installed and running on my laptop(Debian Sequeeze). I can run "ssh localhost" without any problem. But for some reason I cannot connect to it from other computers. They all give "connection timed out". I can connect to these computers`s ssh servers but for some reason my laptop with Debian is not accepting any connections.
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Nov 30, 2010
I would like to know if a rule has been applied to the iptables.active file to accept direct connections on port 22 through an IP address, can I also add a mac address/addresses to the rules such that if I am not on the network with the accepting IP address, that my MAC address will still get me in?
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Mar 29, 2010
I have installed talk on centos, turned it on by editing xinetd.d/talk and setting disable=no.I have restarted xinetd (service xinetd restart) and verified that talk is configured to start (chkconfig --status-all).what am i missing? shouldn't either port 517 or 518 respond to telnet? what else can i do to get talk running?
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Jul 12, 2011
Having a problem with tftpd on CentOS 5.5. I am only able to download files from the localhost address.
I have checked iptables (by adding rules and by turning the firewall completely off -- nothing changes) and enabled tftpd logging (by adding -v to the server_args section in xinetd.d/tftp) and I DO see the request coming in, but no response from the daemon. I've also tried upping the verbosity by adding multiple -vs and/or --verbosity 10 to the mix, but all I ever see is the initial request come in, nothing more. I've even tried running the daemon in foreground mode with -L but I get no verbosity then.
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Jan 11, 2011
I installed linux 2010 mandriva on a (embeded) system,and i run several server programs on it that accept connections from clients. clients are connected to server(s) and every things is ok, but when i go to home and back to my work tomorrow, i see no data can be sent to server programs and this problem exists until i restart the server programs or reconnect tcp client programs. this problem occurs even when both client and server programs executed on the same (embeded) system.why this happens? i checked by netstat and see that server ports exists in the list(and not closed by kernel) but it seems kernel or an application above it prohibit data transmission.i changed the OS and installed ubuntu but the problem exists.
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May 12, 2010
I am running Ubuntu 9.10 on an Acer Aspire 5920 laptop. For the most part it works well, but it seems to occasionally become mostly unresponsive (~1 / 2days). I say mostly unresponsive because I can still move the mouse, but I do not seem to be able to click on anything (either to open or close programs or windows, or interact with menus). The keyboard is also partially responsive. When I use my keyboard shortcut to get access to the Applications menu, the menu highlights and depresses as though it is opening, but nothing appears on the screen. I can eventually press Ctrl+Alt+Del to start the shutdown procedure (and the shutdown screen pops up with the 60s countdown).
But I cannot use either the keyboard or the mouse to select another option (Restart, Suspend, Hibernate, or even Cancel), nor can I select the Shutdown option to cause it to shutdown right away - I just have to wait the sixty seconds for everything to turn off. This seems to happen no matter what I am doing with no warning - browsing the web, playing a game, or working on a document. The only consistent thing is it only seems to happen when I have more than one program open and I am trying to switch between open windows.
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Dec 16, 2010
I installed ubuntu 10.0.4 TLS version and my desktop freezes after a period of inactive time: the screen doesn't change and the apps do not response. It will resume after any key-stroke or mouse action. Is it a feature of 'power-saving' or something else? I need my ubuntu keep 'alive' all the time.
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Mar 16, 2011
Now i am writting one bash script. in that my requirement is i need to create one directory and that the directory details to be stored in one file Ex. date/time and all in one file. after that i need to delete the folder automatically exactly after 3months. between these time period in 2month itself i need to send one mail to admin "regarding this still one month only more to delete the folder" . is it possible to do like that date calculation in script.
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Feb 28, 2010
I just reinstalled, and can't get the setting set right so that my display does not shut off after a certain period of time. It is shutting off after a while of inactivity, and I do not want it to.
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Jul 18, 2011
I currently have fedora 15 installed along side windows 7 on my acer aspire d250. So far it runs great, however I was wondering if there is a way to make fedora 15 hibernate after being in suspend for a period of time, just like windows 7 does. This make sense to me as there is no point in wasting battery life if i can hibernate, but I don't want to hibernate all the time, just suspend for a period of time, like 2 hours, in case I need my netbook again i have quick access to it.
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Dec 6, 2010
I'm trying to block a site for a certain time.How to Block(deny) perticuler website in certain times of the day , by using squid ? and it seemed promising.I added the lines to my squid.conf
acl office_time time MTWHF 3:00-21:00
acl bad url_regex "/etc/squid/block.acl
http_access deny bad !office_time
created a block.acl in the same directory and restarted it.
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Mar 2, 2010
i want a service to be start at 8:00 and be ended in 14:00 automatically i already do this manualy by:
/etc/init.d/myservice.sh start
/etc/init.d/myservice.sh stop
i think it should be related to cron jobs.
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Jun 7, 2010
Im looking for an app pr line of code that could let me observe a process, save the info in a number of variable and then put the gathered info on a file.
Ive been trying with variations of top but no luck. I am running several CentOS virtual servers, VM is 2gb ram 2 processor.
Maybe a script that works over a specified amount of time while writing lines with the info on a text file so at the end i can have a sort of table with the data.
The thing is Im going to stress test the server and I would like to have the data to make some statistics.
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Jan 21, 2010
I skipped over Jaunty on my main desktop because Intrepid had been working perfectly for so long. Finally took the plunge to Karmic, and have had major instability problems. I cannot trace them to any particular program I am using. At first it seemed related to power management, since it would lock up every time it had a period of extended inactivity. I have disabled ACPI in my BIOS (I think), and any power management settings I could find in gnome to try to troubleshoot. That seems to have helped, but it still happens semi-regularly, sometimes when I am in the middle of using it. I have tried checking logs and googled anything that seemed important. ie a message in kern.log reads: Clocksource tsc unstable
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Mar 29, 2010
I have several file servers in our offices and I am relatively new to Ubuntu / Linux. I get notices that there are updates for the server software from time to time. Is it typical to update everything when available or should I follow "If it ain't broke, don't fix it..." mentality?I would hate for everything to be working fine and then have an update throw me a curve.
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May 2, 2011
I install Opensuse 11.4 on KDE environment then I changed to XFCE. I don't know how to configure for computer auto shutdown after a period of time don't use it.
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Feb 22, 2011
I am having some trouble with my opensuse 11.3 internet connection for two weeks. After a certain period connection drops while using both NetworkManager and ifup. For info, I write the outputs of some codes.
[Code]...
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Mar 3, 2010
I am running Karmic on my laptop, and I have three 1.5 TB external hard drives which I swap between frequently. My problem is that if I leave the drives in, and do not access them for a period of time, they become inaccessible, i.e. I will click on the icon on the desktop or in Places, and it will tell me there is no device mounted, even though I was using it fine just an hour before.
i have a feeling that it is because the USB drives spin down after a period, and Ubuntu detects them as being 'disconnected'. Would it help if I added individual entries for each in fstab?? Or do I need to adjust some settings elsewhere?
EDIT: If this information helps, the HD's are all Seagate Expansion drives, formatted to ext4.
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Oct 26, 2010
The CPU frequency scaling monitor won't stay at 800mhz after reboot or a certain period of time. My goal is to always have my dual core CPU locked at 800mhz to have it run cooler. I'm running Ubuntu 10.10 on my toshiba u300 laptop.
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May 25, 2010
I'm curious how I can use a Windows client with two separate accounts to connect, at the same time, to a SMB server hosting two shares. (Provided permissions and accounts are all in order)
Scenario:User1 is always logged onto a Windows client mapped to a Public share on a Linux SMB server.I need a way to keep User1 connected to the Public share and then when needed, allow User1 to provide User2's credentials to connect to a Restricted share.The only way I've been able to do this is to disconnect from the Public Share then reconnect to the Restricted share using User2's credentials. (This is the issue because I need to keep User1 connected to the Public share).Is this a limitation of SMB? Or am I missing a configuration? Please point me in the right direction
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Apr 23, 2011
My power went out for an extended period of time and now my graphics are messed up. I started my computer up and I only can get 640x480, so I was trying to reinstall the drivers but the nvidia drivers on the repositroy do not make sense as far as what goes with what, or descriptions of them. I downloaded the driver off nvidias website instaled it. It went to my desktop same problem.
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Apr 6, 2010
I recently decided to install Ubuntu and I went through all of the steps to set up a subversion server using svnserve. It all works except for one thing: it stops responding to remote computers after a while.I have the server on a 4 port wireless router/switch in my dorm room. I set up port forwarding so that the server receives all traic over the correct ports. The subversion server AND the default http server on Ubuntu work fine always as long as I access them from a computer connected to the switch in my room.The problem is that if I try to access it from anywhere else, it won't respond at all unless it has been accessed by a computer on the switch recently (something like 30-60 minutes). So to fix it I have to go back to my room and access it from a computer on the switch. Then it will work from anywhere for another 30-60 minutes.
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Jul 17, 2011
I have a ubuntu 10.04 dedicated server that I am having problems with. It intermittently cannot connect to any other servers outside its network.
Code:
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
^C
--- 8.8.8.8 ping statistics ---
8 packets transmitted, 0 received, 100% packet loss, time 7008ms
(I have tried a bunch of other ips too and none outside its network are pingable) I'm not sure if this is a problem with my server or a problem with the networking outside the server. I have been emailing my server provider and they keep on insisting the problem is with the server and that their network is working fine. Apparently all of their other servers work and they can login into the gateway and ping 8.8.8.8 from there. So they just want to reinstall the OS, but I thought I'd post here to see if anyone has any ideas.
Here is some info I have gained while troubleshooting: I haven't changed any settings at all on the server for months. I haven't done any updates for about a week. The strangest thing is that this is intermittent, there have been a few times in the last 24 hours where I have been able to ping 8.8.8.8 or other ips, but 98% of the time I can't. I have also tried rebooting the server, which had no effect. I can ping the gateway, and I can ping other servers on the same subnet. I can ssh onto the server from my home internet connection, and I can view webpages on apache, so incoming connections work.
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