I am facing problem while connection to host (Red Hat Enterprise Linux ES release 4 (Nahant Update 5)) via putty.
when ever i try to connect host machine via putty/ssh, connection is established succussfully but just after few minutes it disconnectes . same is the problem if i connect using VNC. I did't made any configuration changes in recent past, earlier every thing was fine.
In my case, it occurs intermittently when trying to connect using putty's command line client 'plink.exe' to a linux machine using ssh. For some testing purposes, a linux server is setup with 8K virtual ip addresses and the testing scripts will connect to these ip addresses through ssh using plink.exe. There will be concurrently 25 ssh sessions launched to the server. While it works for sometimes, it throws 'server unexpectedly closed network connection' error intermittently. If the same ip address is tried again manually, it works. While the ssh server is accepting connections, this error is thrown sometimes and unable to find out the reason from the logs. It is not that the ssh connection is completely blocked. It gives this error message while connecting to some of the virtual ip addresses but works some times.
The hosts.deny, sshd_config are tuned to allow the connections, allow more sessions etc.
We have one FTP server. Users are uploding files to the perticular directory remotely. but today some users got below error message.
421 Service not available, remote server has closed connection.
(vsftpd service is up and running) What are the possible causes for this error and from where I should start troubleshooting?
I'm trying to run a web server on ubuntu lucid, and I have a problem what is not directly linux related, but a problem with opening ports. I hope this question is welcome here as well. When I open port 80 everything works well. My server is accessible from outside. But strangely the day after the port is closed again. Right now I have do reset my router every day to keep that port open and well, that's not much of a solution. I wonder how it is possible. I configure everything on my router, I save the settings and it works. How come it automatically resets my configurations over time?
View 9 Replies View Relatedthe location bar at the top disappears every time I close and then re-open it, and I have to hit View/Location Bar to get it back. Is there a way to permanently keep it there?
View 2 Replies View RelatedI'm a frequent user of the shared connection feature of SSH. Usually i have two or three connections open at the same time through the connection sharing feature, but sometimes when i try to start another i get the message "Shared connection to <server< closed". All the connection that are established through the connection sharing feature are still active and not closed, but when i try to create a new one i get that message.. i've even got that message when i have only had two connections through the shared connection feature.
I've tried to search google but it doesnt seem like anyone else has had the same kind of problem, does someone know why i sometimes get this error ?
As the title implies, I'm having an issue with svn, whenever I try to make an svn action, I get: svn: Network connection closed unexpectedly
I've done some Google-fu on this, and the obvious culprits don't seem to be at work. Specifically, the svn server does not use a nonstandard port, and I'm not using Tortoise SVN or putty, just going directly from the command line. Additionally, I was able to use the server as recently as this morning and no coworkers are having problems.
I have a weird problem with ssh, I am trying to ssh to a solaris server (sparc) running solaris 10 from my Ubuntu box and as soon as it authenticates the password it closes the connection. The box is located on a internal network in a wiring closet with no ability for me to access console but i still have a working ssh session from 2 days ago with what i'm trying to comb through settings and trying to resolve the issue. It also has 2 NIC's and I cannot connect to the either ruling out hardware problem. I checked if there is a limit of the number of active connections and the was no limit. I was able to connect mitiple session till 2 days ago (at one point i had on my machine 8 active ssh sessions to the same server).
Here is the output of ssh -vvv:
Code: $ ssh -vvv -l user1 10.100.xxxxx
OpenSSH_5.5p1 Debian-4ubuntu4, OpenSSL 0.9.8o 01 Jun 2010
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0 .....
debug3: channel 0: close_fds r -1 w -1 e 6
Connection to 10.100.50.4 closed.
Transferred: sent 1768, received 1688 bytes, in 0.1 seconds
Bytes per second: sent 12077.9, received 11531.4
debug1: Exit status 254
I'm using Ubuntu 11.04. I've bought an account in a SSH sever.
Code:
loveright 02:41:54 ~$ ssh gqqnb@205.185.123.107
gqqnb@205.185.123.107's password:
Last login: Sat Jul 2 14:41:53 2011 from 123.137.120.69
Connection to 205.185.123.107 closed.
[Code].....
setting up an SFTP server on debian, all the way down through step 3, though I did not "Match Group" I did Match User as I only need 1 user to have access to the SFTP server(did not continue on to step 4 and beyond as they did not apply to me) Im getting the error:
connection closed by server with exitcode 141
I get this when trying to log in via filezilla. I actually only got the 141 error on the first attempt, any attempts after that just says "could not connect to server". Username and password authentication goes through, so it is not a login info issue.Im running Debian squeeze, and that guide was for Lenny, that shouldnt matter, I dont think.
I have installed Fedora 13 and updated it. I simply cant use ssh to connect to this Fedora, not even locally. I have enabled port22 in firewall settings and nothing. Tried to disable firewall completely and nothing. I have disabled SELinux (not sure if it has something to do with this, but... ) and nothing. Entered "ALL: ALL" in /etc/hosts.allow and still nothing. Dont know what to do anymore.
Here is what happens when I try to ssh to this machine, even from it:
[flibio@surf ~]$ ssh localhost
warning: Need basic cursor movement capability, using vt100
flibio's password:
Authentication successful.
Disconnected; connection lost (Connection closed.).
Connection to localhost closed.
[flibio@surf ~]$
Looking into Services > sshd and it says "This service is dead."
So I tried:
[root@surf etc]# service sshd restart
Stopping sshd: [FAILED]
Starting sshd: : OpenSSH_5.4p1 on
: FATAL: Creating listener failed: port 22 probably already in use! .....
And still I get disconnected whenever I try to ssh to this machine from anywhere. Services says that sshd is allways dead, even restarting it but I can only restart it by doing a pkill sshd before.
I am having trouble connecting to one of the VM's through ssh from base machine all of a sudden. All I get is an error : ssh_exchange_identification: Connection closed by remote host
--IP/Hostname crossed out --
[root@XX-XX02 ~]# ssh -v 1XX.1X.5X.1XX
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008[code].....
Saying that the problem is only with ssh would be wrong as I can't seem to telnet or ftp it either. But I can ping it fine.When I try to login to that VM through console, it won't even let me login. The screen would flash for a sec and the same login prompt would reappear. I am not sure what exactly happened as it was working fine before.
OS version: CentOS release 5.5 (Final)
uname -a: Linux XX.XX 2.6.18-194.17.1.el5 #1 SMP Wed Sep 29 12:50:31 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
Just setup my postfix and trying to telnet localhost.
here it is..
telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Connection closed by foreign host.
I wanna paste my /var/log/maillog but i don't know how, when i copy from putty screen it's only copied part of the log.
btw i found one similar problem here [URL] but the thread starter already lost the pastebin so i don't know how he resolved the problems.
I have recently installed fedora 14 and configured vpn to access my work network. I need to access some windows machines which although I can ping I cannot remote desktop into. When I go to Applications>Internet> Remote Desktop Viewer and put in the machine name (either just the machine name or the FQDN including the domain name) I get an error "Connection to <machinename> was closed".
View 4 Replies View Relatedi try to connect to a specific ip address with ssh i have installed the ssh server and client. i also try it by connecting with localhost without any problem. But i keep taking this message if to try to connect to the ip address. i checked my hosts.allow and hosts.deny files and all are commented in there (i think tha this should not be the problem).
View 2 Replies View RelatedI'm forwarding an application (HandBrakegui) over an ssh tunnel using X11 forwarding as follows
ssh -C -p PORTNUM user@host -X ghb
This all works fine and X11 loads and handbrake's X11 output to my local mac.The server is Ubuntu 10.4 and the client is Mac OS X.Is it possible for the X11 HandBrake Gui session to be kept alive once the SSH tunnel or the X11 window on the client (mac) has been closed? As I'm adding files to HandBrakes queue I want the programme to finish encoding them even if I turn off the client computer as the server is always on.
Several of our servers that do not have direct exposure to the Internet have the following entry appearing in their respective /var/log/secure files.Are these messages harmless? If so, is there any way or reason to suppress their appearing in the log files?
View 1 Replies View RelatedFirstly I am new to red5 and not very strong when it comes to linux. I have had installed red5 on my dedicated server and going by the http://myIP:5080/installer demos it is all working fine. My problem is I cannot get it to work with my software being flashchat. I am not sure if it comes from me using the incorrect RTMP url and if so after trying about 20 or more ways of typing it in I always get the same error message "Connection Failed' or "Connection Closed" not to sure what is meant by Closed as to whether it's working but can't get in or what ever. I am after someone who can get this to work for me please and I am willing to pay for that service once it is working.
View 2 Replies View RelatedI have set up SSH and redirected the ssh server to listen on another port other than 22 for a bit of added security.
Now in hosts.deny I have:
ALL : ALL
In hosts.allow I have:
SSH : ip_address_of_client
I can no longer connect. I get the message: ssh_exchange_identification: Connection closed by remote host.
When I change hosts.allow to read:
ALL : ip_address_of_client
I can successfully connect the server.
However, I only want to allow SSH access in hosts.allow. What is the correct syntax?
I have tried and failed with each one of these:
SSH : ip_address:port_number
SSH2 : ipaddress
sshfwd-portnumber : ip_address_of_client
I have configured rssh 2.3 with openssh 5.8 on RHEL 5.6 64 bit to restrict the users to scp and sftp. When i try to sftp or scp it gives error connection closed. After long googling tried different solutions like add missing libraries, setuid to rssh_helper. I had full copy of /lib to /chroot/lib and /chroot/lib64 but no success. conf and log files are below for reference.
[Code]...
Since the upgrade from Lenny to Squeeze on my Notebook Toshiba Satellite Pro U200 with Intel Pro/Wireless 3945 ABG I have wireless connection problems.The connection breaks time to time and sometimes cannot connect automaticaly after restart. BTW I didn't change anything on the wireless or network configurations on the notebook and on the wiereless router.
View 8 Replies View RelatedIn the right upper corner of your screen,you can see if you have a network connection or not.Most of the time I do not have one according to Networkmanager (?).So I have to enable my wired connection manually.I already tried a lot to change my settings so I would have a network connection at boot,but it doesn't seem to work....Firefox is in Offline modus when I logon..
View 2 Replies View RelatedI've tried installing Ubuntu 10.4 and 9.10, but every time it crashes all of a sudden and says that ubiquity closed unexpectedly.
View 6 Replies View RelatedOkay so I am a total newb to linux. I installed Ubuntu using Wubi and am trying to figure out how to get my wireless connection working. It occurred to me I may not have the right driver for use with Ubuntu for the wireless connection at my house. I couldn't find anything on the web to help..it appears I have a realtek RTL8102E wireless card in my laptop. I have absolutely no idea how to resolve this situation..I've looked on the web, but everythings pretty confusing. If I could get the wireless working it would be a good first step.
View 3 Replies View RelatedI have a wireless connection to the internet, as well as a wired connection to a local network. When the wired connection to my local network is enabled, the wireless connection to the internet no longer works until I disconnect the ethernet cable.
(This setup used to work just fine when I was using Windows, but now doesn't seem to work. I wasn't using IP aliasing in Windows, but I am now, which may be causing the problem.)
My original connection to the internet was a wired one, at eth0, so once I got wireless enabled (on eth1), I created an IP alias to my local network of eth0:1 which is a static IP on my local network. The only configuration I did at all was to add a file named /etc/sysconfig/network-scripts/ifcfg-eth0:1, with the following contents:
Code:
And NetworkManager just seemed to pick it up automatically - I didn't change anything else in NetworkManager or anywhere else.
(Also I use 'service NetworkManager start/stop' entirely rather than 'service network start/stop' to manage my connnections. i.e. I did 'chkconfig network off' when setting everything up initially.)
I have a network of 100 machines, all with ubuntu Linux. Is there a limit to the number of machines that can connect to one single machine (at the same time)? For example, can I have 99 of my machines maintain continuous ssh connection to the 100th machine? Can I have every one of my machines (every one of the 100) maintain a continuous ssh connection to all other 99 machines? How much memory does each such a connection take?
View 2 Replies View RelatedWhen I have video running and the video stops, I see that the connection is destroyed in about 5 seconds, which is what I want. If, rather than stopping the video, I pull the plug, I have seen it take 350 and 380 seconds before the connection is destroyed. Why is there such a large difference in the time to destroy a video connection between stopping the video and pulling the plug on it when using net filter connection tracking? How can I shorten the time for the connection to get destroyed when pulling the plug?
View 3 Replies View RelatedI performed a F13 to F14 upgrade today and it went very well. The only problem I'm having is that I can longer Telnet to the machine.The client side returns a "connection closed by foreign host" message or "connection to host lost", depending on the client.The /var/log/messages file contains "FATAL: bad tty" following every telnet attempt.I receive the same error even when trying to telnet to localhost on the local machine.
View 9 Replies View RelatedI recently installed postfix and squirrelmail. And it doesn't work.
Quote:
> telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
code....
I'm remotely connecting to SUSE 10 system using OpenSSH_4.2p1 from PUTTY. My problem is that my session to the server was getting disconnected after some time. when i'm giving "exit" command, it is giving the message "server unexpectedly closednetworkconnection".Also it is showing my last login wrongly. what went wrong from sshd side i dont know
View 7 Replies View Related
