Problems with SSH / telnet Post: 302246670

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Operating Systems AIX Problems with SSH / telnet Post 302246670 by Hille on Tuesday 14th of October 2008 05:29:39 AM

10-14-2008

Registered User

Problems with SSH / telnet

Hey,

I have upgraded 3 servers from SSH Tectia 4.0.3 to SSH Tectia 6.0.2. 2 of them are working fine but one server suddenly began to have troubles after about 2 hours. Now it is impossible to login to this server using SSH and even telnet. When SSH is running on this particular server, the CPU of the server is at it's maximum because of the SSH processes, which is not the case on the other 2 servers. Currently I have shut down the SSH processes on the server.

Then, when I try to make a connection using telnet it immediatly replies: 'Connection closed'. The strange fact however is that telnet refuses a connection done by the root user, but if I try it using another user, telnet works fine. (SSH doen't work in either case though) Restarting and even reinstalling SSH also didn't work. After SSH was uninstalled I tried another telnet connection but still it didn't work.

I've checked /etc/security/user, because of the telnet/root problem, but everything looks identical to the configuration of the other 2 servers. Can anyone help me with this problem?

Thank you

Hille

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libssh2_channel_direct_tcpip_ex

libssh2_channel_direct_tcpip_ex(3)				  libssh2 manual				libssh2_channel_direct_tcpip_ex(3)

NAME

       libssh2_channel_direct_tcpip_ex - Tunnel a TCP connection through an SSH session

SYNOPSIS

       #include <libssh2.h>

       LIBSSH2_CHANNEL * libssh2_channel_direct_tcpip_ex(LIBSSH2_SESSION *session, const char *host, int port, const char *shost, int sport);

       LIBSSH2_CHANNEL * libssh2_channel_direct_tcpip(LIBSSH2_SESSION *session, const char *host, int port);

DESCRIPTION

       session - Session instance as returned by libssh2_session_init_ex(3)

       host - Third party host to connect to using the SSH host as a proxy.

       port - Port on third party host to connect to.

       shost - Host to tell the SSH server the connection originated on.

       sport - Port to tell the SSH server the connection originated from.

       Tunnel  a TCP/IP connection through the SSH transport via the remote host to a third party. Communication from the client to the SSH server
       remains encrypted, communication from the server to the 3rd party host travels in cleartext.

RETURN VALUE

       Pointer to a newly allocated LIBSSH2_CHANNEL instance, or NULL on errors.

ERRORS

       LIBSSH2_ERROR_ALLOC -  An internal memory allocation call failed.

SEE ALSO

       libssh2_session_init_ex(3)

libssh2 0.15							    1 Jun 2007					libssh2_channel_direct_tcpip_ex(3)