Client can't connect to the default port, but can connect to other ports

From: Namit (namityadav_at_gmail.com)
Date: 08/18/05 

Date: 18 Aug 2005 10:18:42 -0700

I am not able to connect to the sshd running on default port, but if I
run a new sshd at a specific port, I can connect to it. Here are debug
outputs from the two calls. syslogs don't show anything either. Can
someone please help me solve this problem.

=================
ps -ef
=================
[namit@namit-pc ~/.ssh]$ ps -ef | grep sshd
root 5114 1 0 Aug12 ? 00:00:05 /usr/sbin/sshd
root 19131 1 0 Aug17 ? 00:00:00 /usr/sbin/sshd -p 10111
namit 30922 19148 0 09:52 pts/6 00:00:00 grep sshd
[namit@namit-pc ~/.ssh]$

=================
Default port
=================
[namit@namit-pc ~/.ssh]$ ssh -v localhost
OpenSSH_3.6.1p2, SSH protocols 1.5/2.0, OpenSSL 0x0090701f
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/namit/.ssh/identity type -1
debug1: identity file /home/namit/.ssh/id_rsa type -1
debug1: identity file /home/namit/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version
OpenSSH_3.6.1p2
debug1: match: OpenSSH_3.6.1p2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.6.1p2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'localhost' is known and matches the RSA host key.
debug1: Found key in /home/namit/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue:
publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/namit/.ssh/identity
debug1: Trying private key: /home/namit/.ssh/id_rsa
debug1: Offering public key: /home/namit/.ssh/id_dsa
debug1: Server accepts key: pkalg ssh-dss blen 433 lastkey 0x8e4ae00
hint 2
debug1: read PEM private key done: type DSA
debug1: Authentication succeeded (publickey).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: channel 0: request pty-req
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: channel 0: request x11-req
debug1: Requesting authentication agent forwarding.
debug1: channel 0: request auth-agent-req@openssh.com
debug1: channel 0: request shell
debug1: channel 0: open confirm rwindow 0 rmax 32768
debug1: channel_free: channel 0: client-session, nchannels 1
Connection to localhost closed by remote host.
Connection to localhost closed.
debug1: Transferred: stdin 0, stdout 0, stderr 81 bytes in 0.3 seconds
debug1: Bytes per second: stdin 0.0, stdout 0.0, stderr 317.3
debug1: Exit status -1

=================
Specific port
=================
[namit@namit-pc ~/.ssh]$ ssh -v localhost -p 10111
OpenSSH_3.6.1p2, SSH protocols 1.5/2.0, OpenSSL 0x0090701f
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Rhosts Authentication disabled, originating port will not be
trusted.
debug1: Connecting to localhost [127.0.0.1] port 10111.
debug1: Connection established.
debug1: identity file /home/namit/.ssh/identity type -1
debug1: identity file /home/namit/.ssh/id_rsa type -1
debug1: identity file /home/namit/.ssh/id_dsa type 2
debug1: Remote protocol version 1.99, remote software version
OpenSSH_3.6.1p2
debug1: match: OpenSSH_3.6.1p2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.6.1p2
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'localhost' is known and matches the RSA host key.
debug1: Found key in /home/namit/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue:
publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/namit/.ssh/identity
debug1: Trying private key: /home/namit/.ssh/id_rsa
debug1: Offering public key: /home/namit/.ssh/id_dsa
debug1: Server accepts key: pkalg ssh-dss blen 433 lastkey 0x8ac79d0
hint 2
debug1: read PEM private key done: type DSA
debug1: Authentication succeeded (publickey).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: channel 0: request pty-req
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: channel 0: request x11-req
debug1: Requesting authentication agent forwarding.
debug1: channel 0: request auth-agent-req@openssh.com
debug1: channel 0: request shell
debug1: channel 0: open confirm rwindow 0 rmax 32768

Relevant Pages

  • OpenSSH 3.5p1 port forwarding problem on Solaris 2.8
    ... I'm trying to use port forwarding to get a SqlNet connections back thru ... This gets a Connection refused. ... debug1: Rhosts Authentication disabled, ...
    (comp.security.ssh)
  • Re: OPENSSH 3.4p1-3 on AIX 4.3.3
    ... Teh debug output from the server is exactly the same, ... another port. ... reverse dns setup properly for that client? ... debug1: Server will not fork when running in debugging mode. ...
    (SSH)
  • SSH Port forwarding does not work
    ... I am attempting connect via remote desktop from my home computer ... attempting to ssh from the Vista computer to my home machine, and port ... debug1: Connection established. ... All remote forwarding requests processed ...
    (comp.security.ssh)
  • Re: OpenSSH and pam_radius_auth.so
    ... ::ffff:10.4.148.59 port 1195 ssh2 ... debug1: PAM: num PAM env strings 0 ...
    (comp.security.ssh)
  • ssh: acces denied (only from remote network)
    ... ListenAddress:: ... owl:/home/mitja# debug1: read PEM private key done: type RSA ... Bind to port 22 on 0.0.0.0. ... Server listening on 0.0.0.0 port 22. ...
    (comp.os.linux.networking)