topic Re: Unable to connect to server via SSH in Operating System - Linux

Unable to connect to server via SSH

Jojo Castro — Thu, 28 May 2009 07:06:41 GMT

Hi,

Can anyone interpret what does the error below means?
This is because we were not able to connect via ssh.
But can via ftp.

May 28 05:55:19 RCI01 auditd[2790]: Audit daemon rotating log files

May 28 10:56:25 RCI01 kernel: sshd[1778]: segfault at ffffffff9b163a80 rip 00000036e5c76337 rsp 00007fff9b163a78 error 4

May 28 10:56:46 RCI01 kernel: sshd[1792]: segfault at 0000000039ad7040 rip 00000036e5c76337 rsp 00007fff39ad7038 error 4

May 28 10:57:11 RCI01 kernel: sshd[1894]: segfault at 0000000036904220 rip 00000036e5c76337 rsp 00007fff36904218 error 4

May 28 11:01:37 RCI01 kernel: sshd[2241]: segfault at ffffffffe4633f50 rip 00000036e5c76337 rsp 00007fffe4633f48 error 4

May 28 11:03:28 RCI01 kernel: sshd[2419]: segfault at ffffffffb7566e80 rip 00000036e5c76337 rsp 00007fffb7566e78 error 4

May 28 11:24:58 RCI01 kernel: sshd[3941]: segfault at 0000000024b42460 rip 00000036e5c76337 rsp 00007fff24b42458 error 4

May 28 11:55:44 RCI01 kernel: sshd[6288]: segfault at 00000000276b0fc0 rip 00000036e5c76337 rsp 00007fff276b0fb8 error 4

May 28 11:56:08 RCI01 kernel: sshd[6308]: segfault at 000000000960ef20 rip 00000036e5c76337 rsp 00007fff0960ef18 error 4

May 28 11:57:14 RCI01 kernel: sshd[6438]: segfault at 000000006f81e130 rip 00000036e5c76337 rsp 00007fff6f81e128 error 4

May 28 12:04:53 RCI01 kernel: sshd[6999]: segfault at ffffffffa3ec47e0 rip 00000036e5c76337 rsp 00007fffa3ec47d8 error 4

May 28 12:09:46 RCI01 kernel: sshd[7321]: segfault at 000000004569afb0 rip 00000036e5c76337 rsp 00007fff4569afa8 error 4

May 28 12:10:24 RCI01 kernel: sshd[7384]: segfault at ffffffff9c3f2d10 rip 00000036e5c76337 rsp 00007fff9c3f2d08 error 4

May 28 12:11:04 RCI01 kernel: sshd[7412]: segfault at ffffffffb97c80e0 rip 00000036e5c76337 rsp 00007fffb97c80d8 error 4

May 28 12:12:26 RCI01 kernel: sshd[7558]: segfault at ffffffffa2d20630 rip 00000036e5c76337 rsp 00007fffa2d20628 error 4

May 28 12:18:43 RCI01 kernel: sshd[8106]: segfault at 00000000408fd210 rip 00000036e5c76337 rsp 00007fff408fd208 error 4

May 28 12:19:12 RCI01 kernel: sshd[8123]: segfault at 0000000056dda6f0 rip 00000036e5c76337 rsp 00007fff56dda6e8 error 4

May 28 12:19:46 RCI01 kernel: sshd[8155]: segfault at ffffffff95edbd70 rip 00000036e5c76337 rsp 00007fff95edbd68 error 4

May 28 12:19:58 RCI01 kernel: sshd[8167]: segfault at 000000001d45cd70 rip 00000036e5c76337 rsp 00007fff1d45cd68 error 4

May 28 12:20:02 RCI01 kernel: sshd[8172]: segfault at ffffffff8e5c5c30 rip 00000036e5c76337 rsp 00007fff8e5c5c28 error 4

May 28 12:23:25 RCI01 kernel: sshd[8451]: segfault at 0000000051869600 rip 00000036e5c76337 rsp 00007fff518695f8 error 4

May 28 12:23:28 RCI01 kernel: sshd[8459]: segfault at 000000004be76c10 rip 00000036e5c76337 rsp 00007fff4be76c08 error 4

Re: Unable to connect to server via SSH

Jojo Castro — Thu, 28 May 2009 07:16:01 GMT

When connecting to server, via ssh, here is the exact errors

[root@RCI02 ~]# ssh -v -l carl 10.137.31.201

OpenSSH_4.3P2 Debian-9, OpenSSL 0.9.8b 04 May 2006

debug1: Reading configuration data /etc/ssh/ssh_config

debug1: Applying options for *

debug1: Connecting to 10.137.31.201 [10.137.31.201] port 22.

debug1: Connection established.

debug1: permanently_set_uid: 0/0

debug1: identity file /root/.ssh/identity type -1

debug1: identity file /root/.ssh/id_rsa type -1

debug1: identity file /root/.ssh/id_dsa type -1

debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3

debug1: match: OpenSSH_4.3 pat OpenSSH*

debug1: Enabling compatibility mode for protocol 2.0

debug1: Local version string SSH-2.0-OpenSSH_4.3

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(1024<1024<8192) 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 '10.137.31.201' is known and matches the RSA host key.

debug1: Found key in /root/.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

Connection closed by 10.137.31.201

Re: Unable to connect to server via SSH

Jojo Castro — Thu, 28 May 2009 09:13:27 GMT

Additional info.

ssh -vvv -l carl 10.137.31.201
OpenSSH_3.9p1, OpenSSL 0.9.7a Feb 19 2003
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to 10.137.31.201 [10.137.31.201] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/identity type -1
debug1: identity file /root/.ssh/id_rsa type -1
debug1: identity file /root/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.9p1
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit: none,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit: none,zlib@openssh.com
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_init: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 128/256
debug2: bits set: 537/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /root/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 4
debug1: Host '10.137.31.201' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:4
debug2: bits set: 515/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /root/.ssh/identity ((nil))
debug2: key: /root/.ssh/id_rsa ((nil))
debug2: key: /root/.ssh/id_dsa ((nil))
Connection closed by 10.137.31.201

Re: Unable to connect to server via SSH

smatador — Thu, 28 May 2009 09:31:19 GMT

Hi,
I will suspect a bug "segfault"
Googleise it.
https://bugzilla.redhat.com/show_bug.cgi?id=190003
http://osdir.com/ml/debian.devel.ssh/2005-10/msg00028.html
You could try to update some lib and openssh itself.
Hope it helps