[Bug 538] Hanging while connecting

[bugzilla-daemon at mindrot.org]

http://bugzilla.mindrot.org/show_bug.cgi?id=538

           Summary: Hanging while connecting
           Product: Portable OpenSSH
           Version: 3.6p1
          Platform: ix86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ssh
        AssignedTo: openssh-unix-dev at mindrot.org
        ReportedBy: ao at infinet.com


I'm running into the following problem continually. I'm unsure if its the ssh on
the client side or the sshd on the server side, but here's what happens (with -v
output):

OpenSSH_3.4p1, SSH protocols 1.5/2.0, OpenSSL 0x0090603f
debug1: Reading configuration data /usr/local/etc/ssh_config
debug1: Rhosts Authentication disabled, originating port will not be trusted.
debug1: ssh_connect: needpriv 0
debug1: Connecting to ******** [***.***.***.***] port 22.
debug1: Connection established.
debug1: identity file /home/********/.ssh/identity type -1
debug1: identity file /home/********/.ssh/id_rsa type -1
debug1: identity file /home/********/.ssh/id_dsa type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_3.4p1
Debian 1:3.4p1-1
debug1: match: OpenSSH_3.4p1 Debian 1:3.4p1-1 pat OpenSSH*
Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.4p1
debug1: SSH2_MSG_KEXINIT sent

Hangs here forever, or is OK and...

debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 zlib
debug1: kex: client->server aes128-cbc hmac-md5 zlib
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: dh_gen_key: priv key bits set: 124/256
debug1: bits set: 1577/3191
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'alex' is known and matches the RSA host key.
debug1: Found key in /home/miko/.ssh/known_hosts:8
debug1: bits set: 1570/3191
debug1: ssh_rsa_verify: signature correct
debug1: kex_derive_keys
debug1: newkeys: mode 1
debug1: Enabling compression at level 6.
debug1: SSH2_MSG_NEWKEYS sent
debug1: waiting for SSH2_MSG_NEWKEYS
debug1: newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: done: ssh_kex2.
debug1: send SSH2_MSG_SERVICE_REQUEST

hangs forever here instead.

If I am lucky, about 1 in 30 connection attempts actually succeed.

Does anyone have any idea what this problem might be?

Thanks,

Mike Harrold
Email: mharrold(!!at!!)cas.org



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