ssh hang

Randy Bush randy at
Fri Jan 30 00:31:21 PST 2004

recently, i have been seeing a large pause when sshing into my -stable
systems from a -current.  no problem between -stable systems

ssh on today's -current
sshd on two week old -stable
what would cause the giant pause?

% ssh -v myhost
OpenSSH_3.7.1p2 FreeBSD-20040106, SSH protocols 1.5/2.0, OpenSSL 0.9.7c 30 Sep 2003
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to myhost.dom.ain [666.42.7.11] port 22.
debug1: Connection established.
debug1: identity file /usr/home/randy/.ssh/identity type 0
debug1: identity file /usr/home/randy/.ssh/id_rsa type 1
debug1: identity file /usr/home/randy/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_3.5p1 FreeBSD-20030924
debug1: match: OpenSSH_3.5p1 FreeBSD-20030924 pat OpenSSH_3.2*,OpenSSH_3.3*,OpenSSH_3.4*,OpenSSH_3.5*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.7.1p2 FreeBSD-20040106
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: 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 'myhost.dom.ain' is known and matches the DSA host key.
debug1: Found key in /usr/home/randy/.ssh/known_hosts:18
debug1: ssh_dss_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_ACCEPT received

<15-30 second pause>

debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /usr/home/randy/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: /usr/home/randy/.ssh/id_dsa
debug1: Server accepts key: pkalg ssh-dss blen 435
debug1: Authentication succeeded (publickey).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Requesting X11 forwarding with authentication spoofing.
Last login: Thu Jan 29 23:12:14 2004 from roamer.dom.ain
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FreeBSD 4.9-STABLE (MYHOST) #14: Thu Jan 15 20:25:08 PST 2004

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