ssh password delay

[backdoc]

Additional info.

I started sshd with -ddd.  It is definitely hanging on the line:
"Trying to reverse map address 192.168.1.102."

Now, I'm not sure how to fix that.  BTW, I do have VerifyReverseMapping 
set to "NO" in sshd_config.  But, that seems to be being ignored.

Any suggestions?
darren


darren wrote:
> I could use some help troubleshooting a problem that I am having with 
> long delays before receiving a password prompt when I log onto my 
> FreeBSD box via ssh.
> 
> I have done quite a bit of googling and I realize that the problem 
> likely has something to do with reverse DNS lookups.  But, I don't know 
> how to pinpoint the problem from there.  I've basically been playing 
> with the /etc/resolv.conf and /etc/hosts settings.  In my hosts file, I 
> have an entry for the private IP of my Linux box with its hostname 
> (which is not a FQDN) and my resolv.conf file looks like:
> 
> domain myrealdomain.com //I just added this, but no noticeable help
> search myrealdomain.com
> nameserver my.ip's.dns.numbers
> nameserver my.ip's.dns.numbers2
> 
> Here's a more detailed explanation of the problem.  To me, the problem 
> seems very peculiar.  The problem only exists whenever I use my laptop 
> (which is running Linux) from within my own LAN.   I can get around it 
> by logging onto my ISP's server or my school's server (either one) and 
> then logging back into my FreeBSD box from there.  If I am at school 
> with my laptop, I can even log into my FreeBSD server at home directly 
> without a delay.  But, if I try going directly to my FreeBSD box from my 
> laptop when they are both inside the LAN, I get a very long delay (like 
> 3 minutes).  Sometimes the delay is so long, the connection times out 
> and I never get a prompt.
> 
> I have set the logging level up to DEBUG3 in the /etc/sshd_config file. 
>  But, I don't see where any verbose output is going.
> 
> This problem is on FreeBSD 4.10-RELEASE.
> 
> TIA,
> backdoc
> 
> The /var/log/auth.log file just says:
> ... fatal: Timeout before authentication for 192......
> 
> Here's what my laptop spits out before the long delay kicks in.
> 
> root at laptop:/home/backdoc # ssh  -vl backdoc 192.168.1.4
> OpenSSH_3.9p1 Debian-1ubuntu2, OpenSSL 0.9.7e 25 Oct 2004
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug1: Applying options for *
> debug1: Connecting to 192.168.1.4 [192.168.1.4] 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 1.99, remote software version 
> OpenSSH_3.5p1 FreeBSD-20030924
> debug1: match: OpenSSH_3.5p1 FreeBSD-20030924 pat OpenSSH*
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_3.9p1 Debian-1ubuntu2
> 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 '192.168.1.4' is known and matches the DSA host key.
> debug1: Found key in /root/.ssh/known_hosts:1
> 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_REQUEST sent
> debug1: SSH2_MSG_SERVICE_ACCEPT received
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