 | | | FC1 and SSH - logins taking a long time | FC1 and SSH - logins taking a long time 2004-06-23 - By Rick Stevens
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jeffrey_n_Dyke@(protected) wrote:
>
>
>
> jeffrey_n_Dyke@(protected) wrote:
>
> >Hi. This is not exactly a FC question/problem, but i 'm getting nothing
> >from the ssh mailing lists or comp.security.ssh.
> >
> >i have an issue where ssh logins are taking over 10 seconds. Assuming
> >this is the DNS error seen here- >
http://www.openssh.com/faq.html#3.3.
> >I tried to add both UseDNS no and AddressFamily inet. Both gave me
>
> errors
>
> >stating they were invalid options -- >
> >
> >/etc/ssh/sshd_config: line 33: Bad configuration option: UseDNS
> >/etc/ssh/sshd_config: line 35: Bad configuration option: AddressFamily
> >
> >I 'm running OpenSSH_3.6.1p2. on FC1, the following rpms are on my system
> >
> >[root@(protected) etc] rpm -qa | grep -i ssh
> >openssh-3.6.1p2-19
> >openssh-server-3.6.1p2-19
> >openssh-askpass-3.6.1p2-19
> >openssh-askpass-gnome-3.6.1p2-19
> >openssh-clients-3.6.1p2-19
> >
> >
> >The same slowness occurs when i the internal IP of 192.168.0.4. in
> >lieu of domain name.
> >
> >any help is appreciated
>
>
> >The configuration below is pretty standard. My guess is that you really
> >do have a DNS issue. The most likely problem is that reverse DNS is not
> >working (that 's IP-to-hostname rather than normal DNS which is
> >hostname-to-IP). You could verify this by getting on the SSN target
> >machine (192.168.0.4) and running:
>
>
> > tcpdump port 53
>
>
> >and watching the output to see if the DNS stuff is being resolved right
> >or timing out when you try to ssh to that machine.
>
>
> >Since you 're on a non-routable IP address (192.168/16), a reverse DNS
> >lookup will most likely fail unless you either run an internal DNS
> >server on your local LAN with a full reverse DNS database or you add the
> >appropriate entries to the SSH target 's /etc/hosts file.
>
>
> excellent, thanks Rick, i 'll try that when i get home.
>
> >-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
> >- Rick Stevens, Senior Systems Engineer rstevens@(protected) -
> >- VitalStream, Inc.
http://www.vitalstream.com
-
> >- -
> >-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
>
>
> no quote for me...jip :)
DOH! There is a glitch in my program that poops out if the random
number causes the program to hit the first or last fortune (not sure
which it is), and I 'm not checking for that condition (laziness, I
guess). Well, I suppose I could fix it and repost the program. Or
I can just adhere to one of the other .sig lines it generates:
"Never test for an error condition you don 't know how to handle. "
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
- Rick Stevens, Senior Systems Engineer rstevens@(protected) -
- VitalStream, Inc.
http://www.vitalstream.com
-
- -
- grasshopotomaus: A creature that can leap to tremendous heights... -
- ...once. -
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
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