RE: spontaneous lag (x3)

[gabriel <dan netgenetix com>]

k
i tried out dnswalk
and it gave me various warnings that i don't understand:

WARN: subdomain2.domain.com A 192.168.0.5: no PTR record
WARN: subdomain3.domain.com A 192.168.0.7: no PTR record

the nameserver is running on 192.168.0.4, and all all subdomains pointed
to that ip aren't giving me any issues.

in /var/named i have a file called db.subdomain.com and in that file are
references that look like this

subdomain1                  IN      A       192.168.0.4
subdomain2                  IN      A       192.168.0.5
subdomain3                  IN      A       192.168.0.7

and in the same directory i have a file called "db.192.168.0" and it has
entries in it that look like this:

4.0.168.192.in-addr.arpa.   IN   PTR   subdomain1.domain.com.
5.0.168.192.in-addr.arpa.   IN   PTR   subdomain2.domain.com.
7.0.168.192.in-addr.arpa.   IN   PTR   subdomain3.domain.com.

i'm sure i'm missing something
but what is it?




On Thu, 2002-02-28 at 11:17, Paul Hamm wrote:
> Sounds like you have a resolver issue.  Check your DNS specificaly the
> reverse lookup.  Or you may have been hacked ;-)
> 
> -----Original Message-----
> From: gabriel [mailto:dan netgenetix com]
> Sent: Thursday, February 28, 2002 12:41 PM
> To: redhat-list redhat com
> Subject: spontaneous lag (x3)
> 
> 
> the oddest thing has been happening to the machines here in my office
> for the past few months. most of the time, telnetd/sshd/ftpd all seem to
> be working fine, but on three separate days in the last two months, an
> odd lag has manifested itself during the login.  ie. it takes nearly a
> full minute to telnet into a local rh6.2 machine. and about the same
> time to ftp between either machines.  apache however, which both are
> running seems to be working fine.  as is named.
> 
> now i've emailed this list before with this question, but the problem
> disappeared about 24hours after it started so i gave up on the thread. 
> but now it's been recurring: the second time ocurring about a month
> after the first, and this time, today, about 2weeks after the second
> time.
> 
> to rule out the previous suggestions, i can assure you all that i
> haven't been playing with the firewall, because i haven't installed one.
> (we're behind a firewall on a local network running private ips).  the
> proftpd, telnetd, and sshd haven't changed since i installed them, so
> i'm looking for suggestions as to what exactly is going on...
> the dates this has happened in the past are below:
> 
> start           stop
> 2002.01.16      2002.01.17
> 2002.02.19      2002.02.20
> 2002.02.28	????.??.??
> 
> and here's a list of the specs on the two machines:
> 
> sparc64
> rh6.2
> inetd
> telnetd
> proftpd 1.2.4
> apache 1.3.20
> 
> pentiumI
> rh7.2
> xinetd
> sshd
> proftpd 1.2.4
> apache 1.3.23
> 
> 
> thanks so much to anyone out there who knows what's going on here.
> 
> 
> 
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