Intermittent name resolution issues

[Michael Varre]

Are you behind a pix or some other firewall?  I had to raise max packet size
for dns entries on my pix to 1024 (many people suggest 4096).  It has to do
with the size of some domains' EDNS0 response packets.



Michael Varre (mike at kishmish.com)
Kishmish LLC. - Systems Administrator
2 Clinton Square Suite 130
Syracuse, NY 13202
t. 315.478.8172
f. 800.375.3951
m. 315.952.5753
 
Kishmish LLC. Network Services
www.kishmish.com
 
 
"Do not be afraid to try something new...Remember, amateurs built the ark;
professionals built the Titanic." 
 
[Hidden DOS secret: Add BUGS=OFF to your CONFIG.SYS]
 

> -----Original Message-----
> From: bind-users-bounce at isc.org 
> [mailto:bind-users-bounce at isc.org] On Behalf Of Jeffrey Brown
> Sent: Thursday, August 05, 2004 11:29 AM
> To: bind-users at isc.org
> Subject: Intermittent name resolution issues
> 
> Hello, we have an internal DNS server (9.2.1) that seems to 
> forget how resolve different names on the internet at varoius 
> times. For example, it'll be happily humming along and then 
> it won't resolve www.yahoo.com however, other queries to 
> internet hosts on the internal DNS server resolve OK and our 
> external DNS server resolves www.yahoo.com OK. This behavior 
> will continue until we either restart named or interestingly 
> enough, I've done a $ dig +trace -x <yahoo.coms ip address> 
> <ip of internal dns server>, and what's that has been 
> resolved, it seems the internal name servers cache magically 
> knows how to resolve www.yahoo.com again. Any hints, 
> suggestions, clues. Thanks.
> 
>