Bind 8 crashing on bad NAT

[Sybren Stuvel]

I've got some more extra data on my original question. Because of the bad 
NAT that happens at my ISP, I get an awful lot of the following error messages:

Response from unexpected source ([202.12.27.33].53)
Response from unexpected source ([212.209.133.243].53)
Response from unexpected source ([208.51.8.2].53)
Response from unexpected source ([198.32.64.12].53)
Response from unexpected source ([24.30.200.3].53)
Response from unexpected source ([192.5.5.241].53)
Response from unexpected source ([194.22.190.10].53)

Maybe this helps tracking the source of the problem, and a possible solution.

Greetz,
Sybren


At 12:39 11/14/00, you wrote:

>Hi!
>
>I'm using an ADSL connection, provided by the Dutch company KPN. They (KPN)
>use some kind of weird method of Network Address Translation (NAT). Our IP
>address, from the Internet point of view, is 194.109.221.152. Our IP
>address, from our server's point of view, is 10.67.195.129. No, I'm not
>mistaken, this is really the IP address our server has:
>
>ppp0      Link encap:Point-to-Point Protocol
>            inet 
> addr:10.67.195.129  P-t-P:195.190.229.51  Mask:255.255.255.255
>            UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
>            RX packets:26374 errors:0 dropped:0 overruns:0 frame:0
>            TX packets:22454 errors:0 dropped:0 overruns:0 carrier:0
>            collisions:0 txqueuelen:10
>
>Because of this, named often crashes and complains about lame servers,
>which aren't lame at all.
>
>I've tried both bind 8 and 9. Bind 8 complains a lot, but is ok again after
>a 'ndc restart'. Bind 9 doesn't crash, but has other problems. With bind 9,
>it often can't find a domain, unless I look it up using another server first:
>
>dig kernel.org <- fails, using our bind 9 name server
>dig kernel.org @ns.xs4all.nl <- ok, using our provider's name server
>dig kernel.org <- ok, using our own bind 9 name server again.
>
>Isn't that weird???
>
>Does anyone have an answer to these problems? Especially the first (bind 8)
>problem is important to us.
>
>Greetz,
>MeltDown
>
>Linux version 2.2.16-22
>RedHat 7
>Bind version 8.2.2_P5-25 and 9.0.0rc6