DNS and Time Warner Cable
Marvin Bellamy
Marvin.Bellamy at innovision.com
Tue Dec 4 20:35:34 CST 2001
Might be my ipf.rules are blocking DHCP/UDP packets which wouldn't have
been a problem with DSL. I'll have to confirm this. Anyone know the IP
of the RR DHCP server?
Marvin Bellamy wrote:
> In-line comments...
>
> ndr wrote:
>
>>
>> On Tue, 4 Dec 2001, Marvin Bellamy wrote:
>>
>>> Setup:
>>> OpenBSD firewall on a Pentium 133, running IPF and IPNAT
>>> RedHat 7.2 on my desktop, Pentium 500
>>>
>>
>> Which version of OpenBSD? I have the same setup with RR and it works
>> fine.
>>
>
>
> OpenBSD 2.8. How did you configure your external hostname.if file? I
> just have "dhcp" in mine since I wasn't aware of any other options
> that I'd need.
>
>>
>>
>>> Hey all. I just moved to Praire Village, but with no DSL access I
>>> switched to Road Runner. I reconfigured my external NIC to use DHCP
>>> and the session appears to open successfully. The problem is DNS
>>> isn't working. The resolv.conf file is rewritten with a "search"
>>> on the kc.rr.com domain and the three RR DNS servers as
>>> "nameserver"s. I can ping external IPs, but I just can't resolve
>>> names. I even tried reconfiguring my desktop to use the old DSL
>>> nameservers to no avail. Any suggestions?
>>>
>>
>> Try doing a tcpdump on the external NIC. Are you seeing the DNS traffic
>> getting out? How do you have your NAT setup? Any IPF rules? Does an
>> nslookup timeout or does it return an error immediately?
>
>
> Running tcpdump produced practically no output, and that output did
> not appear to be related to my DNS queries. I saw a few dumps with
> ...arp who-has... that usually referenced my gateway address or
> 24.163.154.160, whatever that is. It isn't one of the DNS servers.
> Are there any different types of packets that DHCP might use that
> would have been blocked by my ipf.rules? My firewall is essentially
> unchanged.
>
>
>
>
>
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