DNS and Time Warner Cable

[Marvin Bellamy]

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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