[lug] Help
vinatha.komirishetty at wipro.com
vinatha.komirishetty at wipro.com
Tue Oct 5 21:42:00 MDT 2004
Hi,
I have been reading the mails with queries that are been posted
to this list.im much intrested in networking concepts with linux as
OS..cud any one of u guide me in knowing them..from the scratch (ie
basics)...i have some basic idea that I have learnt in my UG..
Thanks & Regards,
Vinatha.
-----Original Message-----
From: lug-bounces at lug.boulder.co.us
[mailto:lug-bounces at lug.boulder.co.us] On Behalf Of Michael Deck
Sent: Monday, October 04, 2004 10:45 PM
To: mohadib at openactive.org; Boulder (Colorado) Linux Users Group --
General Mailing List; Boulder (Colorado) Linux Users Group -- General
Mailing List
Subject: Re: [lug] DNS Problems: Is it me, or is it Comcast?
Jason, thanks. That is a really useful tool. I used its advice to tidy
up my zone files. Nothing there to suggest anything super bad, but you
never know what Comcast thinks is bad, I guess.
At 09:52 AM 10/4/2004, Jason Davis wrote:
>http://www.dnsreport.com/tools/dnsreport.ch?domain=cleansoft.com
>
>On Mon, 2004-10-04 at 09:33, Michael Deck wrote:
> > I started having some DNS problems on Friday morning, and I need
> > help determining whether it's in the name server that I administer,
> > or whether it's entirely a Comcast problem (and what I might suggest
> > they do about
> it).
> >
> > Here are the details. On Friday morning I noticed I was unable to
> > ping my remote server (cleansoft.com) by name but I could ping it by
> > IP address (198.49.126.122). This from my home office, which has
Comcast "business"
> > cable internet. The remote host is running KRUD FC1 and is
> > authoritative for cleansoft.com.
> >
> > I also noticed I could ping the server by name from the host of one
> > of my clients. At first I thought that this was a DNS refresh
> > problem, or maybe an iptables problem, but I think I've convinced
myself it isn't iptables.
> >
> > If I put 198.49.126.122 in /etc/resolv.conf as a nameserver, my
> > local problems go away. Emails appear to be reaching me from
> > everywhere except other comcast users.
> >
> > What I don't know is whether my zone files are somehow causing the
> problem.
> > Here is another tidbit that worries me. When I use
> >
> > host -v -C cleansoft.com
> >
> > from my client's system,
> >
> > > host -v -C cleansoft.com
> > Trying "cleansoft.com"
> > Received 121 bytes from xxx.xx.xxx.x#53 in 7 ms
> > Trying "cleansoft.com"
> > ;; connection timed out; no servers could be reached
> >
> > where I've blunked out my client's DNS host address. So what does
> > this mean? I thought -C meant to try to find the authoritative
nameserver.
> >
> > Here is my zone file for cleansoft.com. Note, this setup has been
> > working for a couple of months until Friday morning, and I haven't
> > changed
> anything
> > related to BIND that I am aware of, though there may have been a
> > system reboot in there that I don't know about. I checked my record
> > with my
> domain
> > registrar, and it shows ns1.cleansoft.com 198.49.126.122 as primary
> > nameserver for this domain.
> >
> > cleansoft.com. IN SOA ns1.cleansoft.com. postmaster.cleansoft.com.
(
> > 6 ; Serial
> > 10800 ; Refresh after 3 hours
> > 3600 ; Retry after 1 hour
> > 604800 ; Expire after 1 week
> > 86400 ; Minimum TTL of 1 day
> > )
> >
> > cleansoft.com. IN NS ns1.cleansoft.com.
> > cleansoft.com. IN NS ns2.cleansoft.com.
> >
> > ;
> > ; Host addresses
> > ;
> >
> > localhost.cleansoft.com. IN A 127.0.0.1
> > www.cleansoft.com. IN A 198.49.126.122
> > cleansoft.com. IN A 198.49.126.122
> > mail.cleansoft.com. IN A 198.49.126.122
> > ns1.cleansoft.com. IN A 198.49.126.122
> > ns2.cleansoft.com. IN A 198.49.126.122
> > cleansoft.com. IN MX 0 cleansoft.com.
> >
> >
> >
> > Michael Deck
> > Cleanroom Software Engineering, Inc.
> >
> > _______________________________________________
> > Web Page: http://lug.boulder.co.us
> > Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
> > Join us on IRC: lug.boulder.co.us port=6667 channel=#colug
>
>_______________________________________________
>Web Page: http://lug.boulder.co.us
>Mailing List: http://lists.lug.boulder.co.us/mailman/listinfo/lug
>Join us on IRC: lug.boulder.co.us port=6667 channel=#colug
Michael Deck
Cleanroom Software Engineering, Inc.
_______________________________________________
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