Question about name servers

What utility can I use to discover the name server(s) on a subnet (of an ISP
I'm on)?

I wouldn't have to bother, but I'm behind a dumb router that can't figure it
out, so I had to ask a friend (on a different subnet) what his was and use
that.

I'd like to do it properly, but need a little help.

The router is a D-Link DI-604 and I'm running Debian Etch.

Thanks
--
If you wrestle in the mud with a pig.
you both get dirty, and the pig likes it.

-- Dave Dawson


David Dawson

David Dawson wrote:

> What utility can I use to discover the name server(s) on a subnet (of an
> ISP I'm on)?
>
> I wouldn't have to bother, but I'm behind a dumb router that can't figure
> it out, so I had to ask a friend (on a different subnet) what his was and
> use that.
>
> I'd like to do it properly, but need a little help.
>
> The router is a D-Link DI-604 and I'm running Debian Etch.
>
> Thanks

I may be wrong in my interpretation of your post, so forgive me if I bark up
the wrong tree. It sounds to me that you are trying to find server names of
servers your ISP runs. If this is the case, the best way to discover the
servers would be to contact your ISP and ask. Most ISPs have a web page
that lists all the server names you can use to configure your system.

--
Usenet server has changed so update your killfiles if you have based your
filter on my usenet server.

In news:k63544-(E-Mail Removed),
David Dawson <(E-Mail Removed)> wrote:

> What utility can I use to discover the name server(s) on a subnet (of
> an ISP I'm on)?

$ nslookup -sil -query=NS st.vc.shawcable.net
....
Non-authoritative answer:
st.vc.shawcable.net nameserver = pd2ns1.st.vc.shawcable.net.
st.vc.shawcable.net nameserver = pd2ns2.st.vc.shawcable.net.

Authoritative answers can be found from:
pd2ns1.st.vc.shawcable.net internet address = 64.59.144.52
pd2ns2.st.vc.shawcable.net internet address = 64.59.144.53

ynotssor wrote:

> In news:k63544-(E-Mail Removed),
> David Dawson <(E-Mail Removed)> wrote:
>
>> What utility can I use to discover the name server(s) on a subnet (of
>> an ISP I'm on)?
>
> $ nslookup -sil -query=NS st.vc.shawcable.net
> ...
> Non-authoritative answer:
> st.vc.shawcable.net nameserver = pd2ns1.st.vc.shawcable.net.
> st.vc.shawcable.net nameserver = pd2ns2.st.vc.shawcable.net.
>
> Authoritative answers can be found from:
> pd2ns1.st.vc.shawcable.net internet address = 64.59.144.52
> pd2ns2.st.vc.shawcable.net internet address = 64.59.144.53

There may be a problem with this approach. At least some ISPs have different
name server for the external world use and those that their customers use.
When I do the lookup you describe for my ISP, I get a different set of
addresses listed than I get from DHCP or the configuration guide supplioed
by my ISP. The ISP may require their customers to use name servers other
than the servers that are returned with a nslookup or dig command.

--
In prep for a move, my usenet server has changed so anyone that may have me
in a killfile based that uses my server information should update their
killfiles.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

David Dawson wrote:
> What utility can I use to discover the name server(s) on a subnet (of an ISP
> I'm on)?
>
> I wouldn't have to bother, but I'm behind a dumb router that can't figure it
> out, so I had to ask a friend (on a different subnet) what his was and use
> that.
>
> I'd like to do it properly, but need a little help.
>
> The router is a D-Link DI-604 and I'm running Debian Etch.

Generally speaking, if you are using static IP, you just have to
know. Your ISP should supply you with that info.

If router is connection via DHCP, it gets DNS IP when it gets the lease.
In turn, if you are using DHCP, you should get that info in the lease.

But typically, with the DI-604, you should be able to just use it as
the DNS and it will pass on your request.


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (MingW32)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFFb+9iu4tRirKTPYwRAunYAJ9RuRU89NpooRDUuy1Q+K oB+9poBgCbBKJ+
8tuR6ae8qz+nF9AuUrIiWLQ=
=Fl8L
-----END PGP SIGNATURE-----

David Dawson wrote:

> What utility can I use to discover the name server(s) on a subnet (of an
> ISP I'm on)?
>
> I wouldn't have to bother, but I'm behind a dumb router that can't figure
> it out, so I had to ask a friend (on a different subnet) what his was and
> use that.
>
> I'd like to do it properly, but need a little help.
>
> The router is a D-Link DI-604 and I'm running Debian Etch.
>
> Thanks

You may have noticed that you are not getting any replies to your "OOPS -
foot and mouth disease" post. that is because you set "Followup-To:
Question about name servers". This is not the correct way to
use "Followup-To". Followup-To requires a GROUP like
comp.os.linux.networking not a subject like you used. The Followup-to you
used is sending everyone's posts to the group "Question about name servers"
rather than comp.os.linux.networking.

Your Dlink should be able to do everything you want provided you are getting
you use DHCP to get your IP address from your ISP rather than a static
address. That said, if you want to confirm this, use the Dlink
documentation available vi dlink:

http://www.dlink.com/products/suppor...2&sec=0#manual

Sorry if this information manages to get posted in the other tread, I tried
to correct the Followup-to thing in that thread but the message does not
seem to have made it.

--
In prep for a move and the need to be more mobile, I have changed my usenet
server. If anyone has any filters based on my posting host, you should
update them now.