UDP Port 53

[numa at thenuma.com]

www.dyndns.org

> Quoting jose sanchez <j_r_sanchez at yahoo.com>:
>
>> I have a couple of questions regarding hosting your
>> own DNS server.
>> 1. Does RR blocks port 53 (udp) so clients can't run
>> their own server?
>> 2. If no, Can port 53 be NATed and forwarded to an
>> internal box?
>
> You can run a DNS server for your own internal network, and you can
> internally  serve any domain you choose.  Some of use use this to create
> false DNS entries  to block pop-up ads and other known nasties.
>
> You can NOT arbitrarily set up a public DNS server and start advertising
> your  IP as the home of arbitrary domain names.  You need a chain of
> authoritative  entries right back to the root servers that says your IP
> is the source of  authority for that domain.  One of the parties that
> would have to participate  and cooperate in this scheme is RoadRunner,
> who owns your IP address and the  domain name that is actually
> associated with it.
>
> I know one ISP who charges about $100 per domain to set up the proper
> DNS  chain.  I know another who does it as part of registering your
> domain name,  pointing it at any IP you specify.
>
> As far as your UDP masking goes, you're not clear on whether you're
> trying to  access UDP ports on your RR firewall from outside or whether
> you're doing  stuff from within.
>
> How do you test your connections from outside your private net?  (I
> often use  an ssh connection to a remote machine, which I then point
> back at my own with  lynx or telent.)
>
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