DNS update

[T-bag]

> But if you're talking about *reverse* DNS, that requires the cooperation
of
> your ISP.

What is the difference between forward and reverse .. why is reverse needed?

But it's generally not critical that the reverse DNS entry match
> your forward entry.  The ISP should have a name in their own domain that
> also maps to your address, and that's sufficient.  There's nothing wrong
> with having two A records point to the same IP address, and the PTR record
> only needs to point to one of them.
>

But the default one would be the ISP's?  For example for an hostname to work
on irc would you need reverse?

Sorry, newbie :)