RE: How important is static IP?

["Chris Bond" <chris@xxxxxxx>]

> Personally, I don't generally find having dynamic IP a problem for
home
> use.

Yeah but for us HA addicts we tend to need em :)

> As previously mentioned, just about the only thing I can't get it
to
do is 
> to host a provate domain. - It's usually tied to the namespace
that
the
> DDNS 
> provider owns, so for instance, DynDNS,org have about 20 domain
trees
that 
> you can choose to be under, hence I have Paulgordon.homeip.net, but
I
> can't 
> have gordon-net.co.uk which I also own (but am about to allow to
lapse...)

The problems lie with resolving cache TTL, usually you don't have a
problem but some isps have stupid TTL's, then again most decent DDNS
providers hardcode the TTL.

> 1: - you *CAN* have an SMTP feed to a dynamic IP address - I have one
> working perfectly, - mail to paul@xxxxxxx to see it in 
> action... :-)

I didn't say you could only that I wouldn't recommend it :)

> 2: - you do *NOT* _need_ an MX record at all to receive mail, -
you
only 
> need an MX record if your SMTP listening server is on a different
IP
> address 
> to that which your DNS "A" record resolves... - Do an
NSLOOKUP on 
> paulgordon.homeip.net, you will see it resolves to 80.1.127.35 - as
my
> SMTP 
> mail server is listening to port 25 on that IP, I do NOT have (or
need) an 
> MX record configured.

As you don't have any mx records basically you wont have any emails
backed up if your adsl line dies.





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