Re: DHCP does not extend IP lease

In news:ec1pBNO9GHA.4708@xxxxxxxxxxxxxxxxxxxx,
Guus Ellenkamp <Ellenkamp_Guus@xxxxxxxxxxx> typed:
I have a W2003 server setup with Routing and Remote access which I
use to access the internet through an ISP.


My ISP provides me an IP address through DHCP. The address range used
is 192.168.224.0.l

I suggest you not ask Windows to do this work for you, but stick a
router/firewall appliance between your ISP's modem/router, and your own
network. It (not Windows) should be doing NAT, and it can do DHCP for your
internal network, or not (if you prefer to have your Windows box do it,
which might be preferable if you run AD).


I also have 2 internal DCHP servers.

Hmmmm....why?

I first used the address range
192.168.2.x internally. Changing this to 172.16.2.x did not solve the
problem.

The lease period my ISP gives me is 5 minutes.


That's insane! What's their justification for this?

After 2.5 minutes my
system tries to extend the lease, but does not succeed. After 5
minutes it loses the lease. Directly after loosing the lease my
system manages to get another lease with the same IP-address.

The problem is very annoying, especially because of the very short
lease period of my ISP: every 5 minutes all my connections are reset.

Connecting only one other system to my ISP connection works fine:
after 2.5 minutes the lease is extended.

I first thought the problem was with my ISP, but finding out that a
single system is able to extend the lease makes me doubt that now. I
tried to "hide" everything that might look like routing towards my
ISP, as I thought they might nog want me to connect multiple pc's,
but this also didn't solve the problem.

I already reported the problem to my ISP, but no solution yet.
Changing ISP is no option, as it would take a big investment because
I'm on a remote location.

Please advise.



.

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