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gabrie

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Hi

My ISP unfortunately thinks of a fixed IP address as an DHCP lease based on my MAC address. So the WAN interface has to renew its lease every 2h.

I'm constantly having problems renewing the IP. When the firewall (w2k) boots it gets the IP from the ISP without problem. But then after 1 hour (half lease time) the eventlog starts giving me:

Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 00010xxxxx. The following error occured:
The semaphore timeout period has expired. . Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.

And about 1 hour later (end of lease time) the connection drops. When I open a rdp session to the firewall, go to the command prompt and do a ipconfig /renew, it gets the ip adress again. What is going on here????

Do I need a special rule that would allow dhcp? Why does ipconfig /renew work without that rule?

Gabrie
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feite

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Add the following rule:

name: ISP DHCP
source: firewall
dest: dhcp server of ISP
service: DHCP
action: allow

Because the ip address is linked to your MAC you could try to enter the ip address as a fixes address. No DHCP problems...
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gabrie

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Hi

I thought of entering a fixed IP (which is the same as the one from the ISP DHCP), but was affraid that they could change things without letting us know.

But I'm gonna try the rule you gave me.

Thanks
Gabrie
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