External NAT Stops Working

[Bigtruck]

I have recently upgraded from FW-4.0 to NG FP3 running under W2K. But I have a problem, whereby after approximately 24 hours you cannot get access to the servers within the DMZ from the external side of the Firewall. The servers within the DMZ have a static NAT address assigned and do work for so long, then for no apparent reason they stop.
I can still get to the servers' external IP address from the Private network, but anyone accessing them externally cannot get to them.
Currently the only way I can resolve the problem is to reboot the Firewall, which is not a good solution, but it does work straight away.
Thanks for any assistance.

 

[ChrisAC]

This sounds like an ARP problem. Have you entered all the external addresses that are being NATed in local.arp?

Chris.


**********************
Chris Andrew, CCNA, CCSA
chris@iproute.co.uk
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[Bigtruck]

Chris

I thought it might be an ARP problem, but if that was the case it would not work at all, whereas currently it does work for about 24 hours and then the firewall needs rebooting. All the ARP entries have been entered as we have done the NAT config, the local.arp file does not exist.

Paul.