External IP aliases not working

Article #:

Product

Castle

1027

 

 

Summary

 

Problem

Multiple external IP aliases are not working — What should I be looking at?

This is likely to be an ARP cache issue.

Solution

If the alias IPs you have defined cannot be pinged from outside, or configured port forwards are not working, it is possibly due to a stale ARP cache issue.

Try resetting the ARP cache on the router in front of the Smoothwall firewall — on some routers this may require a reboot.

Also make sure that the IP addresses used, are being routed to your Smoothwall, and that no other machines are using the same IP addresses.

Attribution:

Last updated:

Author:

Contributions by:

25 August 2016

 

Tanja

 

 

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