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Network interfaces R77.30

I have a client with two 5200 appliances in HA (redundant) configuration. Running SBS 2011,  internal web server and mail server have been published on the same public IP address ( and same internal IP address (  Now moving to separate internal servers for web ( and mail ( Obviously need separate public IPs for 443 traffic on both. Question:  how to configure network interfaces?  Existing Internet is on Eth1 port.  Trying to add additional Internet IP(  on port Eth3 results in " conflicts with destination network of Eth1".

Do I need to add as an alias to port Eth1?

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Re: Network interfaces R77.30

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Re: Network interfaces R77.30

You do not create the IP on the gateway itself on any interface, you only create a NAT entry in the dashboard, preferably an automatic NAT, which will also take care of your Proxy ARP. 

Regards, Maarten
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