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| | |-+  Using a gateway on different subnet than WAN IP does not work		 0 Members and 2 Guests are viewing this topic. « previous next »
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Author Topic: Using a gateway on different subnet than WAN IP does not work  (Read 9115 times)
mdseymour00
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« on: Thursday 25 August 2011, 07:16:09 am »
Hello,

Our ISP assigned us a /30 subnet and a /29 subnet on a single Ethernet connection, with instructions to use the gateway in the /30 block for both subnets.

The /30 block gives one usable IP address (network address, firewall address, gateway address). It is in use on one floor of our building with the Endian firewall using the /30 gateway.

I now plan to use the /29 block on a second floor using a dumb switch to split the original Ethernet connection in front of the existing firewall. However, all attempts to assign the firewall an IP in the /29 block and the gateway in the /30 block fails. Do I have to add something to the routing table to get this to work properly?

Regards,
Mike S.
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fqureshi
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Posts: 126
« Reply #1 on: Friday 02 September 2011, 08:31:54 am »
You have to do routing on your EFW box...

Route all traffic of your /29 block on /30 usable IP which you have assigned as gateway.
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