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Can Two Interfaces Of A Firewall Can Share Same Ip


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#1 nazeema

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Posted 09 May 2008 - 01:34 AM

Hi all,
can two interfaces of a firewall can share same IP, I have configured it to my firewall but i feel there is a problem as the packets are not reaching the firewall.

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#2 raw

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Posted 09 May 2008 - 08:15 PM

The simple answer is no...two interfaces can not share one IP address.
Is this a hardware firewall?
Provide more info about your network and what you are trying to accomplish.

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#3 nazeema

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Posted 12 May 2008 - 12:59 AM

hi raw,
Yes this is a hardware firewall, I am giving DMZ' interface and external interface as same public IP.

#4 bandit21

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Posted 12 May 2008 - 11:49 AM

hi nezeema,

based on the information that you have given I belive your trying to setup 2 servers behind your firewall right? now this is possible at some point since 2 of your servers have a unique local IP addresses that you have assigned you just need to configure the firewall so that it could send the appropriate information back to the specific server more or less you could check if your hardware firewall has a feature callled protocol binding.

regards

#5 nazeema

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Posted 12 May 2008 - 11:49 PM

hi bandit21,

yes am running a server in DMZ, client in WAN and a client in LAN.

DMZ server:12.12.12.50 and gateway:12.12.12.1
WAN client:12.12.12.40 and gateway:12.12.12.1
LAN client:192.168.60.10 and gateway:192.168.60.1

clients are registered to the DMZ server and these two clients are communicating with each other. Now my problem is packets from WAN user side are not reached at the firewall.




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