PIX Transparent mode config problem

Unanswered Question
Jul 18th, 2008


I have 2 networks in my LAN, i.e 192.168.1.X and 192.168.100.X

I am using PIX 7.0(5) between the two networks

PIX is configured in tranparent mode,

now I am unable to ping from one network to another,

Kindly let me know the reason for the above scenario,and also is there any alternate way to connect between 2 networks

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Overall Rating: 2 (1 ratings)
srue Fri, 07/18/2008 - 19:11

pix in transparent mode acts as nothing more than a bridge, a proverbial 'bump in the wire'. ie, both networks on either side of the pix MUST be in the SAME network/subnet in order to communicate. you need to either re-address one side of your network to match the other, or put the pix back in routed mode.

kirankumarhm Fri, 07/18/2008 - 19:15

Thanks for reply,

if I put back to routed mode, is it possible to talk to each other network, because i tried that aswell, it didn't worked for me,

srue Fri, 07/18/2008 - 19:18

you will need to put an ACL inbound on which ever interface is the outside interface because traffic from the outside cannot, by default, enter the firewall...afterall, it is a firewall.

traffic from the inside interface (by default security level of 100) can get to hosts on the outside by default.

i left a bunch of stuff out, but hopefully this little bit will get you started.


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