11-13-2002 10:42 AM - edited 02-20-2020 10:22 PM
Hello all,
I am using a PIX 515E with two interfaces and can't get out from the inside to the outside interface. I don't need or want NAT.
The network is configured as follows...
router <---> pix <----> switch
Without the PIX the router's address is 192.168.1.1 and everything works great. After inserting the PIX I changed the router's address to 192.168.2.1 255.255.255.0.
The PIX is configured as follows.
nat (inside) 0 192.168.1.0 255.255.255.0 0 0
route outside 0.0.0.0 0.0.0.0 192.168.2.1 1
ip address outside 192.168.2.2 255.255.255.0
ip address inside 192.168.1.1 255.255.255.0
I also created and applied an access-list to the outside and inside interface that allows icmp packets.
When I telnet into the PIX from the inside network I can ping the inside network but can't ping the router. From the inside network I can ping the inside interface but not the outside interface.
Can anyone tell me what I have missed or am doing wrong?
Thanks in Advance
Warren Johnson
11-13-2002 12:47 PM
Warren,
I have a few suggestions.
1st, I would get rid of your NAT 0 configuration. NAT0 is *always* a bad idea, unless you are by-passing nat for a VPN tunnel.
If you don't want a network to be translated, I would highly advise that you static the network to itself,
i.e. static (inside,outside) 192.168.1.0 255.255.255.0 192.168.1.0 255.255.255.0
2nd, the router probably needs to have it's arp-cache cleared with the command "clear arp"
I would issue that command on the Router as well as the PIX.
3rd, Have you verified that there is a route on your router pointing to the 192.168.1.0/24 network? Make sure that it is reachable via the PIX on the router..
i.e
ip route 192.168.1.0 255.255.255.0 192.168.2.2
Hope that helps
-Bryan
11-13-2002 02:01 PM
Bryan,
Thanks, I haven't tried your suggestions yet, but I'm sure the 3rd suggestion is one of the problems. I forgot to add the route back after changing the IP address on the router.
Thanks again.
Warren
11-13-2002 02:11 PM
Warren,
Anytime. I hope it works out for you
-Bryan
11-14-2002 05:17 AM
Bryan,
I have a few more questions :-).
1. You seem to know what your talking about when you say not to use NAT 0, but I was wondering if you could enlighten me as to the reasons for that.
2. By not using NAT on the PIX does the PIX then become a transparent device as far as routing goes. Will any routes or tunnels that I have setup on the router still work?
Thanks again for your help.
Warren
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