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Community Member

PIX 515 Ver 6.3(3) Blocking Internal traffic

Firewall had blocked access to the internal IP address which was mapped with a public IP address. This occured after I tried connecting the server directly to the public IP address bypassing the pix.

static (inside,outside) 0

I was not able to connect the internal 145 from outside address. In order to test the application I tried placing this system directly with public ip and it worked. Now when I place the system back behind the firewall replacing the IP back to, it works on the internal network but firewall does not allow traffic through and I cannot even access internet. It had occured with three internal IPs and I have to change the ip to make the system work. I understand somewhere these ips are recorded in ACL denying access. Can someone tell me how to fix this problem so that I can use these IPs again on the network?


Re: PIX 515 Ver 6.3(3) Blocking Internal traffic


did u try clear xlate before getting the server behind the local lan network ?? if you havent can you give a try and check ?


Community Member

Re: PIX 515 Ver 6.3(3) Blocking Internal traffic

Modify your netmask to make it host based as opposed to network and you need to create seperate statics for each host.

The following command maps an inside IP address ( to an outside IP address (

hostname(config)# static (inside,outside) netmask

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