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NAT a range of TCP ports to an internal IP address on pix 506E


From: "Chris Smith" <chris.smith () 1pointe com>
Date: Wed, 23 Jan 2008 10:50:55 -0800

Best regards firewall list readers!

We have a Cisco pix 506E running software version 6.3 (5)

We also have a VOIP server on the internal network at 192.168.1.6.  We need to NAT a range of TCP ports to this VOIP 
server.  The port range is 49152 through 49214.

The connections come in from the internet and need to be natted through the pix to this internal VOIP server.
We believe we already have the access list rules in place to allow the connections.  We just need a translation rule to 
allow this group of ports.


The IP address of the internal interface on the pix is 192.168.1.2

The command that is not working is:

static (inside,outside) x.x.x.x 192.168.1.6

We are currently getting this error when trying to setup the rule.

WARNING: mapped-address conflict with existing static
    tcp from inside:server/80 to outside:x.x.x.x/80 netmask 255.255.255.2
55
WARNING: mapped-address conflict with existing static
    tcp from inside:server/25 to outside:x.x.x.x/25 netmask 255.255.255.2
55
WARNING: mapped-address conflict with existing static
    tcp from inside:server/110 to outside:x.x.x.x/110 netmask 255.255.255
.255

Any insight is appreciated.
Thanks to all.
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