Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

Port forwarding

Trying to get the router to translate all traffic coming in on port 570 to port 25.

Using this command to do it:

ip nat outside source static tcp [ip address] 570 [ip address] 25

Any suggestions as to where I'm going wrong?

Thanks,

- Brad

1 ACCEPTED SOLUTION

Accepted Solutions
anu
New Member

Re: Port forwarding

When translating addresses to an interface's address, outside-initiated connections to services on the inside network (like mail) will require additional configuration to send the connection to the correct inside host. This command allows the user to map certain services to certain inside hosts.

ip nat inside source static { tcp | udp }

Example:

ip nat inside source static tcp 192.168.10.1 25 171.69.232.209 25

In this example, outside-initiated connections to the SMTP port (25) will be sent to the inside host 192.168.10.1.

referenced from: http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a0080091cb9.shtml

1 REPLY
anu
New Member

Re: Port forwarding

When translating addresses to an interface's address, outside-initiated connections to services on the inside network (like mail) will require additional configuration to send the connection to the correct inside host. This command allows the user to map certain services to certain inside hosts.

ip nat inside source static { tcp | udp }

Example:

ip nat inside source static tcp 192.168.10.1 25 171.69.232.209 25

In this example, outside-initiated connections to the SMTP port (25) will be sent to the inside host 192.168.10.1.

referenced from: http://www.cisco.com/en/US/tech/tk648/tk361/technologies_white_paper09186a0080091cb9.shtml

120
Views
0
Helpful
1
Replies