Another example would be to use port forwarding to map incoming SMTP traffic (Port 25) to Port 26 on your internal server. A possible use is to let a spam filter receive your mail before passing it on to your mail server. If the filter and the mail server are on the same box, they can't both receive on Port 25. You could let the filter receive on Port 26 in which case you would need to forward external Port 25 traffic to Port 26 internally.
i guess port forwarding is to direct traffic from where you receiving it, to you want it...
- A port can only be used by one program at a time.
- Every IP address is divided up into many ports. When one computer sends data to another computer, it sends it from a port on an ip address to a port on an ip address.
- Port Forwarding simply tells the router which computer on the local area network to send the data to. When you have port forwarding rules set up, your router takes the data off of the external ip address:port number and sends that data to an internal ip address:port number.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...