If a port is openned on a hardware firewall, for example, TCP port 25, or any other port for that matter, would any TCP traffic on port 25 be allowed through the firewall? As commonly you would open TCP port 25 for SMTP obviously so SMTP traffic could pass through, but would any other TCP traffic on port 25 also be able to pass through?
Hardware Firewall Question
- Thread starter Rocker
- Start date
if the firewall was just looking at open ports yes, as all it would be doing would be opening port 25 to the outside world. If you had a hardware firewall that was cheking the application layer it would block non-complaint (non smtp) protocols on port 25 if you told it too. The average home router would only open the port it would not check the application layer. A business class firewall could do this though
you could only have one service on the port though at any one time. But for example people sometimes change the remote desktop port from 3389 to something else (i.e. 10000) then open port 10,000 for rdp.
If you had an smtp service running on the port you could not have another service running on the same port
you could only have one service on the port though at any one time. But for example people sometimes change the remote desktop port from 3389 to something else (i.e. 10000) then open port 10,000 for rdp.
If you had an smtp service running on the port you could not have another service running on the same port
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