We help IT Professionals succeed at work.

Port forwarding on router: Selecting BOTH UDP and TCP?

When setting up port forwarding on a router, when in doubt, is it ok to select *both* UDP and TCP? Any harm?
Comment
Watch Question

Top Expert 2015
Commented:
Nope, no harm.

The difference is that UDP is a connectionless protocol... so just pumps data down the line and expects the recipient to deal with it, any bad bits and it doesn't care.

TCP established a connection first, then checks each packet is valid, and requests a resend if a bad packet is found.

Best practice for firewalls is least access, but it won't do any damage....

Author

Commented:
Thanks, very clear answer.