Hello,

It seems that the named TCP alias feature doesn't accept any uppercase letter.

The following commands are working :

ssh -R local:22:127.0.0.1:22 sish.server
ssh -R loc-al:22:127.0.0.1:22 sish.server
ssh -R local123:22:127.0.0.1:22 sish.server

The following commands are NOT working ("remote port forwarding failed for listen port") :

ssh -R Local:22:127.0.0.1:22 sish.server
ssh -R locAl:22:127.0.0.1:22 sish.server
ssh -R LOCAL:22:127.0.0.1:22 sish.server

As hostnames are case insensitive and we need to avoid collisions, shouldn't sish just lowercase the user input instead of throwing an error ? (same for -L tunnels)

Thank you!

Olivier