SSH Frequently Asked Questions

SSH:TDG

SSH Frequently Asked Questions

Access Control

I'm trying to use TCP wrappers (libwrap), but it doesn't work.
I want to require different forms of authentication based on the source address of the connection (where the user is coming from).

Authentication

Comparisons

What's the difference between...

File Transfer (scp, sftp, FTP)

I'm trying to scp using an OpenSSH client to an SSH2 server. ssh works fine, but scp returns this:
Executing ssh1 in compatibility mode failed
When I try to use sftp or scp2, I get a message like this:
Received message too long (or "Bad packet length") 1416586337
and the connection fails. What's wrong?
I want to use sftp in a script, but it doesn't work — I can't use "here documents," and it keeps trying to prompt for stuff.
How do I allow a user to use scp or sftp, but not allow regular ssh (i.e. forbid getting a shell or running other programs)?

Port Forwarding

TCP port forwarding and the -g (GatewayPorts) option

X Forwarding

Miscellaneous

Bugs & Problems