Fix ssh with auth (cert) fowarding (ssh -A) to work with screen Run this script prior to attaching or launching screen, and it will generate a file named "fixssh" exporting a series of envvars. Once on screen you must source ~/fixssh to use your machine's cert intead of the remote's one.

grabssh

#!/bin/sh
SSHVARS="SSH_CLIENT SSH_TTY SSH_AUTH_SOCK SSH_CONNECTION DISPLAY"

for x in ${SSHVARS} ; do
    (eval echo $x=\$$x) | sed  's/=/="/
                                s/$/"/
								s/^/export /'
done 1>$HOME/fixssh