ssh -A -t userone@hostone ssh -A -t -p<port2> usertwo@hosttwo
ssh userone@hostone -L <localport>:hosttwo:<port2> -f -N
scp -P<localport> <filetoupload> usertwo@localhost:.
ssh -A -t userone@hostone ssh -A -t -p<port2> usertwo@hosttwo
ssh userone@hostone -L <localport>:hosttwo:<port2> -f -N
scp -P<localport> <filetoupload> usertwo@localhost:.