added leyk and gfe to ssh-config

.ssh/config

     RequestTTY yes
     RemoteCommand tmux attach-session -t default_ssh || tmux new-session -s default_ssh
 
+Host ffw_tmux
+    HostName ffw
+    User dirk
+    Port 22
+    RequestTTY yes
+    RemoteCommand tmux attach-session -t default_ssh || tmux new-session -s default_ssh
+
 Host leyk_ext
     HostName leyk
     User dirk
     ProxyJump jump@hettingen_jumphost
     # RemoteCommand tmux attach-session -t default_ssh || tmux new-session -s default_ssh
 
+Host leyk_tmux
+    HostName leyk
+    User dirk
+    Port 22
+    RequestTTY yes
+    RemoteCommand tmux attach-session -t default_ssh || tmux new-session -s default_ssh
+
 Host firewall_tmux
     HostName firewall
     User dirk