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--- xifnet:procedures:ssh_tunnel [2017/05/21 13:52] – xif
+++ xifnet:procedures:ssh_tunnel [2017/05/21 13:52] (current) – xif
@@ Line 1: / Line 1: @@
+====== Incoming SSH tunnels with the XifNet ======
+No UPnP on ur network ? Can't open NAT ports ? Too bad... \\
+Well, there is a solution : **SSH Tunnels**. Let's see how.
+__On ur machine__ :
+  - ''ssh-keygen -t ed25519 -f .ssh/sshtun''
+  - Copy ur pub key (''cat .ssh/sshtun.pub'')
+  - Configure the distant machine (read below)
+  - Start the service on port ''[XXX]''
+  - Choose port ''[YYYY]'' for the service (''YYYY'' > 1024)
+  - ''ssh -f -N -T -R[YYYY]:localhost:[XXX] sshtun@[disthost].net.xif.fr -o IdentityFile=~/.ssh/sshtun''
+  - ''ioslaves-master [me] [disthost] -C --open-port=[YYYY]''
+  - Enjoy : connect to the service at ''[disthost].net.xif.fr:[YYYY]''
+__On the XifNet distant machine__ :
+  - ''useradd sshtun -s /bin/nologin''
+  - ''sudo -u sshtun sh -c "cd ~ && mkdir -m 700 .ssh && nano .ssh/authorized_keys && chmod 600 .ssh/authorized_keys"''
+    * In ''authorized_keys'' : add ''no-pty,no-agent-forwarding ssh-ed25519 [the_key] [the_host]''
+  - Edit ''/etc/ssh/sshd_config'' and set
+    * ''GatewayPorts yes'' to enable listening on ''*'' iface
+    * ''PermitTunnel yes''
+  - ''systemctl restart sshd''
+And then admire ur work with ''lsof -Pi''
+__Note__ : ''sshtun@nashorn.net.xif.fr'' is already configured so.