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=== strongSwan to MikroTik ===
=== strongSwan to MikroTik ===
Use the following configurations to connect a system running stongSwan<ref>strongSwan Official Site [https://www.strongswan.org/]</ref> to a MikroTik<ref>MikroTik Official Site [https://mikrotik.com/]</ref> device using IPSEC.
Use the following configurations to connect a system running strongSwan to a MikroTik<ref>MikroTik Official Site [https://mikrotik.com/]</ref> device using IPSEC.
==== strongSwan config ====
==== strongSwan config ====
==Persistent SSH Tunnels==
==Persistent SSH Tunnels==
The following is how to create a persistent SSH Tunnel between two systems. This is handy if you want to secure data flowing across networks, or even setup a tunnel without messing with VPN configuration.
The following is how to create a persistent SSH Tunnel between two systems. This is handy if you want to secure data flowing across networks, or even setup a tunnel without messing with VPN configuration.
Now switch to the user and generate an SSH key:
Now switch to the user and generate an SSH key:
<pre>
<pre>
su -s /bin/bash useradd
su -s /bin/bash autossh
cd ~
cd ~
ssh-keygen -b 4096
ssh-keygen -b 4096
===Copy public key to target system===
===Copy public key to target system===
You will need to copy '''''id_rsa.pub''''' file from '''''/home/useradd/.ssh/''''' to the '''''authorized_keys''''' file on the remote system you want to connect to for the tunnel.
You will need to copy '''''id_rsa.pub''''' file from '''''/home/autossh/.ssh/''''' to the '''''authorized_keys''''' file on the remote system you want to connect to for the tunnel.
''Note: It is recommended that you also create a normal user on the remote system and not use root.''
''Note: It is recommended that you also create a normal user on the remote system and not use root.''
===Setup script===
===Setup script===
Copy the following script, making the necessary changes as specified between the <> and place on the system that will initiate the tunnel (usually /opt):
Copy the following script, making the necessary changes as specified between the <> and place on the system that will initiate the tunnel (here we will save it as /opt/ssh-tunnel.sh):
<pre>
<pre>
#!/bin/sh
#!/bin/sh
#
#
su -s /bin/sh autossh -c 'autossh -M 0 -N -o "ServerAliveInterval 30" -o "ServerAliveCountMax 3" -o "ExitOnForwardFailure=yes" -f -T -R localhost:<target port>:<local IP or localhost>:<local port> <user>@<domain>'
su -s /bin/sh autossh -c 'autossh -M 0 -N -o "ServerAliveInterval 30" -o "ServerAliveCountMax 3" -o "ExitOnForwardFailure=yes" -f -T -R localhost:<target port>:<local IP or localhost>:<local port> <user>@<domain>'
</pre>
</pre>
{| class="wikitable"
{| class="wikitable"
<pre>
<pre>
chmod +x <name_of_script>.sh
chmod +x /opt/ssh-tunnel.sh
</pre>
</pre>
===Tunnel at startup===
===Tunnel at startup===
To have this tunnel automatically start if the system is rebooted, add a call to the script to rc.local.
To have the tunnel up when the system restarts, choose one of the following methods
====rc.local====
Add a line to /etc/rc.local that calls the script.
<pre>
<pre>
/opt/<name_of_script>.sh
# Start AutoSSH tunnel at boot
/opt/ssh-tunnel.sh
</pre>
</pre>
''Note: You may have to enable rc.local on Ubuntu and Debian based systems via systemd. Refer to your distributions documentation for information on how to enable it.''
''Note: You may have to enable rc.local on Ubuntu and Debian based systems via systemd. Refer to your distributions documentation for information on how to enable it.''
====systemd====
To have the script start at boot with systemd, create the following file and add it to /etc/systemd/system/ssh-tunnel.service
=====ssh-tunnel.service=====
<pre>
[Unit]
Description=AutoSSH Tunnel at boot
[Service]
Type=oneshot
ExecStart=/opt/ssh-tunnel.sh
[Install]
WantedBy=multi-user.target
</pre>
=====Enable service=====
To enable the service to run via systemd run:
<pre>
systemctl enable ssh-tunnel.service
</pre>
== GRE Tunnel ==
== GRE Tunnel ==