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Most of the code ist stolen from: http://wiki.ubuntuusers.de/Tinc
Make sure that you replace:
* <gateway-node> -> name of the gateway node in tinc
* <tinc-internal-ip-of-gateway>
* <eth0-or-ens3>
# Client
curl tinc.krebsco.de | sh
# edit /etc/tinc/retiolum/tinc.conf to use only the nodes you would like to
# connect to
cd /etc/tinc/retiolum/hosts
cat > <gateway-node>-up <<EOF
#!/bin/sh
VPN_GATEWAY=<tinc-internal-ip-of-gateway>
ORIGINAL_GATEWAY=`ip route show | grep ^default | cut -d ' ' -f 2-5`
ip route add $REMOTEADDRESS $ORIGINAL_GATEWAY
ip route add $VPN_GATEWAY dev $INTERFACE
ip route add 0.0.0.0/1 via $VPN_GATEWAY dev $INTERFACE
ip route add 128.0.0.0/1 via $VPN_GATEWAY dev $INTERFACE
EOF
cat > <gateway-node>-down <<EOF
#!/bin/sh
ORIGINAL_GATEWAY=`ip route show | grep ^default | cut -d ' ' -f 2-5`
ip route del $REMOTEADDRESS $ORIGINAL_GATEWAY
ip route del $VPN_GATEWAY dev $INTERFACE
ip route del 0.0.0.0/1 dev $INTERFACE
ip route del 128.0.0.0/1 dev $INTERFACE
EOF
systemctl restart tincd@retiolum
# Server
Server is <gateway-node>
# add the key to painload
make -C //retiolum update
# allow ip masquerading
# persist this:
iptables -t nat -A POSTROUTING -o <eth0-or-ens3> -s 10.243.0.0/16 -j MASQUERADE
echo "net.ipv4.ip_forward=1" > /etc/sysctl.d/11-ipforward.conf
sysctl -p
# add to your /etc/tinc/retiolum/hosts/<gateway-node> :
Subnet = 0.0.0.0/0
systemctl restart tincd@retiolum
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