hardware:gretunnel
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On the gateway machine with IP 192.169.2.81
ip tunnel add gre1 mode gre remote 192.168.2.99 local 192.168.2.81 ttl 255 ip link set gre1 up ip addr add 10.200.200.201/30 dev gre1
Confirm the route is present
ip route 10.200.200.200/30 dev gre1 proto kernel scope link src 10.10.10.99 172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown 192.168.2.0/24 dev enp2s0 proto kernel scope link src 192.168.2.99
Use IPTables to NAT to the remote GRE
iptables -t nat -A PREROUTING -p udp --dport 5111 -j DNAT --to-destination 10.200.200.202:5111
On the Trisul probe machine with real IP 192.168.2.99
ip tunnel add gre1 mode gre remote 192.168.2.81 local 192.168.2.99 ttl 255 ip link set gre1 up ip addr add 10.200.200.202/30 dev gre1
Credits
Creating a GRE tunnel http://ask.xmodulo.com/create-gre-tunnel-linux.html
hardware/gretunnel.1546693767.txt.gz · Last modified: 2019/01/05 18:39 by veera