GRE Tunnel on Linux
| #!/bin/sh | |
| INTERFACE="gre_yy_zz" | |
| LOCAL_ADDR="72.30.35.9" | |
| REMOTE_ADDR="172.217.161.78" | |
| GRE_CIDR="10.33.0.1/30" | |
| ip link set $INTERFACE down | |
| ip tunnel del $INTERFACE | |
| ip tunnel add $INTERFACE mode gre remote $REMOTE_ADDR local $LOCAL_ADDR ttl 255 | |
| ip link set $INTERFACE up | |
| ip addr add $GRE_CIDR dev $INTERFACE | |
| iptables -A INPUT -p gre -s $REMOTE_ADDR -j ACCEPT | |
| iptables -A INPUT -i $INTERFACE -j ACCEPT | |
| iptables -A FORWARD -p gre -j ACCEPT |
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