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Get default interface instead of defaulting to eth0 #15

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Get default interface instead of defaulting to eth0 #15

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2c9069a
Get default interface instead of defaulting to eth0
xfrjared Nov 30, 2018
b255e7a
dumb typo is dumb
jaredhaight Nov 30, 2018
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3 changes: 2 additions & 1 deletion nodes/aws/configs/node_setup.bash
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
#! /bin/bash
sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
DEFAULTETH=`ip route | grep default | sed -e "s/^.*dev.//" -e "s/.proto.*//"`
sudo iptables -t nat -A POSTROUTING -o $DEFAULTETH -j MASQUERADE
5 changes: 3 additions & 2 deletions setup/install.sh
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Expand Up @@ -70,8 +70,9 @@ echo "50 loadb" >> /etc/iproute2/rt_tables
# set rule for openvpn client source network to use the second routing table
ip rule add from 10.10.10.0/24 table loadb

# always snat from eth0
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
# always snat from default ethernet
DEFAULTETH=`ip route | grep default | sed -e "s/^.*dev.//" -e "s/.proto.*//"`
iptables -t nat -A POSTROUTING -o $DEFAULTETH -j MASQUERADE

############################
# post install instructions
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