Routing table simple script

This can help if:

• You need frequent access to Internet resources
• You need access to LAN resources
• Your company uses an Internet proxy for Ethernet but not for Wi-Fi
• Yoy use MacOSX or Linux, therefore not all the SW reads proxy settings (tipycally browsers do, thinks like package managers don't)

Simply edit routing.table.sh and change these lines:

#Set here the interface name you what to use for the exceptional routes
ETH_NAME="en12"

#write here your LAN DNS Server
DNS_IP="22.0.0.1"

#Exception route list. Traffic sent to $DEST_HOSTS and $DEST_NETS will go through $ETH_NAME interface
DEST_HOSTS="10.12.13.14"
DEST_NETS="192.168.0/16 23.4/16"
#you don't need to change anything else

• Replace en12 by your Ethernet interface name.
• Replace 22.0.0.1 by your LAN DNS server IP address.
• Add the IP addresses and/or CIDR Netmask you want to route through the Ethernet cable to DEST_HOSTS and DEST_NETS variables. Use space as delimiter.
• In your network preferences, make sure that Wi-Fi is before Ethernet interface in the "Service Order".

As a result, all the network traffic will go through the Wi-Fi interface excepting whatever goes to DEST_HOSTS and DEST_NETS

This script works in MacOSX Sierra. As every version of UNIX is different, it needs some adaptations to make it work in Linux distributions (netstat command varies, for example). I just made the minimun I needed to solve my issue :-).

Feel free to use at your own risk. PRs welcome.