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Checking for double NAT

Double NAT occurs when two routers are used on the same network. This can cause issues with peer-to-peer connectivity

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Written by Adine
Updated over a week ago

How to check

Run a traceroute and look at the first two IP addresses.

If both are private IPs, you are behind double NAT.

Private IP ranges:

  1. 10.0.0.0 – 10.255.255.255

  2. 172.16.0.0 – 172.31.255.255

  3. 192.168.0.0 – 192.168.255.255

What to do

  1. Use a single router if possible

  2. Enable bridge mode on one router

  3. Contact your ISP if needed

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