Tired of manually checking for router entries to find if you or your customers accidentally created a routing loop? Want to help ISPs or conduct scientific studies on the WAN? Look no further, because this program can help you!
What RouteLoop can do:
- Look for routing loops by pinging networks and seeing if a "ttl exceeded" gets replied
- Work fast or slow
- Pick IP-Addresses at random to avoid cluttering up a network
- Provide you with inspiration for your own tools
What RouteLoop cannot do:
- Actually fix these routing loops
- Look into configurations of routers
- Provide a breakfast (you are probably looking for Fruit Loops)
Please use with caution, and with your own risk. There are mechanisms in place to prevent an accidental DOS attack, but you should still be careful.
- Install requirements with
pip install requirements.txt - Launch the program:
python3 main.py [Network] [Delay] [Optional: --v]
with Network as your IPv4-Network in CIDR-Notation and Delay in milliseconds (A delay of 0 means no delay). --v prints out the progress of the application, but potentially reduces speed. If not specified, the program will only print out
the suspected Loops (IPv4-Addresses for which the TTL exceeded in transit)
Really, math? Yes, this is to estimate the duration of the scan, or rather, the net waiting time. A /24 network for example has 2 to the power of 32-24 hosts, namely 256. Divide that by the milliseconds you specified and it should provide you with a reasonable estimate, provided, your network speed is fast enough. If you don't want delay, the network delay and bandwidth can limit the speed, but a few milliseconds already are slower than that and cancel out the effects. The program shows the speed estimate when verbose is specified however.
- Add support for exporting results
- Add support for IPv6
- Port the program to C