- The operating systems I use are Ubuntu /Debian & Alpine/Windows
- If you are still under centos get out of my github ๐๏ธ
- In the cellar you will find some interesting scripts
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Simplier and more efficient approach to blackholing networks.
Since you operate an Autonomous System with BGP feeds, if you receive full tables, you can simply drop any routes to any networks that you do not want to be reachable from your network. By doing this you generally would reduce both your CPU and RAM usage on any of your provider edge Linux routers.
For example if using bird you could add a as list of the banned ASNs. i.e.:
define drop_ASNs = [
376,
4134,
22652,
34534,
35911,
63385
];
And then simply drop either any routes which include the ASNs. i.e. add this into your filters:
if (bgp_path ~ drop_ASNs) then reject;
Or then simply any routes that only originate from the banned ASNs but not any transiting. i.e. add this into your filters:
if (bgp_path.last ~ drop_ASNs) then reject;
Hope this helps,
Keaton A.G. Lair
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