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Note there's also kernel side code for this. Theoretically it's generic, but practically it was written specifically for dropwatch and dropwatch is the only use

Note there's also kernel side code for this. Theoretically it's generic, but practically it was written specifically for dropwatch and dropwatch is the only user of it that I am aware of. https://github.com/torvalds/linux/blob/master/net/core/drop_monitor.c https://github.com/torvalds/linux/blob/master/net/core/drop_...

nh2 6y ago
If you just want to enable it in your kernel (in case your distribution hasn't already), the config option is called `CONFIG_NET_DROP_MONITOR`. I've recently made it on-by-default in NixOS and also collected some info about which other distros already have it on-by-default and since when: https://github.com/NixOS/nixpkgs/pull/85119 https://github.com/NixOS/nixpkgs/pull/85119 dropwatch is very useful, I used it to debug interruptions of our VPN setup between servers.