New to crowdsec - conntrack full after installing crowdsec
Uh, hi. I'm pretty new to crowdsec in general, so please pardon me if this is a stupid question. I recently just installed crowdsec replacing fail2ban on my 2 servers, after installing it, I seem to be starting to get some alert from netdata that the conntrack limit is at 100%, which I presume is a bad thing. I'm wondering if there's any config from crowdsec that I can use to help with this? Thanks
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I suggest bumping conntrack limit and decreasing some tcp settings especially for closing connections due to timeout, because defaults are pretty low for current hardware capabilities
Uh, can I know what limit I should set and what settings I should change..? I'm pretty new to this 😅
https://gist.github.com/bouroo/bc52ad58a6e75d44e5235b229e9ca988#file-80-k8s-conf for a start of reading more about those settings
generally just increate conntrack max and buckets and see how it goes
https://gist.github.com/hrchu/2eb6388408de3df59962#file-99-network-tuning-conf-L74 and this section about tcp timeouts
anything else can be left as is and see how it goes
Uh, for this, what section should I use? I see that there's section for Kernel 2.4 or Kernel 3, I'm all the way up Kernel 6.x so, I should use the section for Kernel 3.x right?
uname -r should return kernel version
you don't need to adjust all of it
also you can check it via systctl -a |grep conntrack to see which values you can set, it's probably net.netfilter unless you are on some ultra ancient hardware/os