Increase performance with filter or pass-rules

[Martin Olsson <elof () sentor se>]

I have a sensor that monitors a network where there's lots of VPN-traffic (esp).

Esp is an encrypted protocol, so there's no point that snort looks for
plaintext data within these packets.

Can snort make a pass-rule for the esp protocol, or does it only support
ip, udp, tcp and icmp?


Related question:
Is it a bad thing to use a bpf filter to exclude esp?
Is it bad to filter out all tcp/22 and tcp/443 and other encrypted
protocols?

/Martin



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