I wanted to ask if we can create rules for udp like accept only packets containing a string lets say for example it contains string hi and i want to allow only it while blocking the rest and/or hex byte 2e on byte 30 or using u32 Binary for example 28=0xffffffff – which will block all packets containing /xff/xff/xff/xff after byte 28
Also, If its possible to add alot of ips in a single rule in it to block packets from those ips.