when it encountered a packet with the "No not fragment" flag set too big to fit on the next hop, it would return an ICMP type 3, code 4 message with an MTU value of 0 back. the IPS would detect ...

Inside tcp_v4_rcv() (net/ipv4/tcp_ipv4.c), perform TCP header integrity checks. Look for a socket willing to receive this packet (using __tcp_v4_lookup()). If it is not found, take appropriate actions ...

Encapsulation adds a protocol header, so any packets that are created ... does not pay attention to the ICMP “packet too big” messages, and does not perform PMTUD. All IPv6 networks must ...

So simple in fact, that [Hrvoje Čavrak] has recreated it using ICMP packets as its storage, and a custom packet filter as its processor emulation. It’s a project that’s simultaneously both ...

It will generate a 74 byte packet with a 60 byte IP Header, 8 byte ICMP header, and Ethernet Frame size. The maximum size supported is where you can adjust the data options in the ICMP payload to ...

From my point of view PING is not an acronym standing for Packet ... IP header precluded this from measuring very long paths. I was insanely jealous when Van Jacobson of LBL used my kernel ICMP ...

Well, all of your IP traffic can be piped through an ICMP tunnel, disguising all your surfing as simple ping packets. [Thomer] has a detailed guide on how to create and utilize such a tunnel using ...