http://www.perlmonks.org?node_id=11856


in reply to How do I increase the TTL on a socket?

I found my own answer:
use Socket; $host="somehost"; socket(SOCK,PF_INET, SOCK_RAW, getprotobyname('icmp')) || die $!; send (SOCK, pack("C2 S5", 17, 0, 0xc898,0x2667,0,0,0),0,sockaddr_in (0 +,inet_aton($host))) || die $!; ^
The flag was just set wrong, I also found out how to change the TTL (at least for Solaris):
setsockopt (SOCK,0,4,<TTL>);