 | 1 | initial version |
There's no rule or requirement that a packet needs to be created with a TTL of 255. Any TTL which is deemed to give the packet enough reach through the internet suffices.
The IETF has to say something about that, in RFC 1122, section 3.2.1.7. It states "The current suggested value will be published in the "Assigned Numbers" RFC", which we now find at IANA.
IANA currently says in its "Internet Protocol Version 4 (IPv4) Parameters" for "IP Time to Live Parameter": "The current recommended default time to live (TTL) for the Internet Protocol (IP) is 64 [RFC791][RFC1122]."
So even 250 can be considered high.
