This module matches the time to live field in the IP header.
.TP
.BI "--ttl-eq " "ttl"
Matches the given TTL value.
.TP
.BI "--ttl-gt " "ttl"
Matches if TTL is greater than the given TTL value.
.TP
.BI "--ttl-lt " "ttl"
Matches if TTL is less than the given TTL value.