1 This is used to modify the IPv4 TTL header field. The TTL field determines 2 how many hops (routers) a packet can traverse until it's time to live is 3 exceeded. 4 .TP 5 Setting or incrementing the TTL field can potentially be very dangerous, 6 so it should be avoided at any cost. 7 .TP 8 .B Don't ever set or increment the value on packets that leave your local network! 9 .B mangle 10 table. 11 .TP 12 .BI "--ttl-set " "value" 13 Set the TTL value to `value'. 14 .TP 15 .BI "--ttl-dec " "value" 16 Decrement the TTL value `value' times. 17 .TP 18 .BI "--ttl-inc " "value" 19 Increment the TTL value `value' times. 20