Linux Service Erection--traceroute command

Role:

A router, gateway that looks at which IP addresses the packet passed through during transmission.

Working principle:

First send a TTL of 1 UDP packets to the remote host, according to the protocol, the router receives the packet, the TTL value minus 1, when the TTL is 0, the router discards the packet, and sends the sender back an ICMP packet, the packet contains the router's own IP address. Similarly, the host that executes the traceroute host continues the project to send a UDP packet ttl of 2, you can know the address of the second station router.

In fact, some routers or destination hosts do not respond to ICMP packets, or the packets that are returned are blocked by a fire wall halfway through.

Common options:

-f Specifies the starting TTL value of the packet, which defaults to 1

-N Do not name resolution for IP address

Personally feel that this command does not have much effect because the basic receive routing information ....

Linux Service Erection--traceroute command