Can a ping pass if the intermediate router has disabled icmp?

E

Evgeny Petryaev2021-05-21 22:32:42

Computer networks

Evgeny Petryaev, 2021-05-21 22:32:42

That is, IPs before will be displayed, but will those who are after be displayed?

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2 answer(s)

K

ky0, 2021-05-21
@ky0

If transit ICMP packets are disabled on the intermediate node, everything after that will fall off. If you forbid those sent to yourself, only this hop will fall off.

V

Vladimir Dubrovin, 2021-05-24
@z3apa3a

It all depends on what you really need and what exactly is prohibited on the router, because. completely ICMP on routers do not prohibit. Regular ping to hosts behind the router will not work.
PS If the intermediate router still completely banned ICMP, then you have problems, because. ICMP is needed to find the path MTU, this is called the blackhole router problem and, to put it mildly, deserves blame. You may have floating problems with strange symptoms (for example, GET requests may work with some server and POST does not work).