On Wed, Apr 12, 2023 at 05:37:32PM +0000, Albretch Mueller wrote: > I have found a few examples and "explanations" but in the cases of > the examples I have seen by other people, like: Quoth the man page: This program attempts to trace the route an IP packet would follow to some internet host by launching probe packets with a small ttl (time to live) then listening for an ICMP "time exceeded" reply from a gateway. We start our probes with a ttl of one and increase by one until we get an ICMP "port unreachable" (or TCP reset), which means we got to the "host", or hit a max (which defaults to 30 hops) [...] If there is no response within a certain timeout, an "*" (asterisk) is printed for that probe. So that means that the probe for the TTL in question "got lost": either the router at that distance doesn't want to send an ICMP our way or there's something in between eating ICMPs. Cheers -- t
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