traceroute between internal routers fails on in between host

RouterOS General
1

Test my network

I noted that an in-between router 10.100.2.5 drops 100%.
Yet I can ping just fine.

[sjwrick@main] /tool traceroute 10.100.17.1

ADDRESS LOSS SENT LAST AVG BEST WORST STD-DEV STATUS

1 10.100.0.4 0% 10 0.6ms 0.6 0.5 0.9 0.1
2 100% 10 timeout
3 10.100.17.1 0% 9 14.9ms 12.2 5.5 25.7 6

[rboucher@CloudCore3] > ping 10.100.2.5
SEQ HOST SIZE TTL TIME STATUS
0 10.100.2.5 56 63 3ms
1 10.100.2.5 56 63 10ms
sent=2 received=2 packet-loss=0% min-rtt=3ms avg-rtt=6ms max-rtt=10ms

What would be causing this?

2

Check the firewall. Traceroute uses UDP (on Linux) to do its magic. Maybe the router’s firewall is dropping them. The ping is something completely different, and is getting through.
https://en.wikipedia.org/wiki/Traceroute#Implementation