| Building The Network You Need With PF, The OpenBSD Packet Filter: BSDCan 2016, Ottawa, Canada, June 8th 2016 | ||
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Traditional traceroute needs a bit of help, but uses a fixed formula:
# allow out the default range for traceroute(8): # "base+nhops*nqueries-1" (33434+64*3-1) pass out on $ext_if inet proto udp to port 33433 >< 33626
This is the stuff you find in list archives - openbsd-misc (e. g. http://marc.info/)
Note: Unix traceroute uses UDP by default; Microsoft uses ICMP ECHO (like unix with -I)