I can't think of any reason to block any of these (dest unreach, echo req/rep, timeout exceed, or pkt too large)
-----Original Message----- From: Marco Moock via NANOG <[email protected]> Sent: Friday, June 19, 2026 10:36 AM To: [email protected] Cc: Marco Moock <[email protected]> Subject: Re: IPv4 flag day Am 19.06.26 um 05:30 schrieb Gary Sparkes via NANOG: > For ICMP, we really only need timeout exceeded and echo request/reply, packet > too large isn't required (and that's what breaks PMTU) nor is dest unreach. Are there any reason to block ICMP dest unreachable? I never saw one. Breaking PMTU is a PITA - for both IPv6 and IPv4. -- Gruß Marco Junk-Mail bitte an [email protected] _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/4CCLKQVMRHES5OLRJLLIW24HIGCORVBX/ _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/EM7TY5CT4ATWSEXJT2B2LWJZ753KFF4M/
