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Update ICMP message for rejected packets#360

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JackDoan merged 1 commit into
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JackDoan-patch-1
Jun 17, 2026
Merged

Update ICMP message for rejected packets#360
JackDoan merged 1 commit into
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JackDoan-patch-1

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Deploying docs-nebula with  Cloudflare Pages  Cloudflare Pages

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@jasikpark

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Verified this against the merged Nebula change (slackhq/nebula#1766) — the IPv4 reject packet now sends ICMP type 3 / code 13, so the correction is accurate. 👍

One small consistency nit: Nebula's own source comment and examples/config.yml both phrase code 13 as "Communication administratively prohibited". This wording drops "Communication". Suggest matching the upstream phrasing exactly so the two sources line up:

For other protocols, this will be an ICMP "Destination unreachable: Communication administratively prohibited" packet.

(IANA's official name for type 3 / code 13 is likewise "Communication Administratively Prohibited".)

@JackDoan JackDoan merged commit 21bad0d into main Jun 17, 2026
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@JackDoan JackDoan deleted the JackDoan-patch-1 branch June 17, 2026 20:35
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