Mercurial > prosody-modules
changeset 6353:83355cfcad1d
mod_s2s_failclose: Report outgoing connection failures to remote servers
Plugin form of Prosody trunk rev d4a7cc295363 for earlier versions.
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Tue, 30 Dec 2025 23:32:50 +0100 |
| parents | 525655adfd3e |
| children | 7bca4f5935d6 |
| files | mod_s2s_failclose/README.md mod_s2s_failclose/mod_s2s_failclose.lua |
| diffstat | 2 files changed, 23 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_s2s_failclose/README.md Tue Dec 30 23:32:50 2025 +0100 @@ -0,0 +1,9 @@ +This module helps operators of other servers notice when there is a problem with their DNS, firewall, port forwarding or other connectivity issue. +If their server manages to establish a connection in yours, but your server can't connect back, this module closes the first connection with an error. +Hopefully that error shows up in the logs on the other end, where the operator can notice and attempt to resolve the issues. + + Prosody version status + ------------------------ -------------------------- + trunk as of 2025-12-31 This feature is included + 13.0 Works + 0.12 Not tested
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_s2s_failclose/mod_s2s_failclose.lua Tue Dec 30 23:32:50 2025 +0100 @@ -0,0 +1,14 @@ +module:set_global(); +local errors = require "prosody.util.error"; +local incoming_s2s = prosody.incoming_s2s; + +-- When an outgoing connection fails, close a corresponding incoming connection with a stream error to indicate the problem to the remote +module:hook("s2s-destroyed", function(event) + local s2sout = event.session; + if s2sout.type ~= "s2sout_unauthed" then return end + for s2sin in pairs(incoming_s2s) do + if s2sin.from_host == s2sout.to_host and s2sin.to_host == s2sout.from_host then + s2sin:close(errors.new({ condition = "reset", text = "Could not deliver return stanzas, please check your DNS and firewall" })); + end + end +end);