Server to server (S2S): `[[listen.s2s]]`

Handles incoming server-to-server (S2S) connections (federation). The recommended port number for an S2S listener is 5269 as registered in the XMPP protocol.

Note

Many S2S options are configured in the s2s section of the configuration file, and they apply to both incoming and outgoing connections.

Configuration options

`listen.s2s.shaper`

Syntax: string, name of the shaper rule or "none"
Default: "none" - no shaper
Example: shaper = "s2s_shaper"

Name of the rule that determines what traffic shaper is used to limit the incoming XMPP traffic to prevent the server from being flooded with incoming data. The rule referenced here needs to be defined in the access config section, and it should return the shaper name or the value "none".

TLS options for S2S

S2S connections do not use TLS encryption unless enabled with the use_starttls option in the s2s section. You can specify additional options of the TLS encryption in the tls subsection of the listener configuration. Accepted options are: verify_mode, certfile, cacertfile, dhfile, ciphers and protocol_options. They have the same semantics as the corresponding c2s options for fast_tls.

S2S listener configuration example

The following section configures an S2S listener with some basic settings set up. The s2s_shaper access rule is used, which requires a definition in the access section.

[[listen.s2s]]
  port = 5269
  shaper = "s2s_shaper"
  max_stanza_size = 131072
  tls.dhfile = "dh_server.pem"

Server to server (S2S): [[listen.s2s]]