so that i stop wondering what this 8448 port is about in my pf rules..

the port is used by server-to-server/federation communications, its been
registered at iana since last august.

ok ?

Index: services
===================================================================
RCS file: /cvs/src/etc/services,v
diff -u -r1.106 services
--- services    7 Dec 2023 14:53:31 -0000       1.106
+++ services    3 Jun 2024 18:07:37 -0000
@@ -274,6 +274,7 @@
 afs3-rmtsys    7009/tcp                        # AFS remote cache manager service
 afs3-rmtsys    7009/udp                        # AFS remote cache manager service
 puppet         8140/tcp                        # Puppet master service
+matrix-fed     8448/tcp                        # Matrix Federation
 ub-dns-control 8953/tcp                        # unbound dns nameserver control
 git            9418/tcp                        # git pack transfer service
 git            9418/udp                        # git pack transfer service