git: 2da12891daa2 - main - Document another example for "binat".

From: Poul-Henning Kamp <phk_at_FreeBSD.org>
Date: Sun, 22 Jan 2023 09:32:31 UTC 
The branch main has been updated by phk:

URL: https://cgit.FreeBSD.org/src/commit/?id=2da12891daa2ad1c39ced5ef86e3d136f958826c

commit 2da12891daa2ad1c39ced5ef86e3d136f958826c
Author:     Poul-Henning Kamp <phk@FreeBSD.org>
AuthorDate: 2023-01-22 09:31:18 +0000
Commit:     Poul-Henning Kamp <phk@FreeBSD.org>
CommitDate: 2023-01-22 09:31:18 +0000

    Document another example for "binat".
---
 share/man/man5/pf.conf.5 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/share/man/man5/pf.conf.5 b/share/man/man5/pf.conf.5
index c7446f53bb49..2edce7f947eb 100644
--- a/share/man/man5/pf.conf.5
+++ b/share/man/man5/pf.conf.5
@@ -2927,6 +2927,10 @@ nat on $ext_if inet proto udp from any port = isakmp to any -\*(Gt ($ext_if) \e
 # (bidirectional).
 binat on $ext_if from 10.1.2.150 to any -\*(Gt $ext_if
 
+# Translate packets arriving on $peer_if addressed to 172.22.16.0/20
+# to the corresponding address in 172.21.16.0/20 (bidirectional).
+binat on $peer_if from 172.21.16.0/20 to any -> 172.22.16.0/20
+
 # RDR
 # Translate incoming packets' destination addresses.
 # As an example, redirect a TCP and UDP port to an internal machine.