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--- nc.1.orig Fri Oct 19 07:42:18 2001
+++ nc.1 Fri Oct 19 07:52:16 2001
@@ -33,7 +33,8 @@
.Nd "arbitrary TCP and UDP connections and listens"
.Sh SYNOPSIS
.Nm nc
-.Op Fl 46hklnrtuvz
+.Op Fl 46Ehklnrtuvz
+.Op Fl e Ar IPsec policy
.Op Fl i Ar interval
.Op Fl p Ar source port
.Op Fl s Ar source ip address
@@ -90,6 +91,12 @@
Prints out
.Nm
help.
+.It Fl E
+Shortcut for "-e 'in ipsec esp/transport//require' -e 'out ipsec esp/transport//require'", which enables IPsec ESP transport mode in both directions.
+.It Fl e
+If IPsec support is available, then one can specify the IPsec policies to be used using the syntax described in
+.Xr ipsec_set_policy 3 .
+This flag can be specified up to two times, as typically one policy for each direction is needed.
.It Fl i Ar interval
Specifies a delay time interval between lines of text sent and received.
Also causes a delay time between connections to multiple ports.
@@ -149,6 +156,10 @@
.It Li "nc -s 10.1.2.3 example.host 42"
Open a TCP connection to port 42 of example.host using 10.1.2.3 as the
IP for the local end of the connection.
+.It Li "nc -E example.host 42"
+Open a TCP connection to port 42 of example.host using IPsec ESP for incoming and outgoing traffic.
+.It Li "nc -e 'out ipsec esp/transport//require' example.host 42"
+Open a TCP connection to port 42 of example.host using IPsec ESP for outgoing traffic only.
.It Li "nc -v hostname 42"
Open a TCP connection to port 42 of hostname, displaying some
diagnostic messages on stderr.
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