--- nc.1.orig	Tue Feb 19 23:45:18 2002
+++ nc.1	Wed Jul 30 11:41:47 2003
@@ -33,7 +33,8 @@
 .Nd "arbitrary TCP and UDP connections and listens"
 .Sh SYNOPSIS
 .Nm nc
-.Op Fl 46hklnrtuvzU
+.Op Fl 46EhklnortuvzU
+.Op Fl e Ar IPsec policy
 .Op Fl i Ar interval
 .Op Fl p Ar source port
 .Op Fl s Ar source ip address
@@ -89,6 +90,12 @@
 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.
@@ -105,6 +112,15 @@
 .It Fl n
 Do not do any DNS or service lookups on any specified addresses,
 hostnames or ports.
+.It Fl o
+.Dq Once-only mode .
+By default,
+.Nm
+does not terminate on EOF condition on input,
+but continues until the network side has been closed down.
+Specifying
+.Fl o
+will make it terminate on EOF as well.
 .It Fl p Ar port
 Specifies the source port
 .Nm
@@ -157,6 +173,10 @@
 .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.