Add a -b option that takes a hostname or IP-address as an argument.

This address is bound to the local socket of the TCP connection and is
useful for talking to services which does authentication based on IP-
addresses.

1 files changed, 13 insertions, 1 deletions

diff --git a/usr.bin/telnet/telnet.1 b/usr.bin/telnet/telnet.1
index 446f994c14c..f2b1c4aef81 100644
--- a/usr.bin/telnet/telnet.1
+++ b/usr.bin/telnet/telnet.1
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: telnet.1,v 1.2 1996/03/27 19:33:08 niklas Exp $
+.\"	$OpenBSD: telnet.1,v 1.3 1996/07/03 14:01:56 niklas Exp $
 .\"	$NetBSD: telnet.1,v 1.5 1996/02/28 21:04:12 thorpej Exp $
 .\"
 .\" Copyright (c) 1983, 1990, 1993
@@ -52,6 +52,7 @@ protocol
 .Op Fl S Ar tos
 .Op Fl X Ar authtype
 .Op Fl a
+.Op Fl b Ar hostalias
 .Op Fl c
 .Op Fl d
 .Op Fl e Ar escapechar
@@ -127,6 +128,17 @@ The name used is that of the current user as returned by
 .Xr getlogin 2
 if it agrees with the current user ID,
 otherwise it is the name associated with the user ID.
+.It Fl b Ar hostalias
+Uses
+.Xr bind 2
+on the local socket to bind it to an aliased address (See
+.Xr ifconfig 8
+and the \*(Lqalias\*(Rq specifier) or to the address of
+another interface than the one naturally chosen by
+.Xr connect 2 .
+This can be useful when connecting to services which uses IP addresses
+for authentication and reconfiguration of the server is undesirable (or
+impossible).
 .It Fl c
 Disables the reading of the user's
 .Pa \&.telnetrc