Reviewed by: wollman

Add a knob to make it easy to turn off RFC 1323 and RFC 1644 options.

etc/netstart

@@ -1,6 +1,6 @@
 #!/bin/sh -
 #
-#	$Id: netstart,v 1.28 1995/04/12 16:58:06 ache Exp $
+#	$Id: netstart,v 1.29 1995/04/24 23:52:15 rgrimes Exp $
 #	From: @(#)netstart	5.9 (Berkeley) 3/30/91
 
 # If there is a global system configuration file, suck it in.
@@ -18,6 +18,16 @@ if [ -n "$defaultdomainname" -a "x$defaultdomainname" != "xNO" ] ; then
 	domainname $defaultdomainname
 fi
 
+#
+# XXX This is known to cause an error if /usr is nfs mounted since it
+# will not be avaliable until after the network is up :-(.  Once the
+# relocation of sysctl to /sbin is done that problem will go away.
+#
+if [ -n "$tcp_extensions" -a "x$tcp_extensions" = "xNO" ] ; then
+	sysctl -nw net.inet.tcp.rfc1323=0
+	sysctl -nw net.inet.tcp.rfc1644=0
+fi
+
 # Set up all the network interfaces, calling startup scripts if needed
 for ifn in ${network_interfaces}; do
 	if [ -e /etc/start_if.${ifn} ]; then

etc/sysconfig

@@ -4,7 +4,7 @@
 # This is sysconfig - a file full of useful variables that you can set 
 # to change the default startup behavior of your system.
 #
-#	$Id: sysconfig,v 1.10 1995/04/11 01:22:24 rgrimes Exp $
+#	$Id: sysconfig,v 1.11 1995/04/24 23:52:16 rgrimes Exp $
 
 ######################### Start Of Syscons Section #######################
 
@@ -63,6 +63,14 @@ hostname=myname.my.domain
 # Set to the NIS domainname of your host, or NO if none
 defaultdomainname=NO
 
+#
+# Some broken implementations can't handle the RFC 1323 and RFC 1644
+# TCP options.  If TCP connections randomly hang, try disabling this,
+# and bug the vendor of the losing equipment.
+#
+tcp_extensions=YES
+
+# XXX This is known to cause an error if /usr is nfs mounted since it
 # Set to the list of network devices on this host.  You must have an
 # ifconfig_${network_interface} line for each interface listed here.
 # for example: