Index: etc/defaults/rc.conf
===================================================================
RCS file: /usr/home/ncvs/src/etc/defaults/rc.conf,v
retrieving revision 1.252.2.21
diff -u -r1.252.2.21 rc.conf
--- etc/defaults/rc.conf	6 Jun 2006 15:04:39 -0000	1.252.2.21
+++ etc/defaults/rc.conf	4 Jul 2006 22:20:49 -0000
@@ -566,6 +566,7 @@
 #jail_example_rootdir="/usr/jail/default"	# Jail's root directory
 #jail_example_hostname="default.domain.com"	# Jail's hostname
 #jail_example_ip="192.168.0.10"			# Jail's IP number
+#jail_example_netmask="255.255.255.255"		# Jail's IP netmask
 #jail_example_interface=""			# Interface to create the IP alias on
 #jail_example_exec_start="/bin/sh /etc/rc"		# command to execute in jail for starting
 #jail_example_exec_stop="/bin/sh /etc/rc.shutdown"	# command to execute in jail for stopping
Index: etc/rc.d/jail
===================================================================
RCS file: /usr/home/ncvs/src/etc/rc.d/jail,v
retrieving revision 1.23.2.7
diff -u -r1.23.2.7 jail
--- etc/rc.d/jail	6 Jun 2006 15:04:39 -0000	1.23.2.7
+++ etc/rc.d/jail	4 Jul 2006 22:20:49 -0000
@@ -33,6 +33,8 @@
 	_procdir="${_rootdir}/proc"
 	eval _hostname=\"\$jail_${_j}_hostname\"
 	eval _ip=\"\$jail_${_j}_ip\"
+	eval _netmask=\"\$jail_${_j}_netmask\"
+	[ -z "${_netmask}" ] && _netmask="255.255.255.255"
 	eval _interface=\"\${jail_${_j}_interface:-${jail_interface}}\"
 	eval _exec=\"\$jail_${_j}_exec\"
 	eval _exec_start=\"\${jail_${_j}_exec_start:-${jail_exec_start}}\"
@@ -76,6 +78,7 @@
 	debug "$_j mount enable: $_mount"
 	debug "$_j hostname: $_hostname"
 	debug "$_j ip: $_ip"
+	debug "$_j netmask: $_netmask"
 	debug "$_j interface: $_interface"
 	debug "$_j root: $_rootdir"
 	debug "$_j devdir: $_devdir"
@@ -96,6 +99,9 @@
 	if [ -z "${_ip}" ]; then
 		err 3 "$name: No IP address has been defined for ${_j}"
 	fi
+	if [ -z "${_netmask}" ]; then
+		err 3 "$name: No netmask has been defined for ${_j}"
+	fi
 
 }
 
@@ -176,7 +182,7 @@
 			continue;
 		fi
 		if [ -n "${_interface}" ]; then
-			ifconfig ${_interface} alias ${_ip} netmask 255.255.255.255
+			ifconfig ${_interface} alias ${_ip} netmask ${_netmask}
 		fi
 		if checkyesno _mount; then
 			info "Mounting fstab for jail ${_jail} (${_fstab})"
Index: share/man/man5/rc.conf.5
===================================================================
RCS file: /usr/home/ncvs/src/share/man/man5/rc.conf.5,v
retrieving revision 1.256.2.23
diff -u -r1.256.2.23 rc.conf.5
--- share/man/man5/rc.conf.5	6 Jun 2006 15:04:39 -0000	1.256.2.23
+++ share/man/man5/rc.conf.5	4 Jul 2006 22:20:49 -0000
@@ -3133,6 +3133,13 @@
 Unset by default.
 Set to the IP address assigned to jail
 .Va jname .
+.It Va jail_ Ns Ao Ar jname Ac Ns Va _netmask
+.Pq Vt str
+Set to the netmask assigned to jail
+.Va jname .
+Set to
+.Dq Li 255.255.255.255
+by default.
 .It Va jail_ Ns Ao Ar jname Ac Ns Va _flags
 .Pq Vt str
 Set to