2c7b227278
default. Despite their name it doesn't keep TCP sessions alive, it kills them if the other end has gone AWOL. This happens a lot with clients which use NAT, dynamic IP assignment or which has a 2^32 * 10^-3 seconds upper bound on their uptime. There is no detectable increase in network trafic because of this: two minimal TCP packets every two hours for a live TCP connection. Many servers already enable keepalives themselves. The host requirements RFC is 10 years old, and doesn't know about the loosing clients of todays InterNet.
342 lines
9.9 KiB
Bash
342 lines
9.9 KiB
Bash
#!/bin/sh -
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#
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# $Id: rc.network,v 1.44 1999/04/12 15:26:41 brian Exp $
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# From: @(#)netstart 5.9 (Berkeley) 3/30/91
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# Note that almost all the user-configurable behavior is no longer in
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# this file, but rather in /etc/rc.conf. Please check that file
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# first before contemplating any changes here. If you do need to change
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# this file for some reason, we would like to know about it.
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# First pass startup stuff.
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network_pass1() {
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echo -n 'Doing initial network setup:'
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# Set the host name if it is not already set
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if [ -z "`hostname -s`" ] ; then
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hostname $hostname
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echo -n ' hostname'
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fi
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# Set the domainname if we're using NIS
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if [ -n "$nisdomainname" -a "x$nisdomainname" != "xNO" ] ; then
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domainname $nisdomainname
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echo -n ' domain'
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fi
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echo '.'
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# Initial ATM interface configuration
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if [ "X${atm_enable}" = X"YES" -a -f /etc/rc.atm ]; then
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. /etc/rc.atm
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atm_pass1
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fi
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# ISDN subsystem startup
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if [ "X${isdn_enable}" = X"YES" -a -f /etc/rc.isdn ]; then
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. /etc/rc.isdn
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fi
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# Special options for sppp(4) interfaces go here. These need
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# to go _before_ the general ifconfig section, since in the case
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# of hardwired (no link1 flag) but required authentication, you
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# cannot pass auth parameters down to the already running interface.
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for ifn in ${sppp_interfaces}; do
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eval spppcontrol_args=\$spppconfig_${ifn}
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if [ -n "${spppcontrol_args}" ] ; then
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# The auth secrets might contain spaces; in order
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# to retain the quotation, we need to eval them
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# here.
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eval spppcontrol ${ifn} ${spppcontrol_args}
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fi
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done
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# Set up all the network interfaces, calling startup scripts if needed
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for ifn in ${network_interfaces}; do
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if [ -e /etc/start_if.${ifn} ]; then
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. /etc/start_if.${ifn}
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fi
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# Do the primary ifconfig if specified
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eval ifconfig_args=\$ifconfig_${ifn}
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if [ -n "${ifconfig_args}" ] ; then
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ifconfig ${ifn} ${ifconfig_args}
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fi
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# Check to see if aliases need to be added
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alias=0
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while :
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do
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eval ifconfig_args=\$ifconfig_${ifn}_alias${alias}
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if [ -n "${ifconfig_args}" ]; then
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ifconfig ${ifn} ${ifconfig_args} alias
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alias=`expr ${alias} + 1`
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else
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break;
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fi
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done
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# Do ipx address if specified
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eval ifconfig_args=\$ifconfig_${ifn}_ipx
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if [ -n "${ifconfig_args}" ]; then
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ifconfig ${ifn} ${ifconfig_args}
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fi
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ifconfig ${ifn}
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done
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# Initialize IP filtering using ipfw
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echo ""
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/sbin/ipfw -q flush > /dev/null 2>&1
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if [ $? = 0 ] ; then
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firewall_in_kernel=1
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else
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firewall_in_kernel=0
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fi
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if [ $firewall_in_kernel = 0 -a "x$firewall_enable" = "xYES" ] ; then
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if kldload ipfw; then
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firewall_in_kernel=1 # module loaded successfully
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echo "Kernel firewall module loaded."
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else
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echo "Warning: firewall kernel module failed to load."
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fi
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fi
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# Load the filters if required
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if [ $firewall_in_kernel = 1 ]; then
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if [ -z "${firewall_script}" ] ; then
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firewall_script="/etc/rc.firewall"
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fi
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if [ -f ${firewall_script} -a X"$firewall_enable" = X"YES" ]; then
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. ${firewall_script}
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echo -n 'Firewall rules loaded, starting divert daemons:'
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# Network Address Translation daemon
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if [ X"${natd_enable}" = X"YES" -a -n "${natd_interface}" ]; then
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if echo ${natd_interface} | \
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grep -q -E '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$'; then
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natd_ifarg="-a ${natd_interface}"
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else
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natd_ifarg="-n ${natd_interface}"
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fi
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echo -n ' natd'; ${natd_program} ${natd_flags} ${natd_ifarg}
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fi
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echo '.'
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else
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IPFW_DEFAULT=`ipfw l 65535`
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if [ "$IPFW_DEFAULT" = "65535 deny ip from any to any" ]; then
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echo -n "Warning: kernel has firewall functionality, "
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echo "but firewall rules are not enabled."
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echo " All ip services are disabled."
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fi
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fi
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fi
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# Additional ATM interface configuration
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if [ -n "${atm_pass1_done}" ]; then
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atm_pass2
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fi
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# Configure routing
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if [ "x$defaultrouter" != "xNO" ] ; then
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static_routes="default ${static_routes}"
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route_default="default ${defaultrouter}"
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fi
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# Set up any static routes. This should be done before router discovery.
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if [ "x${static_routes}" != "x" ]; then
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for i in ${static_routes}; do
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eval route_args=\$route_${i}
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route add ${route_args}
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done
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fi
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echo -n 'Additional routing options:'
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if [ -n "$tcp_extensions" -a "x$tcp_extensions" != "xYES" ] ; then
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echo -n ' tcp extensions=NO'
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sysctl -w net.inet.tcp.rfc1323=0 >/dev/null 2>&1
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fi
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if [ -n "$log_in_vain" -a "x$log_in_vain" != "xNO" ] ; then
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echo -n ' log_in_vain=YES'
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sysctl -w net.inet.tcp.log_in_vain=1 >/dev/null 2>&1
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sysctl -w net.inet.udp.log_in_vain=1 >/dev/null 2>&1
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fi
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if [ X"$icmp_bmcastecho" = X"YES" ]; then
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echo -n ' broadcast ping responses=YES'
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sysctl -w net.inet.icmp.bmcastecho=1 >/dev/null 2>&1
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fi
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if [ "X$gateway_enable" = X"YES" ]; then
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echo -n ' IP gateway=YES'
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sysctl -w net.inet.ip.forwarding=1 >/dev/null 2>&1
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fi
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if [ "X$forward_sourceroute" = X"YES" ]; then
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echo -n ' do source routing=YES'
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sysctl -w net.inet.ip.sourceroute=1 >/dev/null 2>&1
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fi
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if [ "X$accept_sourceroute" = X"YES" ]; then
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echo -n ' accept source routing=YES'
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sysctl -w net.inet.ip.accept_sourceroute=1 >/dev/null 2>&1
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fi
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if [ "X$tcp_keepalive" = X"YES" ]; then
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echo -n ' TCP keepalive=YES'
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sysctl -w net.inet.tcp.always_keepalive=1 >/dev/null 2>&1
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fi
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if [ "X$ipxgateway_enable" = X"YES" ]; then
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echo -n ' IPX gateway=YES'
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sysctl -w net.ipx.ipx.ipxforwarding=1 >/dev/null 2>&1
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fi
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if [ "X$arpproxy_all" = X"YES" ]; then
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echo -n ' enabling ARP_PROXY_ALL: '
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sysctl -w net.link.ether.inet.proxyall=1 2>&1
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fi
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echo '.'
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echo -n 'routing daemons:'
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if [ "X$router_enable" = X"YES" ]; then
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echo -n " ${router}"; ${router} ${router_flags}
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fi
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if [ "X$ipxrouted_enable" = X"YES" ]; then
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echo -n ' IPXrouted'
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IPXrouted ${ipxrouted_flags} > /dev/null 2>&1
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fi
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if [ "X${mrouted_enable}" = X"YES" ]; then
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echo -n ' mrouted'; mrouted ${mrouted_flags}
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fi
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if [ "X$rarpd_enable" = X"YES" ]; then
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echo -n ' rarpd'; rarpd ${rarpd_flags}
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fi
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echo '.'
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network_pass1_done=YES # Let future generations know we made it.
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}
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network_pass2() {
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echo -n 'Doing additional network setup:'
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if [ "X${named_enable}" = X"YES" ]; then
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echo -n ' named'; ${named_program-"named"} ${named_flags}
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fi
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if [ "X${ntpdate_enable}" = X"YES" ]; then
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echo -n ' ntpdate'; ${ntpdate_program} ${ntpdate_flags} >/dev/null 2>&1
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fi
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if [ "X${xntpd_enable}" = X"YES" ]; then
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echo -n ' xntpd'; ${xntpd_program} ${xntpd_flags}
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fi
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if [ "X${timed_enable}" = X"YES" ]; then
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echo -n ' timed'; timed ${timed_flags}
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fi
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if [ "X${portmap_enable}" = X"YES" ]; then
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echo -n ' portmap'; ${portmap_program} ${portmap_flags}
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fi
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# Start ypserv if we're an NIS server.
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# Run rpc.ypxfrd and rpc.yppasswdd only on the NIS master server.
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if [ "X${nis_server_enable}" = X"YES" ]; then
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echo -n ' ypserv'; ypserv ${nis_server_flags}
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if [ "X${nis_ypxfrd_enable}" = X"YES" ]; then
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echo -n ' rpc.ypxfrd'; rpc.ypxfrd ${nis_ypxfrd_flags}
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fi
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if [ "X${nis_yppasswdd_enable}" = X"YES" ]; then
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echo -n ' rpc.yppasswdd'; rpc.yppasswdd ${nis_yppasswdd_flags}
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fi
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fi
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# Start ypbind if we're an NIS client
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if [ "X${nis_client_enable}" = X"YES" ]; then
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echo -n ' ypbind'; ypbind ${nis_client_flags}
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if [ "X${nis_ypset_enable}" = X"YES" ]; then
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echo -n ' ypset'; ypset ${nis_ypset_flags}
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fi
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fi
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# Start keyserv if we are running Secure RPC
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if [ "X${keyserv_enable}" = X"YES" ]; then
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echo -n ' keyserv'; keyserv ${keyserv_flags}
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fi
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# Start ypupdated if we are running Secure RPC and we are NIS master
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if [ "X$rpc_ypupdated_enable" = X"YES" ]; then
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echo -n ' rpc.ypupdated'; rpc.ypupdated
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fi
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# Start ATM daemons
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if [ -n "${atm_pass2_done}" ]; then
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atm_pass3
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fi
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echo '.'
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network_pass2_done=YES
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}
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network_pass3() {
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echo -n 'Starting final network daemons:'
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if [ "X${nfs_server_enable}" = X"YES" -a -r /etc/exports ]; then
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echo -n ' mountd'
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if [ "X${weak_mountd_authentication}" = X"YES" ]; then
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mountd_flags="-n"
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fi
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mountd ${mountd_flags}
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if [ "X${nfs_reserved_port_only}" = X"YES" ]; then
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sysctl -w vfs.nfs.nfs_privport=1 >/dev/null 2>&1
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fi
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echo -n ' nfsd'; nfsd ${nfs_server_flags}
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if [ "X$rpc_lockd_enable" = X"YES" ]; then
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echo -n ' rpc.lockd'; rpc.lockd
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fi
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if [ "X$rpc_statd_enable" = X"YES" ]; then
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echo -n ' rpc.statd'; rpc.statd
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fi
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fi
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if [ "X${nfs_client_enable}" = X"YES" ]; then
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echo -n ' nfsiod'; nfsiod ${nfs_client_flags}
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if [ "X${nfs_access_cache}" != X ]; then
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sysctl -w vfs.nfs.access_cache_timeout=${nfs_access_cache} \
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>/dev/null 2>&1
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fi
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fi
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if [ "X${amd_enable}" = X"YES" ]; then
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echo -n ' amd'
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if [ "X${amd_map_program}" != X"NO" ]; then
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amd_flags="${amd_flags} `eval ${amd_map_program}`"
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fi
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amd -p ${amd_flags} > /var/run/amd.pid 2> /dev/null
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fi
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if [ "X${rwhod_enable}" = X"YES" ]; then
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echo -n ' rwhod'; rwhod ${rwhod_flags}
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fi
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# Kerberos runs ONLY on the Kerberos server machine
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if [ "X${kerberos_server_enable}" = X"YES" ]; then
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if [ "X${kerberos_stash}" = "XYES" ]; then
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stash_flag=-n
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else
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stash_flag=
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fi
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echo -n ' kerberos'; \
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kerberos ${stash_flag} >> /var/log/kerberos.log &
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if [ "X${kadmind_server_enable}" = "XYES" ]; then
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echo -n ' kadmind'; \
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(sleep 20; kadmind ${stash_flag} >/dev/null 2>&1 &) &
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fi
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unset stash_flag
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fi
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echo '.'
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network_pass3_done=YES
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}
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