Dual-WAN for simple round-robin load equalization
From DD-WRT Wiki
Revision as of 16:36, 11 May 2006 (edit) 169.237.154.68 (Talk) ← Previous diff |
Revision as of 16:53, 11 May 2006 (edit) (undo) 169.237.154.68 (Talk) Next diff → |
||
Line 1: | Line 1: | ||
+ | (copied from forum-posting by user aldoir [http://forum.bsr-clan.de/ftopic8012.html Dual-WAN forum posting] | ||
- | + | You'll need to create a new vlan, called vlan2. | |
- | + | Enter in the web interface, Settings / VLANs. Set the PORT4 to a new VLAN. | |
- | Enter in the web interface, Settings / VLANs. Set the PORT4 to a new VLAN | + | |
- | + | Enter in the console, and do the following commands | |
- | + | '''commands to set VLANs''' | |
+ | <pre> | ||
nvram set vlan0ports="1 2 3 5*" | nvram set vlan0ports="1 2 3 5*" | ||
nvram set vlan2ports="4 5" | nvram set vlan2ports="4 5" | ||
nvram set vlan2hwname=et0 | nvram set vlan2hwname=et0 | ||
nvram commit | nvram commit | ||
- | + | </pre> | |
here, the scripts I used to startup the interface. You need to call then in rc_firewall | here, the scripts I used to startup the interface. You need to call then in rc_firewall | ||
- | wan2.firewall | + | '''wan2.firewall''' |
- | + | <pre> | |
#!/bin/sh | #!/bin/sh | ||
- | |||
WAN2_IFNAME=vlan2 | WAN2_IFNAME=vlan2 | ||
WAN2_IPADDR=10.0.0.2 | WAN2_IPADDR=10.0.0.2 | ||
WAN2_GATEWAY=10.0.0.1 | WAN2_GATEWAY=10.0.0.1 | ||
WAN2_NETMASK=255.0.0.0 | WAN2_NETMASK=255.0.0.0 | ||
- | |||
if [ "$(nvram get wan2_ipaddr)" != "$WAN2_IPADDR" ]; then | if [ "$(nvram get wan2_ipaddr)" != "$WAN2_IPADDR" ]; then | ||
nvram set wan2_ifname=$WAN2_IFNAME | nvram set wan2_ifname=$WAN2_IFNAME | ||
Line 32: | Line 31: | ||
nvram commit | nvram commit | ||
fi | fi | ||
- | |||
ifconfig $(nvram get wan2_ifname) up $(nvram get wan2_ipaddr) netmask $(nvram get wan2_netmask) | ifconfig $(nvram get wan2_ifname) up $(nvram get wan2_ipaddr) netmask $(nvram get wan2_netmask) | ||
+ | </pre> | ||
- | + | '''routes.firewall''' | |
- | routes.firewall | + | <pre> |
- | + | ||
#!/bin/sh | #!/bin/sh | ||
- | |||
ip rule flush | ip rule flush | ||
- | |||
ip rule add lookup main prio 32766 | ip rule add lookup main prio 32766 | ||
ip rule add lookup default prio 32767 | ip rule add lookup default prio 32767 | ||
- | |||
ip rule add from $(nvram get wan_ipaddr) table 100 prio 100 | ip rule add from $(nvram get wan_ipaddr) table 100 prio 100 | ||
ip rule add fwmark 0x100 table 100 prio 101 | ip rule add fwmark 0x100 table 100 prio 101 | ||
- | |||
ip rule add from $(nvram get wan2_ipaddr) table 200 prio 200 | ip rule add from $(nvram get wan2_ipaddr) table 200 prio 200 | ||
ip rule add fwmark 0x200 table 200 prio 201 | ip rule add fwmark 0x200 table 200 prio 201 | ||
- | |||
ip route flush table 100 | ip route flush table 100 | ||
ip route flush table 200 | ip route flush table 200 | ||
- | |||
for TABLE in 100 200 | for TABLE in 100 200 | ||
do | do | ||
Line 61: | Line 53: | ||
done | done | ||
done | done | ||
- | |||
ip route add table 100 default via $(nvram get wan_gateway) | ip route add table 100 default via $(nvram get wan_gateway) | ||
ip route add table 200 default via $(nvram get wan2_gateway) | ip route add table 200 default via $(nvram get wan2_gateway) | ||
+ | </pre> | ||
- | + | '''firewall.firewall''' | |
- | firewall.firewall | + | <pre> |
- | + | ||
#!/bin/sh | #!/bin/sh | ||
- | |||
#DD-WRT firewall rules | #DD-WRT firewall rules | ||
#BEGIN | #BEGIN | ||
- | |||
- | |||
#apply simple forward rules | #apply simple forward rules | ||
for RULE in $(nvram get forward_spec) | for RULE in $(nvram get forward_spec) | ||
Line 98: | Line 86: | ||
fi | fi | ||
done | done | ||
- | |||
#apply range forward rules | #apply range forward rules | ||
for RULE in $(nvram get forward_port) | for RULE in $(nvram get forward_port) | ||
Line 123: | Line 110: | ||
fi | fi | ||
done | done | ||
- | |||
- | |||
iptables -A PREROUTING -t nat -p icmp -d $(nvram get wan2_ipaddr) -j DNAT --to $(nvram get lan_ipaddr) | iptables -A PREROUTING -t nat -p icmp -d $(nvram get wan2_ipaddr) -j DNAT --to $(nvram get lan_ipaddr) | ||
- | |||
if [ $(nvram get remote_management) -eq 1 ]; then | if [ $(nvram get remote_management) -eq 1 ]; then | ||
iptables -A PREROUTING -t nat -p tcp -d $(nvram get wan2_ipaddr) \ | iptables -A PREROUTING -t nat -p tcp -d $(nvram get wan2_ipaddr) \ | ||
--dport $(nvram get http_wanport) -j DNAT --to $(nvram get lan_ipaddr):$(nvram get http_lanport) | --dport $(nvram get http_wanport) -j DNAT --to $(nvram get lan_ipaddr):$(nvram get http_lanport) | ||
fi | fi | ||
- | |||
if [ $(nvram get dmz_enable) -eq 1 ]; then | if [ $(nvram get dmz_enable) -eq 1 ]; then | ||
DMZ_IP=$(nvram get lan_ipaddr | sed -r 's/[0-9]+$//')$(nvram get dmz_ipaddr) | DMZ_IP=$(nvram get lan_ipaddr | sed -r 's/[0-9]+$//')$(nvram get dmz_ipaddr) | ||
iptables -A PREROUTING -t nat -d $(nvram get wan2_ipaddr) -j DNAT --to $DMZ_IP | iptables -A PREROUTING -t nat -d $(nvram get wan2_ipaddr) -j DNAT --to $DMZ_IP | ||
fi | fi | ||
- | |||
iptables -A PREROUTING -t nat --dest $(nvram get wan2_ipaddr) -j TRIGGER --trigger-type dnat | iptables -A PREROUTING -t nat --dest $(nvram get wan2_ipaddr) -j TRIGGER --trigger-type dnat | ||
iptables -A FORWARD -i $(nvram get wan2_ifname) -o $(nvram get lan_ifname) -j TRIGGER --trigger-type in | iptables -A FORWARD -i $(nvram get wan2_ifname) -o $(nvram get lan_ifname) -j TRIGGER --trigger-type in | ||
- | |||
iptables -A PREROUTING -t mangle -i $(nvram get wan2_ifname) -j IMQ --todev 0 | iptables -A PREROUTING -t mangle -i $(nvram get wan2_ifname) -j IMQ --todev 0 | ||
iptables -A PREROUTING -t mangle -i $(nvram get wan2_ifname) -j SVQOS_IN | iptables -A PREROUTING -t mangle -i $(nvram get wan2_ifname) -j SVQOS_IN | ||
iptables -A POSTROUTING -t mangle -o $(nvram get wan2_ifname) -j SVQOS_OUT | iptables -A POSTROUTING -t mangle -o $(nvram get wan2_ifname) -j SVQOS_OUT | ||
- | |||
#DD-WRT END | #DD-WRT END | ||
- | |||
- | |||
#Save the gateway in the connection mark for new incoming connections | #Save the gateway in the connection mark for new incoming connections | ||
iptables -t mangle -A PREROUTING -i $(nvram get wan_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x100 | iptables -t mangle -A PREROUTING -i $(nvram get wan_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x100 | ||
iptables -t mangle -A PREROUTING -i $(nvram get wan2_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x200 | iptables -t mangle -A PREROUTING -i $(nvram get wan2_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x200 | ||
- | |||
# Save the gateway in the connection mark for new outgoing connections | # Save the gateway in the connection mark for new outgoing connections | ||
iptables -t mangle -A POSTROUTING -o $(nvram get wan_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x100 | iptables -t mangle -A POSTROUTING -o $(nvram get wan_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x100 | ||
iptables -t mangle -A POSTROUTING -o $(nvram get wan2_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x200 | iptables -t mangle -A POSTROUTING -o $(nvram get wan2_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x200 | ||
- | |||
# Use the correct gateway for reply packets from the LAN | # Use the correct gateway for reply packets from the LAN | ||
- | iptables -t mangle -A PREROUTING -i $(nvram get lan_ifname) -m conntrack --ctstate ESTABLISHED,RELATED -j CONNMARK --restore-mark | + | iptables -t mangle -A PREROUTING -i $(nvram get lan_ifname) -m conntrack --ctstate ESTABLISHED,RELATED -j CONNMARK --restore-mark |
- | + | ||
# Use the correct gateway for reply packets from local connections | # Use the correct gateway for reply packets from local connections | ||
iptables -t mangle -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j CONNMARK --restore-mark | iptables -t mangle -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j CONNMARK --restore-mark | ||
- | |||
#mask known packets to its source address | #mask known packets to its source address | ||
iptables -A POSTROUTING -t nat -m mark --mark 0x100 -j SNAT --to-source $(nvram get wan_ipaddr) | iptables -A POSTROUTING -t nat -m mark --mark 0x100 -j SNAT --to-source $(nvram get wan_ipaddr) | ||
iptables -A POSTROUTING -t nat -m mark --mark 0x200 -j SNAT --to-source $(nvram get wan2_ipaddr) | iptables -A POSTROUTING -t nat -m mark --mark 0x200 -j SNAT --to-source $(nvram get wan2_ipaddr) | ||
- | |||
#permit access to wan2 | #permit access to wan2 | ||
iptables -A POSTROUTING -t nat -j MASQUERADE -o $(nvram get wan2_ifname) | iptables -A POSTROUTING -t nat -j MASQUERADE -o $(nvram get wan2_ifname) | ||
- | |||
#restore-mark is done in PREROUTING. If restored again, will loose the outgoing marks | #restore-mark is done in PREROUTING. If restored again, will loose the outgoing marks | ||
iptables -t mangle -D SVQOS_OUT -j CONNMARK --restore-mark 2> /dev/null | iptables -t mangle -D SVQOS_OUT -j CONNMARK --restore-mark 2> /dev/null | ||
- | |||
#iptables -t mangle -A PREROUTING -i $(nvram get lan_ifname) -m multiport -p tcp --dport 22,25,80,110,119,143,443,993,3389 -j MARK --set-mark 0x100 | #iptables -t mangle -A PREROUTING -i $(nvram get lan_ifname) -m multiport -p tcp --dport 22,25,80,110,119,143,443,993,3389 -j MARK --set-mark 0x100 | ||
- | |||
#use WAN1 for common navigation, WAN2 for P2P traffic and others | #use WAN1 for common navigation, WAN2 for P2P traffic and others | ||
#iptables -t mangle -I PREROUTING -i $(nvram get lan_ifname) -s 192.168.1.100 -j MARK --set-mark 0x200 | #iptables -t mangle -I PREROUTING -i $(nvram get lan_ifname) -s 192.168.1.100 -j MARK --set-mark 0x200 | ||
- | |||
#iptables -t mangle -I PREROUTING -i $(nvram get lan_ifname) -s 192.168.1.100 -j LOG --log-prefix 'P2P: ' | #iptables -t mangle -I PREROUTING -i $(nvram get lan_ifname) -s 192.168.1.100 -j LOG --log-prefix 'P2P: ' | ||
- | |||
RP_PATH=/proc/sys/net/ipv4/conf | RP_PATH=/proc/sys/net/ipv4/conf | ||
for IFACE in `ls $RP_PATH`; do | for IFACE in `ls $RP_PATH`; do | ||
echo 0 > $RP_PATH/$IFACE/rp_filter | echo 0 > $RP_PATH/$IFACE/rp_filter | ||
done | done | ||
- | + | </pre> | |
Once everything works, you should use the ip route equalize (search in google the sintax) to balance the load, or do a -j MARK --set-mark 0xN00 via iptables to redirect your traffig to WAN1 (0x100) or WAN2 (0x200) | Once everything works, you should use the ip route equalize (search in google the sintax) to balance the load, or do a -j MARK --set-mark 0xN00 via iptables to redirect your traffig to WAN1 (0x100) or WAN2 (0x200) |
Revision as of 16:53, 11 May 2006
(copied from forum-posting by user aldoir Dual-WAN forum posting
You'll need to create a new vlan, called vlan2.
Enter in the web interface, Settings / VLANs. Set the PORT4 to a new VLAN.
Enter in the console, and do the following commands
commands to set VLANs
nvram set vlan0ports="1 2 3 5*" nvram set vlan2ports="4 5" nvram set vlan2hwname=et0 nvram commit
here, the scripts I used to startup the interface. You need to call then in rc_firewall
wan2.firewall
#!/bin/sh WAN2_IFNAME=vlan2 WAN2_IPADDR=10.0.0.2 WAN2_GATEWAY=10.0.0.1 WAN2_NETMASK=255.0.0.0 if [ "$(nvram get wan2_ipaddr)" != "$WAN2_IPADDR" ]; then nvram set wan2_ifname=$WAN2_IFNAME nvram set wan2_ipaddr=$WAN2_IPADDR nvram set wan2_gateway=$WAN2_GATEWAY nvram set wan2_netmask=$WAN2_NETMASK nvram commit fi ifconfig $(nvram get wan2_ifname) up $(nvram get wan2_ipaddr) netmask $(nvram get wan2_netmask)
routes.firewall
#!/bin/sh ip rule flush ip rule add lookup main prio 32766 ip rule add lookup default prio 32767 ip rule add from $(nvram get wan_ipaddr) table 100 prio 100 ip rule add fwmark 0x100 table 100 prio 101 ip rule add from $(nvram get wan2_ipaddr) table 200 prio 200 ip rule add fwmark 0x200 table 200 prio 201 ip route flush table 100 ip route flush table 200 for TABLE in 100 200 do ip route | grep link | while read ROUTE do ip route add table $TABLE to $ROUTE done done ip route add table 100 default via $(nvram get wan_gateway) ip route add table 200 default via $(nvram get wan2_gateway)
firewall.firewall
#!/bin/sh #DD-WRT firewall rules #BEGIN #apply simple forward rules for RULE in $(nvram get forward_spec) do FROM=`echo $RULE | cut -d '>' -f 1` TO=`echo $RULE | cut -d '>' -f 2` STATE=`echo $FROM | cut -d ':' -f 2` PROTO=`echo $FROM | cut -d ':' -f 3` SPORT=`echo $FROM | cut -d ':' -f 4` DEST=`echo $TO | cut -d ':' -f 1` DPORT=`echo $TO | cut -d ':' -f 2` if [ "$STATE" = "on" ]; then if [ "$PROTO" = "both" ]; then #udp #iptables -A FORWARD -d $(nvram get wan2_ipaddr) -p udp --dport $SPORT -j ACCEPT iptables -A PREROUTING -t nat -p udp -d $(nvram get wan2_ipaddr) --dport $SPORT -j DNAT --to $DEST:$DPORT #tcp #iptables -A FORWARD -d $(nvram get wan2_ipaddr) -p tcp --dport $SPORT -j ACCEPT iptables -A PREROUTING -t nat -p tcp -d $(nvram get wan2_ipaddr) --dport $SPORT -j DNAT --to $DEST:$DPORT else #iptables -A FORWARD -d $(nvram get wan2_ipaddr) -p $PROTO --dport $SPORT -j ACCEPT iptables -A PREROUTING -t nat -p $PROTO -d $(nvram get wan2_ipaddr) --dport $SPORT -j DNAT --to $DEST:$DPORT fi fi done #apply range forward rules for RULE in $(nvram get forward_port) do FROM=`echo $RULE | cut -d '>' -f 1` TO=`echo $RULE | cut -d '>' -f 2` STATE=`echo $FROM | cut -d ':' -f 2` PROTO=`echo $FROM | cut -d ':' -f 3` SPORT=`echo $FROM | cut -d ':' -f 4` EPORT=`echo $FROM | cut -d ':' -f 5` if [ "$STATE" = "on" ]; then if [ "$PROTO" = "both" ]; then #udp #iptables -A FORWARD -d $(nvram get wan2_ipaddr) -p udp --dport $SPORT:$EPORT -j ACCEPT iptables -A PREROUTING -t nat -p udp -d $(nvram get wan2_ipaddr) --dport $SPORT:$EPORT -j DNAT --to $TO #tcp #iptables -A FORWARD -d $(nvram get wan2_ipaddr) -p tcp --dport $SPORT:$EPORT -j ACCEPT iptables -A PREROUTING -t nat -p tcp -d $(nvram get wan2_ipaddr) --dport $SPORT:$EPORT -j DNAT --to $TO else #iptables -A FORWARD -d $(nvram get wan2_ipaddr) -p $PROTO --dport $SPORT:$EPORT -j ACCEPT iptables -A PREROUTING -t nat -p $PROTO -d $(nvram get wan2_ipaddr) --dport $SPORT:$EPORT -j DNAT --to $TO fi fi done iptables -A PREROUTING -t nat -p icmp -d $(nvram get wan2_ipaddr) -j DNAT --to $(nvram get lan_ipaddr) if [ $(nvram get remote_management) -eq 1 ]; then iptables -A PREROUTING -t nat -p tcp -d $(nvram get wan2_ipaddr) \ --dport $(nvram get http_wanport) -j DNAT --to $(nvram get lan_ipaddr):$(nvram get http_lanport) fi if [ $(nvram get dmz_enable) -eq 1 ]; then DMZ_IP=$(nvram get lan_ipaddr | sed -r 's/[0-9]+$//')$(nvram get dmz_ipaddr) iptables -A PREROUTING -t nat -d $(nvram get wan2_ipaddr) -j DNAT --to $DMZ_IP fi iptables -A PREROUTING -t nat --dest $(nvram get wan2_ipaddr) -j TRIGGER --trigger-type dnat iptables -A FORWARD -i $(nvram get wan2_ifname) -o $(nvram get lan_ifname) -j TRIGGER --trigger-type in iptables -A PREROUTING -t mangle -i $(nvram get wan2_ifname) -j IMQ --todev 0 iptables -A PREROUTING -t mangle -i $(nvram get wan2_ifname) -j SVQOS_IN iptables -A POSTROUTING -t mangle -o $(nvram get wan2_ifname) -j SVQOS_OUT #DD-WRT END #Save the gateway in the connection mark for new incoming connections iptables -t mangle -A PREROUTING -i $(nvram get wan_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x100 iptables -t mangle -A PREROUTING -i $(nvram get wan2_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x200 # Save the gateway in the connection mark for new outgoing connections iptables -t mangle -A POSTROUTING -o $(nvram get wan_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x100 iptables -t mangle -A POSTROUTING -o $(nvram get wan2_ifname) -m conntrack --ctstate NEW -j CONNMARK --set-mark 0x200 # Use the correct gateway for reply packets from the LAN iptables -t mangle -A PREROUTING -i $(nvram get lan_ifname) -m conntrack --ctstate ESTABLISHED,RELATED -j CONNMARK --restore-mark # Use the correct gateway for reply packets from local connections iptables -t mangle -A OUTPUT -m conntrack --ctstate ESTABLISHED,RELATED -j CONNMARK --restore-mark #mask known packets to its source address iptables -A POSTROUTING -t nat -m mark --mark 0x100 -j SNAT --to-source $(nvram get wan_ipaddr) iptables -A POSTROUTING -t nat -m mark --mark 0x200 -j SNAT --to-source $(nvram get wan2_ipaddr) #permit access to wan2 iptables -A POSTROUTING -t nat -j MASQUERADE -o $(nvram get wan2_ifname) #restore-mark is done in PREROUTING. If restored again, will loose the outgoing marks iptables -t mangle -D SVQOS_OUT -j CONNMARK --restore-mark 2> /dev/null #iptables -t mangle -A PREROUTING -i $(nvram get lan_ifname) -m multiport -p tcp --dport 22,25,80,110,119,143,443,993,3389 -j MARK --set-mark 0x100 #use WAN1 for common navigation, WAN2 for P2P traffic and others #iptables -t mangle -I PREROUTING -i $(nvram get lan_ifname) -s 192.168.1.100 -j MARK --set-mark 0x200 #iptables -t mangle -I PREROUTING -i $(nvram get lan_ifname) -s 192.168.1.100 -j LOG --log-prefix 'P2P: ' RP_PATH=/proc/sys/net/ipv4/conf for IFACE in `ls $RP_PATH`; do echo 0 > $RP_PATH/$IFACE/rp_filter done
Once everything works, you should use the ip route equalize (search in google the sintax) to balance the load, or do a -j MARK --set-mark 0xN00 via iptables to redirect your traffig to WAN1 (0x100) or WAN2 (0x200)
If you need further assistence, post back here or PM-me
The firewall scripts does not yet implement the full dd-wrt firewall, only the basic port / range forwarding.
This is script works for both outgoing AND incomingn connections (most scripts only treats outgoing), so you should be able to accept connections in both links simultaneous (WEB in one and FTP in another, for eg)