Below is a snippet from my firewall script
isp1_ip="xx.0.5.20"
isp1_gw="xx.0.5.1"
isp1_net="xx.0.5.0/28"
isp1_if="eth2"
isp2_ip="xx.182.19.88"
isp2_gw="xx.182.19.1"
isp2_net="xx.182.19.0/28"
isp2_if="eth3"
lo_ip="127.0.0.1"
lo_if="lo"
lo_net="127.0.0.1/8"
ip rule delete from $isp1_ip
ip rule delete from $isp2_ip
ip route delete table 5 # isp 1
ip route delete table 7 # isp 2
ip route del default via $isp2_gw dev $isp2_if
ip route flush cache
#ip route default nexthop via $isp2_gw nexthop $isp1_gw
#ip route add default nexthop via $isp2_gw dev $isp2_if weight 2\
# nexthop via $isp1_gw dev $isp1_if weight 1
echo "Adding routes ..."
ip route add $isp1_net dev $isp1_if src $isp1_ip table 5
ip route add default via $isp1_gw table 5
#ip route add $lan_net dev $lan_if table 5
#ip route add $isp2_net dev $isp2_if table 5
#ip route add $lo_net dev $lo_if table 5
ip route add $isp1_net dev $isp1_if src $isp1_ip
ip route add $isp2_net dev $isp2_if src $isp2_ip
ip rule add from $isp1_ip table 5
ip rule add from $isp2_ip table 7
ip route add $isp2_net dev $isp2_if src $isp2_ip table 7
ip route add default via $isp2_gw table 7
ip route add $lan_net dev $lan_if table 7
ip route add $isp1_net dev $isp1_if table 7
ip route add $lo_net dev $lo_if table 7
ip route add default scope global nexthop via $isp2_gw dev $isp2_if \
weight 200 nexthop via $isp1_gw dev $isp1_if weight 1
ip route flush cache
echo "Starting firewall ..."
mail/http connections to $isp1_ip fails. Why is this?
I want to be able to connect to both ISP and fail over to ISP1 when ISP2 is down.
Thanks
Gareth Segree
mailto:Gareth.Segree@xxxxxxxxxxxxx
Technical Support Analyst
The Gleaner Company Ltd.
7 North Street
Kingston
Tel: 922-3400
