Hello list,
I have two ISP connections (different providers), both with dynamic IP
addresses.
I have three interfaces, two external and one internal and am trying to balance
traffic over the two ppp connections.
Shorewall Version: Shorewall-3.2.4
The Problem:
Using a browser on the firewall (braveheart), traffic is balanced over both
links, but clients (geronimo) behind the server are unable to connect to
external hosts, e.g. to connect to an external POP3 server.
I have gone through the Shorewall MultiISP document a number of times, but am
unable to make things work correctly.
Please see configs/logs below for more detail - is there a glaring omission or
misconception on my part?
Many thanks for any assistance.
Gero.
..............................................................................................................................................
/etc/shorewall/interfaces
#ZONE INTERFACE BROADCAST OPTIONS
net ppp0 detect dhcp,routefilter,norfc1918,tcpflags
net ppp1 detect dhcp,routefilter,norfc1918,tcpflags
loc eth2 detect tcpflags
mob tun0 detect tcpflags
.............................................................................................................................................
/etc/shorewall/masq
INTERFACE SUBNET ADDRESS PROTO PORT(S)
#eth0 eth2
#eth1 eth2
ppp0 $PPP1 $PPP0
ppp1 $PPP0 $PPP1
ppp0 eth2 $PPP0
ppp1 eth2 $PPP1
.............................................................................................................................................
/etc/shorewall/providers
NAME NUMBER MARK DUPLICATE INTERFACE GATEWAY OPTIONS
COPY
ADSL 1 1 - ppp0 detect
track,balance eth2
IBURST 2 2 - ppp1 detect
track,balance eth2
.............................................................................................................................................
braveheart shorewall # ip route ls
10.8.0.2 dev tun0 proto kernel scope link src 10.8.0.1
196.2.112.1 dev ppp1 proto kernel scope link src 196.2.113.182
41.242.64.1 dev ppp0 proto kernel scope link src 41.242.68.98
10.8.0.0/24 via 10.8.0.2 dev tun0
10.100.10.0/24 dev eth2 proto kernel scope link src 10.100.10.1
127.0.0.0/8 dev lo scope link
default
nexthop via 41.242.64.1 dev ppp0 weight 1
nexthop via 196.2.112.1 dev ppp1 weight 1
.............................................................................................................................................
braveheart shorewall # ip rule ls
0: from all lookup local
10001: from all fwmark 0x1 lookup ADSL
10002: from all fwmark 0x2 lookup IBURST
20000: from 165.145.127.86 lookup ADSL
20000: from 165.145.124.131 lookup ADSL
20000: from 41.242.68.98 lookup ADSL
20256: from 196.2.104.214 lookup IBURST
20256: from 41.208.195.204 lookup IBURST
20256: from 196.2.126.97 lookup IBURST
20256: from 196.2.113.182 lookup IBURST
32766: from all lookup main
32767: from all lookup default
.............................................................................................................................................
braveheart shorewall # netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.8.0.2 0.0.0.0 255.255.255.255 UH 0 0 0 tun0
196.2.112.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp1
41.242.64.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
10.8.0.0 10.8.0.2 255.255.255.0 UG 0 0 0 tun0
10.100.10.0 0.0.0.0 255.255.255.0 U 0 0 0 eth2
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 41.242.64.1 0.0.0.0 UG 0 0 0 ppp0
.............................................................................................................................................
Pinging from a client behind the firewall results in the below - packets are
rejected for some reason.
geronimo # ping 196.4.160.2
PING 196.4.160.2 (196.4.160.2) 56(84) bytes of data.
/var/log/messages:
Nov 19 08:18:52 braveheart kernel: Shorewall:FORWARD:REJECT:IN=ppp1 OUT=ppp1
SRC=196.4.160.2 DST=10.100.10.50 LEN=84 TOS=0x00 PREC=0x00 TTL=55 ID=38403 DF
PROTO=ICMP TYPE=0 CODE=0 ID=47879 SEQ=8
.............................................................................................................................................
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