Hey guys, I've got a linux box here which acts as a simple gateway.
It has an eth0 interface (10.0.0.110) which is the interface through which
the rest of the computers on the lan send their requests.
It has an eth1 which is where I have an airbridge device plugged into which
provides microwave connectivity.
I'm then running rp-pppoe-3.3-1 to do PPPoE over eth1. This works fine and
creates a ppp0 inteface.
I've changed my $EXTIF in my firewall script to point to ppp0 rather than
eth1, but this is preenting problems. While client computers can ping
external addresses (i.e icmp works fine), any tcp requests like web or
telnet are failing.
If I'm on the gateway box, I can telnet to an outside box, however if I bind
the source address to an internal ip (i.e telnet -b 10.0.0.110 <destination
ip>), telnet fails to connect.
Does anyone have any pointers / explanations on how I should go about
modifying the firewall?
The info section...
[root@localhost root]# /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:50:BA:BE:19:B5
inet addr:10.0.0.110 Bcast:10.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:243775 errors:5 dropped:0 overruns:0 frame:0
TX packets:180768 errors:0 dropped:0 overruns:1 carrier:0
collisions:265 txqueuelen:100
RX bytes:39471182 (37.6 Mb) TX bytes:90122080 (85.9 Mb)
Interrupt:10 Base address:0x9000
eth1 Link encap:Ethernet HWaddr 00:10:DC:1F:99:2A
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:243010 errors:0 dropped:0 overruns:0 frame:0
TX packets:226063 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:98271030 (93.7 Mb) TX bytes:37672928 (35.9 Mb)
Interrupt:11 Base address:0xb000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:379 errors:0 dropped:0 overruns:0 frame:0
TX packets:379 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:142373 (139.0 Kb) TX bytes:142373 (139.0 Kb)
ppp0 Link encap:Point-to-Point Protocol
inet addr:203.91.222.22 P-t-P:203.91.222.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1200 Metric:1
RX packets:190668 errors:0 dropped:0 overruns:0 frame:0
TX packets:205174 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:90723225 (86.5 Mb) TX bytes:31905446 (30.4 Mb)
And my firewall script is attached to this email.
Thanks in advance to anyone who reads this and to anyone who can help :)
cheers,
Anth
penrithlakes
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