I have a firewall script which i use for masq. I have a DSL connection, eth0 is my external connection and eth1 is my internal. I am masq form ppp0 to eth1.

everything works just fine but when i see my route table i see something funy.

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.7.31.1 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
10.10.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
10.10.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 10.7.31.1 0.0.0.0 UG 0 0 0 ppp0


why do i see 10.7.31.1? how did it become my default gateway? I fixed my subnet to 10.10 then from where did this 10.7 come from?

can anyone clear this for me????????

thank you,
manthram

If you could write which device has which IP....

10.7.31.1

Seems to be your gateway to the outside world. The machine at your ISP that is routing all of your traffic. Here's a snippet of one of mine, also pppoe, eathlink, and the route table will look a little funkier as its an older kernel:

user-112urs1.bi * 255.255.255.255 UH 0 0 0 ppp0
localnet * 255.255.255.0 U 0 0 0 eth1
loopback * 255.0.0.0 U 0 0 0 lo
default user-112urs1.bi 0.0.0.0 UG 0 0 0 ppp0

Cheers,

Finegan

and all the while i thought my computer was giving out that ip.
thanks finegan for the input, but I have a question, isnt the 10.0.0.0 network reserved for private networks?

Actually, getting my head out of my ass and looking at routing tables again, I am mistaken, as it seems that 10.7.31.1 is not actually the gateway's IP, which should be visible from ifconfig, but infact that is your IP. This is rather odd but believable as a lot of ISPs are really cheap with their static IPs.

Luck,

Finegan

I dont understand what you are telling me, you say that is my ip, what is giving that ip?

my ifconfig says that it is using this ip as p-t-p

ppp0 Link encap:Point-to-Point Protocol
inet addr:141.158.226.27 P-t-P:10.7.31.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:1355426 errors:0 dropped:0 overruns:0 frame:0
TX packets:995651 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:1406602349 (1341.4 Mb) TX bytes:115974836 (110.6 Mb)


why is this happenening? when I do a traceroute i see that the packes are going out using this ip

Again, ignore that post where I claimed I had my head up my ass. Its out, I'm looking around, and that 144.x.x.x is actually your IP, but oddly enough you have a ptp connection with a machine on a class A private network, which is weird. Yeah, it indeed seems your gateway is on a private network, which means that something up the ladder is NAT'ing for you.

Cheers,

Finegan