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Re: [debian-knoppix] Can connect to ISP but can't connect to Internet (Former re: Modem problem)



Hi christian,

Thanks for your advice.

On Sat, 2003-08-02 at 00:06, Christian Perle wrote:

> On Fri, Aug 01, 2003 at 19:15:00 +0800, Stephen Liu wrote:
> 
> > root@ttyp2[root]# ping 202.123.68.1
> > PING 202.123.68.1 (202.123.68.1): 56 data bytes
> > 64 bytes from 202.123.68.1: icmp_seq=0 ttl=64 time=0.2 ms
> 
> You pinging your _local_ IP address of the ppp0 interface. For this, no
> packets must be sent over the dsl connection. For a real test, ping the
> IP address of the peer (202.123.71.254 in the example above).
> 
> 
> If you want to know over which interface/gateway an IP packet will be
> sent, try
> $ ip route get <ip-address>
> 
> For the example above, you should get:
> 
> $ ip route get 202.123.68.1
> local 202.123.68.1 dev lo  src 202.123.68.1
>     cache <local>  mtu 16436 advmss 16396
> 
> Packets to 202.123.68.1 will be sent over the local loopback (lo)
> interface, because 202.123.68.1 is a local IP address.

root@ttyp0[root]# ifconfig ppp0
ppp0      Link encap:Point-to-Point Protocol
          inet addr:202.123.68.72  P-t-P:202.123.71.254 
Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1492  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:5 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:64 (64.0 b)  TX bytes:97 (97.0 b)

root@ttyp0[root]# ip route get 202.123.68.72
local 202.123.68.72 dev lo  src 202.123.68.72
    cache <local>  mtu 16436 advmss 16396

root@ttyp0[root]# cat /etc/resolv.conf
nameserver 202.123.77.209
nameserver 202.123.77.213


I did follows as per Achim's advice

root@ttyp4[root]# cat /proc/sys/net/ipv4/ip_forward
0
root@ttyp4[root]# echo 1 >/proc/sys/net/ipv4/ip_forward

root@ttyp4[root]# cat /proc/sys/net/ipv4/ip_forward
1

root@ttyp4[root]# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination


But I still could not connect Internet.

B.Regards
Stephen

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