Able to connect but can't surf, ping or host.

[pueyguan]

Hey, I've been having this problem for quite some time. I'm able to connect, but i can't surf, ping or host. I figured a way to solve this but I don't think it's right. please help.

Here are the output and the thigns i do:-

Not working (can't surf, ping or host)
----------------------------------------------------------------------------

[root@localhost root]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:40:05:0D:33:EA
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:128 errors:0 dropped:0 overruns:0 frame:0
TX packets:128 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:8864 (8.6 Kb) TX bytes:9905 (9.6 Kb)
Interrupt:11 Base address:0x9000

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:1712 errors:0 dropped:0 overruns:0 frame:0
TX packets:1712 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1262924 (1.2 Mb) TX bytes:1262924 (1.2 Mb)

ppp0 Link encap:Point-to-Point Protocol
inet addr:219.95.243.26 P-t-P:219.93.218.177 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:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:146 (146.0 b) TX bytes:54 (54.0 b)

[root@localhost root]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
219.93.218.177 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 192.168.1.1 0.0.0.0 UG 0 0 0 eth0
[root@localhost root]#

Things I did :-
----------------------------------------------------------------------------
[root@localhost root]# ifconfig eth0 netmask 255.255.255.255
[root@localhost root]# ifconfig eth0 netmask 255.255.255.0

Activat the ppp0 in network


Working output (able to surf, ping and host)
----------------------------------------------------------------------------
[root@localhost root]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:40:05:0D:33:EA
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1998 errors:0 dropped:0 overruns:0 frame:0
TX packets:2007 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1314041 (1.2 Mb) TX bytes:275124 (268.6 Kb)
Interrupt:11 Base address:0x9000

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:1752 errors:0 dropped:0 overruns:0 frame:0
TX packets:1752 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1265512 (1.2 Mb) TX bytes:1265512 (1.2 Mb)

ppp0 Link encap:Point-to-Point Protocol
inet addr:219.94.81.158 P-t-P:219.93.218.177 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1492 Metric:1
RX packets:401 errors:0 dropped:0 overruns:0 frame:0
TX packets:410 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:254538 (248.5 Kb) TX bytes:48236 (47.1 Kb)

[root@localhost root]# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
219.93.218.177 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 219.93.218.177 0.0.0.0 UG 0 0 0 ppp0


------------------------- end --------------------------------

Thanx in advance.

[odysseus]

if you are connected, but cant ping adresses, its beacause of dns resolution.

in /etc/resolv.conf there should ips of dns servers listed, otherwise dns is not available...

[pueyguan]

Originally Posted by odysseus

if you are connected, but cant ping adresses, its beacause of dns resolution.

in /etc/resolv.conf there should ips of dns servers listed, otherwise dns is not available...

hmmm... there are settings in my resolv.conf, I'll just copy and paste it...

; generated by /sbin/dhclient-script
search localdomain
nameserver 202.188.0.133
nameserver 202.188.1.5

It seems like the dns server, the ip above for my isp is right. bno idea bout the rest though.

[pueyguan]

I read somewhere regarding dhcp and dhcpcd. basically, what does dhcp and dhcpcd do?

I tried to see if I have dhcp and dhcpcd installed using "rpm -qa|grep dhcp" and "rpm -qa|grep dhcpcd". I have only a result for ""rpm -qa|grep dhcp" which is "dhcp-3.0pl2-6.16"

must I install dhcpcd? can this be the problem? thanx again in advance.

[pueyguan]

finally.. able to find an alternative solution to it though it's not really fixing it.

Well, I kinda decided to use "rp-pppoe". Somehow I think the,
"169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 " from the "route -n" result(see post 1) is the one that disable me from receiving any packets from remote sites.

I did a "route -n" using rp-pppoe, the output:-
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
219.93.218.177 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 lo
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 219.93.218.177 0.0.0.0 UG 0 0 0 ppp0

notice that the 169.254.0.0 still there but for device lo. I guess if this settings for the route -n problem before is for lo and not eth0, i guess I would not face this problem.

Well, if anyoen who have problem surfing, ping, etc but connected using xDSL, I guess I owuld recommend one solution is rp-pppoe. Do read the documentation on "how-to-connect.txt". Make sure the eth0 is disable at boot time too.

If anyone do have a solution on how to solve the problem before, please do contribute. Thanx in advance.