[SOLVED] Can't ping in terminal but can browse in firefox

[garry_3peace]

Hi all! I have a strange problem here. So I can browse in Firefox, my Pidgin and Amsn are working fine. I also can use apt-get and lynx in terminal. But I can't ping the web or tracert it. I am behind a proxy. But I have set http_proxy and ftp_proxy in terminal.

If I ping it never reply a thing. So it seems like to be stuck or something like that. While if I tracert, it only show my gateway and the rest of hops will print ****. So does anyone know, why it can be like that?

[jayd512]

It might be necessary to use sudo for ping commands. Or try /sbin/ping <url>

[garry_3peace]

Thanks for replying.
But still doesn't solve the problem. Btw I have 2 IPs. One is eth0 which to connect to internet, and the other is in eth0:0 which to connect with my local network. Am not too understand how is this network setting. But everyone in my network also same with me(has 2 IPs). Could that be the reason I can't Ping or tracert outside??

[garry_3peace]

Btw, here is the result if I ping Google

garry@BOB:~$ sudo ping Google
[sudo] password for garry:
PING Google (64.233.189.99) 56(84) bytes of data.

(after pause awhile, I stop the program with ctrl+c)

--- Google ping statistics ---
45 packets transmitted, 0 received, 100&#37; packet loss, time 44069ms

And here is the result of tracert to Google with max hop 30(default)

garry@BOB:~$ sudo tracert Google
traceroute to Google (64.233.189.147), 30 hops max, 40 byte packets
1 27.227.27.254 (27.227.27.254) 0.224 ms 0.224 ms *
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

[rcgreen]

Your gateway is probably blocking the replies from
ping and traceroute. Some network administrators
have weird ideas about security.

[garry_3peace]

I see, so you mean the ISP block the gateway? Seems possible, just now I try to ping at my friend's Fedora 9 (still in one network), the result just same with me.

But is that possible, they block gateway in Linux, but not in Windows? Coz I can ping in Windows(there are replies).

[garry_3peace]

Sorry, I am mistaken. There is no replies too in Windows. So I think my ISP has blocked the gateway.

Thanks Rogreen