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Problems with lost packets



    Hello,
 
I'm having problems with packets from internet.
 
I have a little network. theare are a firewall who masquerade all paquets. Now I have a server for web, email etc...
 
The firewall have a adsl line. theare are about 10  windows machines which use internet conection by the firewall.
 
All these machines ( the windows ones) use full internet without problems. But the server have a big problem whit packets...
 
 
For instance, if I write ping www.gulic.org from the server, I get the follow:
 
 ping www.gulic.org
PING www.gulic.org (193.145.135.17): 56 data bytes
64 bytes from 193.145.135.17: icmp_seq=0 ttl=237 time=157.7 ms
64 bytes from 193.145.135.17: icmp_seq=1 ttl=237 time=465.3 ms
 
 
and I only can receive one or two response to the ping, after Ctrl+C I get the follow:
 
--- www.gulic.org ping statistics ---
9 packets transmitted, 2 packets received, 77% packet loss
round-trip min/avg/max = 157.7/311.5/465.3 ms
 
The problem is only if I ping to a exterior IP. If I ping to an internal one, the response of ping is normal:
 
 ping 10.0.0.64
PING 10.0.0.64 (10.0.0.64): 56 data bytes
64 bytes from 10.0.0.64: icmp_seq=0 ttl=128 time=0.7 ms
64 bytes from 10.0.0.64: icmp_seq=1 ttl=128 time=0.6 ms
64 bytes from 10.0.0.64: icmp_seq=2 ttl=128 time=0.7 ms
64 bytes from 10.0.0.64: icmp_seq=3 ttl=128 time=0.7 ms
64 bytes from 10.0.0.64: icmp_seq=4 ttl=128 time=0.7 ms
64 bytes from 10.0.0.64: icmp_seq=5 ttl=128 time=0.7 ms
64 bytes from 10.0.0.64: icmp_seq=6 ttl=128 time=0.7 ms
 
--- 10.0.0.64 ping statistics ---
7 packets transmitted, 7 packets received, 0% packet loss
round-trip min/avg/max = 0.6/0.6/0.7 ms
servidor:~#
 
 
 
 
The server have a pci ethernet with the 8029 realtek chip.
 
The server have a  2.4.18 kernel with xfs journaling support.
 
 
Could anyone help me with this problem?
 
Sorry for my bad English and thanks in advance.
 

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