sorry to ask this question again.this is a problem when we use linux2.4 as our firewall. our network is as the graph blow,we have about 500 users.
hostA-->switchA--->Central Switch--->firewall-->router | | | | switchB switchC the problem is that when i ping from hostA to firewal, we lost about 20 percent packets.but when we use linux2.2,everything is OK. when i removed the firewall and placed a normal PC there,the ping is also OK. so i think the problem is on the firewall. or maybe there are some problem between the switch and the firewall? thanks for help. chuanbo zheng _________________________________________________________ Do You Yahoo!? 摊开你的掌心 让我看看你 http://sweepstakes.yahoo.com/2002cnuser