packet filtered

ahsiao

前几天网络速度很慢，在linux代理服务器上ping www.sohu.com出现这个错误。什么原因？

ssffzz1

解析到了IP了没有啊。

ahsiao

不知道谁还碰到过这种问题。一直找不到原因。

kentchoi

什么错误？为什么看不到？

kentchoi

老外们说是中间防火墙的问题，，，，\r\n\r\n但是你的代理服务器重启了又好了，，，就不明白了。。

kentchoi

有个老外说是 netfilter 升级之后，发生此问题，，，\r\n\r\n或者确实是跟 linux 的 iptables 相关，，，\r\n\r\n但是我现在没环境测试。。

ahsiao

[root@xgfw superman]# ping www.sohu.com\r\nPING pgctccdt01.a.sohu.com (221.236.12.129) 56(84) bytes of data.\r\nFrom 221.236.8.54 icmp_seq=1 Packet filtered\r\nFrom 221.236.8.54 icmp_seq=51 Packet filtered\r\nFrom 221.236.8.54 icmp_seq=52 Packet filtered\r\nFrom 221.236.8.54 icmp_seq=65 Packet filtered\r\nFrom 221.236.8.54 icmp_seq=68 Packet filtered\r\nFrom 221.236.8.54 icmp_seq=82 Packet filtered

kentchoi

C:\\>ping www.sohu.com\r\n\r\nPinging pgcnczjt07.a.sohu.com [61.135.179.166] with 32 bytes of data:\r\n\r\nReply from 61.135.179.166: bytes=32 time=30ms TTL=48\r\nReply from 61.135.179.166: bytes=32 time=28ms TTL=48\r\nReply from 61.135.179.166: bytes=32 time=28ms TTL=48\r\nReply from 61.135.179.166: bytes=32 time=28ms TTL=48\r\n\r\nPing statistics for 61.135.179.166:\r\n    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),\r\nApproximate round trip times in milli-seconds:\r\n    Minimum = 28ms, Maximum = 30ms, Average = 28ms

kentchoi

C:\\>ping 221.236.8.54 -t\r\n\r\nPinging 221.236.8.54 with 32 bytes of data:\r\n\r\nRequest timed out.\r\nRequest timed out.\r\nReply from 221.236.8.54: Destination net unreachable.\r\nRequest timed out.\r\n\r\nPing statistics for 221.236.8.54:\r\n    Packets: Sent = 4, Received = 1, Lost = 3 (75% loss),\r\nApproximate round trip times in milli-seconds:\r\n    Minimum = 0ms, Maximum = 0ms, Average = 0ms\r\n\r\n这个地址特别有意思，，，4个包会回应一个 unreacheable 的数据包，，另外全部是timeout。。。\r\n\r\n很是好玩，，，