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<DIV><FONT size=2>My computer's OS is </FONT><FONT size=2>Red Hat Linux7.3,I can
ping this Linux computer from other computers,but in this Linux computer,I ping
publish net,I fount I can't ping it,and I can't visit public net in Red Hat
Linux7.3,for example:</FONT></DIV>
<DIV><FONT size=2>[root@www root]# ping <A
href="http://www.sina.com">www.sina.com</A><BR>ping: unknown host <A
href="http://www.sina.com">www.sina.com</A></FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Then I try ping gateway,I got follow result:</FONT></DIV>
<DIV><FONT size=2>[root@www root]# ping 210.xx.xx.xx<BR>PING 210.xx.xx.xx
(210.xx.xx.xx) from 210.xx.xx.xx : 56(84) bytes of data.<BR>From 210.xx.xx.xx
icmp_seq=1 Packet filtered<BR>From 210.xx.xx.x x icmp_seq=2 Packet
filtered<BR>From 210.xx.xx.xx icmp_seq=3 Packet filtered<BR>From 210.xx.xx.xx
icmp_seq=4 Packet filtered<BR>From 210.xx.xx.xx icmp_seq=5 Packet
filtered</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>--- 210.xx.xx.xx ping statistics ---<BR>5 packets transmitted,
0 received, +5 errors, 100% loss, time 4012ms</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Then I try to ping DNS Server,I found I can't ping
it!</FONT></DIV>
<DIV><FONT size=2>[root@www root]# ping 210.x.x.x<BR>connect: Network is
unreachable</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Then I use Windows OS,I configure IP address,gateway and
DNS as same as Red Hat Linux7.3,I found I can ping public net and visit
public net,like follows:</FONT></DIV>
<DIV><FONT size=2>C:\Documents and Settings\Administrator>ping <A
href="http://www.sina.com">www.sina.com</A></FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Pinging us.sina.com.cn [66.77.9.79] with 32 bytes of
data:</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Reply from 66.77.9.79: bytes=32 time=190ms TTL=237<BR>Reply
from 66.77.9.79: bytes=32 time=181ms TTL=237<BR>Reply from 66.77.9.79: bytes=32
time=190ms TTL=237<BR>Reply from 66.77.9.79: bytes=32 time=181ms
TTL=237</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Ping statistics for 66.77.9.79:<BR> Packets:
Sent = 4, Received = 4, Lost = 0 (0% loss),<BR>Approximate round trip times in
milli-seconds:<BR> Minimum = 181ms, Maximum = 190ms,
Average = 185ms</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=2>Why can't I ping and visit public net
under Red Hat Linux7.3? I am a beginer in Linux,please give me detail
command.</FONT></DIV>
<DIV><FONT size=2>Thanks in advance!</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Best regards,</FONT></DIV>
<DIV><FONT size=2>Edward</FONT></DIV></BODY></HTML>