ping不通网关

jiangbao1980

内网的一台机器，想做mail服务器，虚上公网的ip后，怎么也ping不通该ip的网关，可以ping通自己，配置如下，请大家指点：

[root@mx21 network-scripts]# more ifcfg-eth0
# Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet
DEVICE=eth0
BOOTPROTO=static
HWADDR=00:0d:87:9f:0f:44
ONBOOT=yes
NETMASK=255.255.255.0
IPADDR=192.168.0.174
GATEWAY=192.168.0.1
TYPE=Ethernet

[root@mx21 network-scripts]# more ifcfg-eth0:1
# Silicon Integrated Systems [SiS] SiS900 PCI Fast Ethernet
DEVICE=eth0:1
BOOTPROTO=static
HWADDR=00:0d:87:9f:0f:44
ONBOOT=yes
NETMASK=255.255.255.224
IPADDR=218.249.218.201
#GATEWAY=218.249.218.193
TYPE=Ethernet

[root@mx21 network-scripts]# more /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=pcoffline.cn
#GATEWAY=218.249.218.193
[root@mx21 network-scripts]#

[root@mx21 network-scripts]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
218.249.218.192 0.0.0.0         255.255.255.224 U     0      0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eth0

jiangbao1980

[root@mx21 network-scripts]# ping www.sina.com
PING jupiter.sina.com.cn (202.108.33.32) 56(84) bytes of data.
64 bytes from 202.108.33.32: icmp_seq=1 ttl=242 time=46.8 ms
ping 公网都是通的，但加上218.249.218.193这个默认路由后，公网都不通了。

finddream

路由问题，你添加了行的路由后将原内网的路由给覆盖掉了

jiangbao1980

[root@mx11 ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
218.249.218.192 0.0.0.0         255.255.255.224 U     0      0        0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         192.168.0.1     0.0.0.0         UG    0      0        0 eth0
[root@mx11 ~]#
[root@mx11 ~]#
[root@mx11 ~]# ping www.sina.com
PING jupiter.sina.com.cn (202.108.33.32) 56(84) bytes of data.
64 bytes from 202.108.33.32: icmp_seq=1 ttl=242 time=46.6 ms
64 bytes from 202.108.33.32: icmp_seq=2 ttl=242 time=46.5 ms

--- jupiter.sina.com.cn ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1000ms
rtt min/avg/max/mdev = 46.528/46.590/46.652/0.062 ms
[root@mx11 ~]# ping 218.249.218.193
PING 218.249.218.193 (218.249.218.193) 56(84) bytes of data.

--- 218.249.218.193 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1000ms

[root@mx11 ~]# more /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=mx21.yeeyoo.cn
GATEWAY=218.249.218.193
[root@mx11 ~]#
现在ping公网都是通的，只是ping这个网关不通啊，什么问题呢？