CentOS 6.6下双网卡共享上网配置
时间:2015-10-15 01:39 来源:linux.it.net.cn 作者:IT
实现方式:通过设置iptables的nat规则,使内网服务器可以访问Internet
[root@MySQL-server ~]
# cat /etc/redhat-release
CentOS release 6.6 (Final)
[root@MySQL-server ~]
# uname -r
2.6.32-504.el6.x86_64
[root@MySQL-server ~]
# uname -m
x86_64
==========================================================================
主机名 外网 内网
Web-Lnmp02 eth0:192.168.73.171 eth1:192.168.56.130
MySQL-server eth0:192.168.56.129
DNS:192.168.73.2
注:内网使用仅主机模式连接,手动设置IP
外网使用NAT模式连接,使用dhcp动态获取的IP
==========================================================================
[root@Web-Lnmp02 network-scripts]
# echo "net.ipv4.ip_forward = 1">>/etc/sysctl.con
[root@Web-Lnmp02 network-scripts]
# sysctl -p
[root@Web-Lnmp02 ~]
# iptables -F
[root@Web-Lnmp02 ~]
# iptables -P INPUT ACCEPT
[root@Web-Lnmp02 ~]
# iptables -P FORWARD ACCEPT
[root@Web-Lnmp02 ~]
# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
[root@Web-Lnmp02 ~]
# /etc/init.d/iptables save
[root@Web-Lnmp02 ~]
# /etc/init.d/iptables restart
说明:
iptables -F
#清除原有的filter有中的规则
iptables -t nat -F
#清除原有的nat表中的规则
iptables -P FORWARD ACCEPT
#缺省允许IP转发
[root@MySQL-server ~]
# cat /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
ONBOOT=
yes
NM_CONTROLLED=
yes
BOOTPROTO=none
USERCTL=no
HWADDR=00:0c:29:e2:0e:85
IPADDR=192.168.56.129
NETMASK=255.255.255.0
GATEWAY=192.168.56.130
IPV6INIT=no
[root@MySQL-server ~]
# cat /etc/resolv.conf
; generated by
/sbin/dhclient-script
search localdomain
nameserver 192.168.73.2
[root@MySQL-server ~]
# ping www.baidu.com
PING www.a.shifen.com (61.135.169.125) 56(84) bytes of data.
64 bytes from 61.135.169.125: icmp_seq=1 ttl=127
time
=5.89 ms
64 bytes from 61.135.169.125: icmp_seq=2 ttl=127
time
=9.49 ms
64 bytes from 61.135.169.125: icmp_seq=3 ttl=127
time
=6.14 ms
(责任编辑:IT)
(责任编辑:IT) |