Ubuntu 14.04 Port Mapping
Original JavyZheng Last post on 2015-12-10 15:58:43 Reads 6730 collection
launched
Ubuntu 14.04 Port Mapping
Ubuntu 1404 port mapping
BACKGROUND
method of
a non-permanent
permanent
BACKGROUND
A cluster, only one public IP, external network clients need to access services within the network a machine is running, then the need to achieve through port forwarding.
Assuming you configure
Machine1: external network IP: 113.30.150.75 card: em0, network IP: 192.168.0.1 card: em1
Machine6: Intranet IP: 192.168.0.6
demand
To access the services provided by the 192.168.0.6:9000 access 113.30.150.75:19000, coming 113.30.150.75:19000 mapped to 192.168.0.6:9000
method
Non-permanent
Machine1 above:
The sudo echo. 1 $> / proc / SYS / NET / IPv4 / ip_forward
$ the sudo iptables -t NAT -A the PREROUTING -p TCP -s 0/0 -d 113.30.150.75 19000 --dport -j DNAT --to 192.168.0.6 : 9000
$ -A the sudo iptables -t NAT TCP --dport the POSTROUTING -d 192.168.0.6 -p 9000 -o -j EM1 the SNAT --to 192.168.0.1
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thus can, but if Machine1 restarted, the configuration will lost. If you want to restart Machine1, still retains mapping.
permanent
Machine1 above:
Sudo vim /etc/rc.local $
1
at the end of the file, add the following lines, note that without the sudo,
. 1 echo> / proc / SYS / NET / IPv4 / ip_forward
iptables -t NAT -A the PREROUTING -p TCP -s 0/0 -d 113.30.150.75 19000 --dport -j DNAT --to 192.168.0.6:9000
iptables - -A -d 192.168.0.6 the POSTROUTING NAT T -p 9000 -o EM1 -j TCP --dport the SNAT --to 192.168.0.1
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to.
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