how to tell if the local (router) assigned IP is public IP?
public IP: Global unique IP address.
there is a situation: pull the unicom bandwidth, the assigned IP can only be accessed within the Unicom, mobile network can not access. This IP can only be regarded as "unicom in the public network IP", not the real public network IP.
There are many ways to determine whether the local (routed) IP is a public IP, the following one by one listed for the reference of small partners.
first, empirical law:
1, the general telecommunications ADSL bandwidth before the large bandwidth is not upgraded is (dynamic) public network IP. If you spend a little money to upgrade to 100M fiber-optic Internet, 99.99% is the intranet IP, that 0.01% is I have not found the case.
2, Agent network operators 99.99% are intranet IP, such as the Great Wall bandwidth, friends e home and so on.
3, 99.99% of the fiber-optic Internet is the intranet IP. Many people are 100M exclusive internet access, tested sometimes download speed can have 10MBps (that is, 100Mbps). Note that the download speed is said here. Stillthere is a noun called the uplink speed, please know.
two, intuitive method:
1, 10 IP at the beginning is the intranet IP. That is, 10.0.0.0 to 10.255.255.255 is the intranet IP. A lot of home-pulled bandwidth routing is assigned to 10 IP, which is the network IP.
2, the address of the following IP segment is the intranet IP address.
(1) 10.0.0.0 to 10.255.255.255
(2) 172.16.0.0 to 172.31.255.255
(3) 192.168.0.0 to 192.168.255.255
Three, contrast method:
1, log in to your own route to see automatically assigned IP
2, LoginHttp://www.ip138.comWeb site to see the acquired IP address
3, LoginHttp://ip.qq.comlook at the IP address obtained
4, Login WanHttp://www.net.cn/static/customercare/yourip.aspView the acquired IP address
(such as WAN IP is two, it is the IP through the operator-switched intranet environment)
5, login to multiple well-known IP sites to view the comparison of IP address results,as long as one of the results IP inconsistencies, can be described as intranet IP. Note thatIP query site just get to your local export IP, even if it is a forwarded IP.
Four, inquiry method:
1, ask your own network provider directly, ask him to assign IP is not public IP, cross-network can not access to this IP. If the network operation provider is not sure, or can not guarantee that the public IP, or only provide you with the Internet, it means that the intranet IP.
Five, pro-test method:
1. Open the Remote Desktop locally and make sure that the LAN can be remote properly. Then look at the external and cross-network environments to see if they can be accessed via IP.
2, deploy a Web site app or other app locally, and make sure that the intranet is properly accessible. Then look at the external and cross-network environments to see if they can be accessed via IP.
Tips:
If the dynamic public network IP, you can use nat123 dynamic Domain name resolution to solve the problem of the public IP is not fixed.
if the 80 port of the public IP is blocked, you can use the nat123 80 mapping to penetrate, to build the public website server purpose.
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How to tell if the local router IP is public IP?
