How do I determine whether an IP address assigned to a local router is a public IP address?
Public IP: The only IP address in the world.
There is such a situation: the bandwidth of Unicom can only be accessed within Unicom, and the mobile network cannot be accessed. This IP can only be regarded as a "public network IP within China Unicom" at most, not a real public network IP.
There are many ways to determine whether the local (routing) IP is a public IP, and the following is listed one by one for your reference.
1. Empirical method:
1. The general telecom ADSL bandwidth is (dynamic) public IP before upgrading the large bandwidth. If you spend a small amount of money to upgrade to 100M fiber optic Internet access, 99.99% is an intranet IP, then 0.01% is a case I haven't found yet.
2. 99.99% of proxy network operators are intranet IPs, such as Great Wall Bandwidth, Juyou Ejia, etc.
3. 99.99% of fiber optic Internet access is intranet IP. Many people have 100M exclusive Internet access, and sometimes the download speed can be 10MBps (i.e. 100Mbps). Note the download speed mentioned here. There is also a term called upward speed, please know.
2. Intuitive method:
IPs starting with 1 and 10 are all private IP addresses. That is, 10.0.0.0 to 10.255.255.255 are private IPs. Many of the bandwidth routes they pull are assigned IPs starting with 10, which are all intranet IPs.
2. The addresses of the following IP segments are all private IP addresses.
(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
3. Comparison method:
1. Log in to your route to see the automatically assigned IP
2. Log in to the http://www.ip138.com website to see the IP address obtained
3. Log in http://ip.qq.com to see the obtained IP address
4. Log in to Wanwang http://www.net.cn/static/customercare/yourip.asp to view the IP address obtained
(If there are two IPs obtained by Wanwang, it is the intranet environment where the IP is converted by the operator)
5. Log in to multiple well-known IP checking websites to view the IP address result comparison, as long as one of the result IP is inconsistent, it can indicate that it is a private IP address. Note that the IP lookup site only gets the IP to your local export, even if it is a forwarded IP.
4. Inquiry method:
1. Ask your network provider directly if the IP assigned to him is a public IP and whether this IP can be accessed across the network. If the network operator is not sure or cannot guarantee that it is a public IP, or only provides you with Internet access, it means that it is a private IP.
5. Personal measurement method:
1. Enable the remote desktop locally and ensure that the remote can be remote normally in the LAN. Then check the external network and cross-network environment (China Telecom, Unicom, Mobile, etc.) to see if it can be accessed through IP.
2. Deploy a website application or other applications locally and ensure that the intranet can be accessed normally. Then check whether it can be accessed through IP in the external network and cross-network (telecom, Unicom, mobile, etc.) environments.
Prompt:
If you have a dynamic public IP address, you can use nat123 dynamic domain name resolution to solve the problem of unstable public IP address.
If port 80 of the public IP is blocked, you can use nat123's 80 mapping penetration to achieve the purpose of building a public website server.
If you do not have a public IP address, you can use nat123 port mapping to map any private network address to the public network to provide public network access, including 80 mapping, full port mapping, http, https, tcp, udp, ftp, broadcast, and access to any port and any application. |
Posted on 10/18/2017 3:57:32 PM
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Posted on 5/7/2018 9:28:17 PM
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