Background:
Recently, I was doing a video surveillance project, in order to transmit the data of the intranet camera to the Internet (public network), I spent most of the day tinkering with cracking the optical cat, and now I use the TCP debugging tool as an example to record this process
Tools:
Two computers, Telecom Guangcat F460, tcp debugging tool
Steps and Methods:
1. Now the IP of Telecom Guangmao is not a public IP, if you log in to Telecom Guangmao and find that the WAN IP is 100. *. *. *, is not a public network IP, 100.* This network segment is a reserved network segment, specially reserved for telecom operators, at this time to do is to call the telecom customer service phone 10000 to ask it to change its optical cat IP to public network IP, of course, the replaced public network IP is also dynamically changing, the fixed public IP is charged separately, if you think that the IP obtained may not be a public IP, open it by yourselfThe hyperlink login is visible.Do a self-check to see if the detection IP and the optical cat obtain the same IP, the same is the public IP, otherwise you are on a fake network, you can make 10,000 complaints, and if it is not a public IP, you will definitely not be able to do port mapping.
Light cat for non-public network IP
There is a light cat with a public IP
2. Open the management page of the optical cat, enter the management IP to open, under normal circumstances, the management IP has a label at the bottom of the optical cat written on it has management IP, management username, password and other information, but we are doing the port forwarding function to use the super account to log in to the optical cat, the general super account is called telecomadmin, now the super password of the telecom is dynamically issued, a few days ago my home installed broadband telecom staff told me, he told me, if you need it in the future, you can call him, He can be found on their mobile app, or you can call the telecom customer service to call the person in charge of your area.
3. Connect to optical cat WiFi on computer A, use the tcp debugging tool on computer A to open a tcp server port (60000), log in to optical cat with a super account, click Apply and then click on virtual host configuration to enter the port mapping page, map 192.168.1.4:60000 on the intranet to 110.191.133.12:60000 on the public network, start the tick first, it will not take effect if you don't tick. Then the name can be written by yourself, it is best not to be Chinese, and then the protocol is selected according to its own open port, if it is not clear, you can choose "TCP AND UDP", the two spaces of the WAN can be filled in without filling, and the WAN link can choose the option that contains "INTERNET"; WAN port Fill in the port you want to open, if only one port is opened, the start and end port will be written the same, MAC address mapping is not checked, the virtual machine IP address is the IP address of your intranet host, the virtual machine port is the port you want to map, it is best to be the same as the WAN port, (of course, it can also be different, the WAN port shall prevail when accessing the external network), it is best to add it and you're done. After the mapping takes effect, a mapping table will appear below.
4. Computer B connects to the mobile phone traffic hotspot, so that the two computers are not in the same network segment, use the TCP debugging tool on computer B to open a TCP client, connect to the 60000 port of 110.191.133.12 on the public network, and can connect normally at this time, indicating that the use of optical cat to successfully achieve intranet penetration!
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Posted on 9/17/2019 9:11:36 PM
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