> For the complete documentation index, see [llms.txt](https://docs.editran.onesait.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.editran.onesait.com/documentacion-editran/ibm-editran-v5.3-ims-en/tcp-ims-documentacion-tecnica/recursos-tcp-ip.md).
# TCP/IP resources
The TCP/IP configuration files of the installation will be modified to include the connection to the application. TCPIP.PROFILE and TCPIP.DATA will be created or modified, and a TCP region accessible from IMS will be enabled.
## TCPIP.PROFILE file
Optionally, the Editran port can be reserved for exclusive use using the PORT macro. To do this, the job name of the Listener, started using the ZTBPJLIS JCL, is assigned to the Editran port (usually 7777). This allows no other application to listen on that port.
```
PORT
7777 TCP KI1056EI ; IMS Socket
```
## TCPIP.DATA file
The name of the TCP/IP address space startup procedure can be taken to include it in the Editran environment profile as TCP/IP REGION and in the Listener configuration file as TCPNAME. In this case, the TCP processes run on that IP stack. If nothing is specified, each TCP process would run on the IP stack that would correspond by default to that region (SYSTCPD entry). In any case, the Listener and the Client-Server must run on the same IP stack.
```
;
TCPIPJOBNAME TCPIPB2
```
---
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