Use of telnet session

The usage of telnet session is described here today. Here we mainly analyze the remote connection between hosts. Let's take a closer look at the specific exit operations of the nested telnet session.

Home

Assume that the port is from Atelnet to B, and then from Btelnet to C. Press "^] q" to return directly to A. Why? Is there any way to return to B?

Cause

O normal

/| \ --------> Telnet session ---> machine C

/\ Chars on Machine A chars On Machine B chars

O escape NOT forwarded

/| \ --------> Telnet session -- XXX ---> telnet session ---> machine C

/\ On Machine A On Machine B

Method 1: Set the escape characters of two telnet instances to different ones.

Do not use ^] As the escape Character

Method 2: Enable telnet session A to send escape characters to telnet session B.

Assume that the escape character is ^]

Step 1: Enter the command mode of telnet session ).

O ^] NOT forwarded

/| \ -------> Telnet session -- XXX ---> telnet session ---> machine C

/\ On Machine A On Machine B

Run telnet session A to send the escape character to telnet session B to enter the command mode of telnet session B.

O "send escape" ^]

/| \ --------> Telnet session-X-> machine C

/\ On Machine A On Machine B

Send the exit command to telnet session B

O 'q' 'Q'

/| \ --------> Telnet session-X-> machine C

/\ On Machine A On Machine B