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'''`telnet(1)`''' is a text-based communication protocol and virtual terminal. Historically, `telnet(1)` was used in a similar manner to modern [[Encryption/SSH|SSH]]. |
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=== Star Wars === {{{ telnet towel.blinkenlights.nl }}} |
Telnet
telnet(1) is a text-based communication protocol and virtual terminal.
Historically, telnet(1) was used in a similar manner to modern SSH.
Contents
Installation
Configuration
Usage
Star Wars
telnet towel.blinkenlights.nl
SMTP
To use telnet(1) for SMTP, try running telnet smtp.example.com 25. This opens a REPL, which is annotated here with arrows denoting user input (->), server response (<-), and local client messages (-).
- Trying smtp.example.com... - Connected smtp.example.com. - Escape character is '^]'. <- 220 smtphostname ESMTP Postfix -> ehlo smtphostname <- 250-smtphostname <- 250-PIPELINING <- 250-SIZE 10240000 <- 250-VRFY <- 250-ETRN <- 250-ENHANCEDSTATUSCODES <- 250-8BITMIME <- 250-DSN <- 250-SMTPUTF8 <- 250-CHUNKING -> mail from: [email protected] <- 250 2.1.0 Ok -> rcpt to: [email protected] <- 250 2.1.5 Ok -> data <- 354 End data with <CR><LF>.<CR><LF> -> This is the body of an email. -> Exit this REPL by submitting a line that only contains a period. -> . <- 250 2.0.0 Ok: queued as 0123456789ab -> quit <- 221 2.0.0 Bye - Connection closed by foreign host.