MikroTik RouterOS implements industry standard Telnet server. It uses port 23, which must not be disabled on the router in order to use the feature.
You can enable/disable this service or allow the use of the service to certain IP addresses.
[admin@MikroTik] ip service> print detail Flags: X - disabled, I - invalid 0 name="telnet" port=23 address=0.0.0.0/0 1 name="ftp" port=21 address=0.0.0.0/0 2 name="www" port=80 address=0.0.0.0/0 [admin@MikroTik] ip service> set 0 address 10.10.10.0/24 [admin@MikroTik] ip service>
You can type something that cannot be treated as an IP address into the telnet prompt in order to use advanced telnet mode. This is for advanced users only.
[admin@MikroTik] > /system telnet 192.168.0.2 Trying 192.168.0.2... Connected to 192.168.0.2. Escape character is '^]'. MikroTik v2.7rc4 Login: admin Password: MMM MMM KKK TTTTTTTTTTT KKK MMMM MMMM KKK TTTTTTTTTTT KKK MMM MMMM MMM III KKK KKK RRRRRR OOOOOO TTT III KKK KKK MMM MM MMM III KKKKK RRR RRR OOO OOO TTT III KKKKK MMM MMM III KKK KKK RRRRRR OOO OOO TTT III KKK KKK MMM MMM III KKK KKK RRR RRR OOOOOO TTT III KKK KKK MikroTik RouterOS v2.7 (c) 1999-2003 http://www.mikrotik.com/ Terminal unknown detected, using single line input mode [admin@MikroTik] >Advanced Telnet command mode:
[admin@MikroTik] > system telnet
:
telnet> ?
Commands may be abbreviated. Commands are:
close close current connection
logout forcibly logout remote user and close the connection
display display operating parameters
mode try to enter line or character mode ('mode ?' for more)
open connect to a site
quit exit telnet
send transmit special characters ('send ?' for more)
set set operating parameters ('set ?' for more)
unset unset operating parameters ('unset ?' for more)
status print status information
toggle toggle operating parameters ('toggle ?' for more)
slc set treatment of special characters
z suspend telnet
environ change environment variables ('environ ?' for more)
telnet>