Port 23Telnet
Telnet Protocol
About Port 23
Telnet provides bidirectional interactive text-oriented communication. It was historically used for remote administration but has been largely replaced by SSH due to security concerns.
Security NotesTelnet transmits all data including passwords in plaintext. It should never be used for remote administration. Replace with SSH wherever possible.
Total Hosts
7.7M
TLS Encrypted
0.0%
Vulnerable Hosts
96.0K
Countries
10+
Top Services
| telnet | 7,332,327 |
| ssh | 119,443 |
| http | 110,668 |
| unknown | 73,964 |
| mongodb | 12,905 |
| ftp | 11,947 |
| nagios-nsca | 3,505 |
| mysql | 2,335 |
| dominoconsole | 1,323 |
| smtp | 1,275 |
Top Countries
 Brazil | 1,094,273 |
 China | 976,155 |
 United States | 340,526 |
 Japan | 314,347 |
 Pakistan | 297,815 |
 Russia | 250,454 |
 Colombia | 240,064 |
 Italy | 224,061 |
 South Korea | 193,446 |
 Egypt | 180,971 |
Top Products
| Telnet | 2,120,357 |
| Proxy | 110,111 |
| HP H3C SR8808 SecBlade firewall module telnetd | 99,849 |
| OpenSSH | 95,248 |
| Draytek Vigor router telnetd | 15,786 |
| Dropbear sshd | 11,674 |
| MongoDB | 5,338 |
| ProFTPD mod_sftp | 5,126 |
| Microsoft ftpd | 4,481 |
| Nagios NSCA | 3,505 |