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Edit File: telnet.xml
<?xml version="1.0" encoding="utf-8"?> <service> <short>Telnet</short> <description>Telnet is a protocol for logging into remote machines. It is unencrypted, and provides little security from network snooping attacks. Enabling telnet is not recommended. You need the telnet-server package installed for this option to be useful.</description> <port port="23" protocol="tcp"/> </service>