Port :2105eklogin Kerberos Remote Login

Port 2105 is designated for eklogin, an encrypted implementation of the traditional Unix rlogin service utilizing Kerberos authentication. Classic rlogin is a legacy protocol that provides users with remote shell access, historically transmitting credentials and session data in plaintext. eklogin enhances this by integrating Kerberos, a trusted network authentication protocol using tickets to securely verify identities without sending reusable credentials across the network.

The eklogin service functions by prompting clients to obtain a Kerberos ticket-granting ticket, which is then presented during login to authenticate the user and establish a secure communication channel. This reduces the attack surface associated with credential interception and facilitates encrypted communication, thereby improving confidentiality and integrity during remote shells.

Typically, eklogin operates in environments that prioritize security but maintain backward compatibility with existing rlogin workflows. It is especially useful in academic, enterprise, or governmental Unix systems where Kerberos is deployed for centralized authentication. While not widespread compared to SSH, it still appears in legacy systems relying heavily on Kerberos infrastructure.