Telnet Security

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Services for UNIX provides two security options:

  • UNIX authentication, which uses the UNIX login and password. The password is sent as plaintext. This may be a security hazard as other network users may be able to snoop this transmission.

  • NTLM for authentication between a Services for UNIX Telnet Client and a Services for UNIX Telnet Server. NTLM uses pass-through authentication, in which the security credentials — domain name, user name, and hashed password — are passed through domain controllers for connections between trusted domains. The user is not prompted for login and password. This method is integrated with Windows security.
    Using NTLM, a user can use telnet to connect to a remote computer and access resources on that computer; however, the user cannot access other resources on the network without being authenticated again.

For more information about NTLM, see "Planning Distributed Security" in the Deployment Planning Guide .