Hi, Iam planning to secure telnet/http connections from any linux/windows box. for this iam using pam_opie PAM module which basically is one form of OTP(one time passwd) authentication module. The authenticator is a linux box, so should i go for open ssh or PPP protocol like OTP (using pam_opie PAM module). SSH also has Challenge response implemented. But it might be slower due to asymmetric encryption. Please let me know your comments/suggestions. Regards, Sudarshan _______________________________________________ Pam-list mailing list Pam-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/pam-list