Hi, after getting crazy with NFS mounting problems I realized that the option: "allow_weak_crypto = true" is missing in the krb5.conf of the clients (and is present in the Krb5.conf ofthe main server), preventing NFS mounting, at least with the very recent kernels upgraded in the last two weeks. Putting this option into krb5.conf of the clients fix the problem Best Regards Giorgio -- Sysadmin SPSE-Tenero Ufficio: +41 91 735 62 48 Cellulare: +41 79 629 20 63