Some more news, I tried mounting the same export from a macosx client and it succeeded. There was a difference though when looking at the rpc.svcgssd output rpc.svcgssd -vvf: ================= leaving poll handling null request sname = maru@xxxxxxxxxx DEBUG: serialize_krb5_ctx: lucid version! prepare_krb5_rfc1964_buffer: serializing keys with enctype 4 and length 8 doing downcall mech: krb5, hndl len: 4, ctx len 85, timeout: 1280897678 (35627 from now), clnt: <null>, uid: 1000, gid: 1000, num aux grps: 8: ( 1) 1000 ( 2) 20 ( 3) 24 ( 4) 25 ( 5) 29 ( 6) 44 ( 7) 46 ( 8) 118 sending null reply finished handling null request entering poll leaving poll handling null request sname = maru@xxxxxxxxxx DEBUG: serialize_krb5_ctx: lucid version! prepare_krb5_rfc1964_buffer: serializing keys with enctype 4 and length 8 doing downcall mech: krb5, hndl len: 4, ctx len 85, timeout: 1280897678 (35627 from now), clnt: <null>, uid: 1000, gid: 1000, num aux grps: 8: ( 1) 1000 ( 2) 20 ( 3) 24 ( 4) 25 ( 5) 29 ( 6) 44 ( 7) 46 ( 8) 118 sending null reply finished handling null request As you can see it uses a different sname and there are two requests, while I only see one with the linux client. Of course uid and gid are different too. Kind regards, Michael -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html