I'm building my pam.d entries from scratch, and have run into a problem with su - not authenticating. here is the log: Aug 16 18:03:34 webby PAM-warn[25069]: function=[pam_sm_authenticate] service=[su] terminal=[ttyp1] user=[root] ruser=[Alan] rhost=[<unknown>] Aug 16 18:03:35 webby su[25069]: pam_authenticate: Authentication failure Aug 16 18:03:35 webby su[25069]: - ttyp1 Alan-root the rhost= entry I am having trouble resolving. There appears to be no need for a rhosts.conf file or similar. Alan