Hi List, first off all thanks for all your tips and hints abou "sftp without ...". Now I try to limit users by configuring PAM but get frustrated: My /etc/pam.d/sshd : #%PAM-1.0 auth required /lib/security/pam_unix.so # set_secrpc auth required /lib/security/pam_nologin.so auth required /lib/security/pam_env.so auth required /lib/security/pam_warn.so account required /lib/security/pam_access.so account required /lib/security/pam_unix.so password required /lib/security/pam_pwcheck.so password required /lib/security/pam_unix.so use_first_pass use_authtok session required /lib/security/pam_unix.so none # trace or debug session required /lib/security/pam_limits.so and /etc/pam.d/login: #%PAM-1.0 auth requisite /lib/security/pam_unix.so nullok #set_secrpc auth required /lib/security/pam_securetty.so auth required /lib/security/pam_nologin.so #auth required /lib/security/pam_homecheck.so auth required /lib/security/pam_env.so auth required /lib/security/pam_mail.so account required /lib/security/pam_unix.so password required /lib/security/pam_pwcheck.so nullok password required /lib/security/pam_unix.so nullok use_first_pass use_authtok session required /lib/security/pam_unix.so none # debug or trace session required /lib/security/pam_limits.so For testting I put the line the line: thom soft maxlogins 1 in /etc/security/limits.conf. Logging into the computer from a local point (tty, su - thom) works fine. The attempt to have a second shell leads to the expected result but I can do have any number of ssh-sessions to this computer. My sshd is OpenSSH_2.5.1p1. Thanks in advance Thom -- ------------------------------------------------------------------- bye bye (c) by Thom | Thorsten Marquardt | EMail: THOM@kaupp.chemie.uni-oldenburg.de | Member of the pzt project. | http://kaupp.chemie.uni-oldenburg.de/pzt -------------------------------------------------------------------