Hello All, I have configured squid-2.6.STABLE.13 + for basic scheme authentication using ntlm_auth helper that come with samba. But I am not able to successfully authentocate the users. When I tested the auth_helper in command line it gave the following error message #/usr/bin/ntlm_auth --helper-protocol=3Dsquid-2.5-basic jas jas ERR But the same server is able to authenticate when I use msnt_auth helper that come with squid. Is there anyother change I have to make samba/squid to make it work with ntlm_auth helper. The wbinfo command gave the message as follows. #wbinfo -t checking the trust secret via RPC calls failed error code was NT_STATUS_CANT_ACCESS_DOMAIN_INFO (0xc00000da) Could not check secret The portion of squid configuration file is given below auth_param basic program /usr/bin/ntlm_auth --helper-protocol=3Dsquid-2.5-basic auth_param basic children 6 auth_param basic realm Internet Access auth_param basic credentialsttl 2 hours acl ntlm_users proxy_auth REQUIRED http_access allow ntlm_users http_access deny all The portion of samba configuration file is given below [global] workgroup = mydomain server string = mydomain jag hosts allow = 10.1. 127. security = user password server = 10.1.1.32 encrypt passwords = yes smb passwd file = /etc/samba/smbpasswd passwd program = /usr/bin/passwd %u username map = /etc/samba/smbusers socket options = TCP_NODELAY SO_RCVBUF=3D8192 SO_SNDBUF=3D8192 local master = yes os level = 64 domain master = yes preferred master = yes domain logons = yes wins support = no dns proxy = no winbind enum users = yes winbind enum groups = yes winbind separator = + winbind cache time = 10 winbind uid = 10000-20000 winbind gid = 10000-20000 winbind use default domain = yes Please any one help me to solve this problem. Thanks, -Jegadeesh