smbauth doesn't want to authenticate with my Windows 2003 server domain. When I test this I use the following command: /usr/lib/squid/smb_auth -W xxxxx -U 172.30.2.31 -S /loginscripts$ -d jpretorius xxxxx Domain name: xxxxx Pass-through authentication: no Query address options: -U 172.30.2.31 -R Domain controller IP address: 172.30.2.31 Domain controller NETBIOS name: PDC Contents of //PDC/loginscripts$/proxyauth: ERR I also tried an smb mount to the share on the server: mount -t smbfs -o username=jpretorius,password=xxxxx //pdc/loginscripts$ /mnt/smb/ I then get this output: cli_negprot: SMB signing is mandatory and we have disabled it. 25299: protocol negotiation failed SMB connection failed Is there possibly security settings I have to set in my Windows Domain (Group Policies)? A search on the web revealed that the smbclient doesn't support SMB signing which is a default requirement on 2003 server domains. Any help will be appreciated, Johan Pretorius