Hi, I have a retro LAN running things like Sun SPARCclassics, Ultra1s, Win98 and WinXP. I decided to standardize most of the Sun boxes on the latest versions of OpenBSD that support their architectures (5.9 for Sun4c & Sun4m, 7.4 for Sun4u). I have a Debian 7 server with RAIDs to store all the packages, configs, games, etc. I like to use Samba to transfer the files back and forth between the various systems. I have always had all the smbd authenticate to a single smbd (on SERVER3) to simplify password management. But only Samba 4 is available on OpenBSD 7.4, and it won't authenticate against the Samba 3 on the Debian 7 server. Is there a way to get this to work? Here are the configs, minus all the parameters that are (I hope) irrelevant. SERVER3 "The authentication server" = Debian 7 "Wheezy" Samba-3.6.6-6 NOTE: This config has been working great for many years, I don't want to screw it up. [global] workgroup = WORKGROUP1 netbios name = SERVER3 server string = Samba Server %v on %h map to guest = Bad User obey pam restrictions = Yes pam password change = Yes passwd program = /usr/bin/passwd %u passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* . unix password sync = Yes lanman auth = Yes client NTLMv2 auth = No client lanman auth = Yes client plaintext auth = Yes name resolve order = lmhosts host wins bcast logon script = %U.bat logon path = \export\logon domain logons = Yes os level = 33 preferred master = Yes domain master = Yes wins support = Yes usershare allow guests = Yes idmap config * : range idmap config * : backend = tdb SUN6 "The authentication client" = OpenBSD-SPARC64 7.4 Samba-4.19.0v0 NOTE: I've been experimenting with different options here, this is just what is current. [global] workgroup = WORKGROUP1 netbios name = SUN6 server string = Samba Server %v on %h server role = MEMBER password server = SERVER3 hosts allow = 192.168.0. 127. dns proxy = no [sd2a] comment = sun6 filesystem share path = / valid users = root admin users = root read only = no browsable = yes To configure the various samba servers to all authenticate to SERVER3 I have always used this method: SERVER3# useradd -u 1006 -g 1006 -c "SUN6 Samba" -s /sbin/nologin -d /dev/null SUN6$ SERVER3# smbpasswd -a -m SUN6$ SUN6# smbpasswd -j WORKGROUP1 -U root SUN6# net join -S SERVER3 -U root ===But instead of joining, I get the following two lines of output==Password for [WORKGROUP1\root]: Failed to join domain: failed to lookup DC info for domain 'WORKGROUP1' over rpc: The transport connection is now disconnected. These are configs from some of the other Sun boxes running Samba 3 that has worked for a long time: SUN1 [global] workgroup = WORKGROUP1 netbios name = SUN1 server string = Samba Server %v on %h security = SERVER encrypt passwords = true password server = SERVER3 restrict anonymous = Yes name resolve order = host lmhosts wins bcast preferred master = False local master = No domain master = False hide dot files = No wide links = No follow symlinks = No [sda1] comment = SUN1 filesystem share path = / username = root read only = No SUN4 [global] workgroup = WORKGROUP1 netbios name = SUN4 server string = Samba Server %v on %h security = SERVER encrypt passwords = Yes password server = SERVER3 name resolve order = host lmhosts wins bcast preferred master = False local master = No domain master = False mangle case = Yes hide dot files = No wide links = No follow symlinks = No [sd0a] comment = SUN4 filesystem share path = / username = root read only = No I've been searching for the answer, but I don't think I'm using the correct search terms because I've not found an aanswer. Please note that rebuilding SERVER3 to the latest and greatest OS and Samba is not an option at this time. Any help getting this working would be greatly appreciated! Thanks, DJ