Ok, so you either change your clients to use "sec=ntlmssp", or change "ntlm auth" on the server to "yes" as explained by @metze in comment #17.
This sec= setting in mount.cifs also changed defaults. From its manpage: "The default in mainline kernel versions prior to v3.8 was sec=ntlm. In v3.8, the default was changed to sec=ntlmssp." So if you just remove it, it will use ntlmssp already. Kernel 3.8 was shipped in Ubuntu sometime between precise (3.2) and trusty (3.13). Thanks for your comments, @metze -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1703490 Title: Unable to mount network volume on 17.10 Samba server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1703490/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
