PROBLEM:
- starting with smbclient 4.6.0rc1, smbclient won't populate the browse list unless server has "domain logons = yes" (or maybe equivalent)

- smbclient up to 4.5.14 can always get another samba's ("standalone server") browse list (as in "source3/client/client.c/list_servers()")
- since old smbclient versions work, I think this is an smbclient problem (not server)


DETAILS:
- client and server are RHEL5
- server has samba 3.x or 4.7.0 (doesn't matter)
- smb.conf of server at the end of this post
- smbclient tested:  3.x, 4.5.14, 4.6.0.rc1 4.6.8 4.7.0
- flipping "domain logons" yes/no on the server, w/o restarting the server, will cause smbclient >= 4.6.0rc1 to display/not-display the server browse list.
- with smbclient <= 4.5.14 the browse list is always displayed, regardless of "domain logons" on server
- i see some changes in source3/client/client.c in 4.6.0rc1 (cli_session_setup -> cli_session_setup_creds)


SAMPLE OUTPUT (4.7.0 server w/o domain logons):

==== smbclient 4.5.14 ===================================
./samba-4.5.14/bin/smbclient -s /dev/null -g -mNT1 -L 192.168.1.4 -Uuser2%user2
Domain=[TEST-WG] OS=[Windows 6.1] Server=[Samba 4.7.0]
Domain=[TEST-WG] OS=[Windows 6.1] Server=[Samba 4.7.0]
Disk|tmp|
IPC|IPC$|IPC Service (Samba 4.7.0)
Server|TEST-SAMBA|Samba 4.7.0      <=== WORKS
Workgroup|TEST-WG|TEST-SAMBA

==== smbclient 4.6.0.rc1 ==================================
./samba-4.6.0rc1/bin/smbclient -s /dev/null -g -mNT1 -L 192.168.1.4 -Uuser2%user2
Domain=[TEST-SAMBA] OS=[] Server=[]
Domain=[TEST-SAMBA] OS=[] Server=[]
Disk|tmp|
IPC|IPC$|IPC Service (Samba 4.7.0)
Workgroup|TEST-WG|TEST-SAMBA       <=== BROWSE LIST MISSING

==== smbclient 4.7.0 =====================================
./samba-4.7.0/bin/smbclient -s /dev/null -g -mNT1 -L 192.168.1.4 -Uuser2%user2
Disk|tmp|
IPC|IPC$|IPC Service (Samba 4.7.0)
Reconnecting with SMB1 for workgroup listing.
Workgroup|TEST-WG|TEST-SAMBA           <=== BROWSE LIST MISSING

==============================

SAMPLE OUTPUT (4.7.0 server with "domain logons = yes"):

==== smbclient 4.5.14 ===============================
./samba-4.5.14/bin/smbclient -s /dev/null -g -mNT1 -L 192.168.1.4 -Uuser2%user2
Domain=[TEST-WG] OS=[Windows 6.1] Server=[Samba 4.7.0]
Domain=[TEST-WG] OS=[Windows 6.1] Server=[Samba 4.7.0]
Disk|tmp|
IPC|IPC$|IPC Service (Samba 4.7.0)
Server|TEST-SAMBA|Samba 4.7.0              <=== WORKS AS BEFORE
Workgroup|TEST-WG|TEST-SAMBA

==== smbclient 4.6.0.rc1 =================================
./samba-4.6.0rc1/bin/smbclient -s /dev/null -g -mNT1 -L 192.168.1.4 -Uuser2%user2
Domain=[TEST-WG] OS=[] Server=[]
Domain=[TEST-WG] OS=[] Server=[]
Disk|tmp|
IPC|IPC$|IPC Service (Samba 4.7.0)
Server|TEST-SAMBA|Samba 4.7.0                <=== NOW IT WORKS
Workgroup|TEST-WG|TEST-SAMBA

==== smbclient 4.7.0 ====================================
./samba-4.7.0/bin/smbclient -s /dev/null -g -mNT1 -L 192.168.1.4 -Uuser2%user2
Disk|tmp|
IPC|IPC$|IPC Service (Samba 4.7.0)
Reconnecting with SMB1 for workgroup listing.
Server|TEST-SAMBA|Samba 4.7.0                <=== NOW IT WORKS
Workgroup|TEST-WG|TEST-SAMBA

This is the smb.conf on the server:
[global]
workgroup = TEST-WG
netbios name = TEST-SAMBA
passdb backend = smbpasswd
smb passwd file = /etc/samba/smbpasswd
load printers = no
;domain logons = yes   (switched yes/no for tests)
preferred master = yes
os level = 30
null passwords = yes
server string = Samba %v
encrypt passwords = yes
security = user
map to guest = bad user
guest account = ftp
[tmp]
path = /tmp
guest ok = yes
writeable = yes