Smb mount netware home volume to OES2 Linux. (used to use cifs but this
stopped working after an update). Volume is used for Apache public_html
home directories. Working quite well for a few months, then volumes
stopped mounting. Turned firewall off and could mount again. No
configuration changes were made. What could have caused this? An update?

Currently have firewall off. What would be an appropriate setting for
the firewall?