It started happening some time ago. it doesn't seem there's a pattern.
First, SMB ports are all open in firewall, 137,138,139,445. Wireshark shows client connects then RST (reset) connection.
Network team repeatedly confirmed that there was no change no error no deny log, everything is fine.
I virtually followed all solutions online for two days modifying registry, doesn't work. When client connects to share folders by \\xxx.xxx.xxx.xxx\share1, it throws 0x80004005 and windows events related to SMB:
Any comment, will be appreciated