D-Link 2890AL and set it as wireless switch, connected to TD-LTE modem via ethernet. I have no issue except when I want to ssh to a server, I have no such issue when I'm connected to TD-LTE modem directly.
One of my friends tell me that SPI may cause this, so I disabled SPI in my D-Link router but still ssh connection won't work.
I search the internet and couldn't find any similar issue and any solution. What setting is responsible for blocking ssh connections in my D-Link router?
P.S. I set my D-Link router as wireless switch because I have a network storage that connect to network via ethernet, and my D-Link router has gigabit ethernet port; so I can more read/write speed on my NAS.