I have 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.

  • What actual problem are you having? What ssh command are you running? Do you get an error message? What does the error message say? – Kenster Sep 24 '17 at 22:37
  • @Kenster I get ssh_exchange_identification: read: Operation timed out error when I ssh into my server (ssh user@server_ip) – Behzadsh Sep 25 '17 at 3:55

I'm not sure the issue has fixed permanently or not, but it seems to be fixed by disabling Multicast Filter in my TD-LTE modem firewall settings.

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