Can't connect via SSH by user@domain.tld but can via user@ip.ad.re.ss

August 8, 2017 111 views
Firewall Ubuntu 16.04

I have a droplet set up with a LEMP stack and domain name. I can connect to the default Nginx page using the domain in a web browser. Nmap successfully scans the server and correctly resolves the domain to the IP address. Ping does not. I am able to connect via SSH using the IP address, however if I try using ssh user@domain.tld, it hangs for at least five minutes (I have not left it on longer).

I suspect the issue may have to do with my local firewall, however I am unsure.

1 Answer

It could be firewall, but could also be rDNS. Make sure to properly configure reverse DNS to prevent long delays when things try to look it up. Make sure that the hostname specified in the DO interface is correct, as it populates the rDNS entry accordingly.

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