We've been experiencing connectivity issues. Pre-establish connections work, and using IP's directly does too. Eg:
DANIELs-MacBook-Air-2:~ dani [master] $ ping 188.8.131.52 PING 184.108.40.206 (220.127.116.11): 56 data bytes 64 bytes from 18.104.22.168: icmp_seq=0 ttl=45 time=110.700 ms
But same server using google.com instead.
DANIELs-MacBook-Air-2:~ dani [master] $ ping google.com ping: cannot resolve google.com: Unknown host
At first I thought it was a DNS problem, so I set the Router DNS and my machine to use:
22.214.171.124 126.96.36.199 188.8.131.52 184.108.40.206
Which are GoogleDNS servers and OpenDNS servers. So what else can't it be that machines are improperly resolving.
Based on comment, I tried resolving and passing in the DNS server directly and still had a timeout:
$ dig @220.127.116.11 google.com ; <<>> DiG 9.8.3-P1 <<>> @18.104.22.168 google.com ; (1 server found) ;; global options: +cmd ;; connection timed out; no servers could be reached