[resolved][ovh] dig connection timed out on external udp enquiry to bind (tcp work)

Help! (Home for newbies)
1

Hello

When i do : dig @dns1.greendns.net www.coinmontagne.com i’ve a : connection timed out; no servers could be reached

On local server, it’s ok… the dns1.greendns.net is the same server as www.coinmontagne.com

If i do nmap -sU -p 53 dns1.greendns.net i’ve got :

nmap -sU -p 53 dns1.greendns.net

Starting Nmap 6.00 ( http://nmap.org ) at 2017-10-30 09:50 CET
Nmap scan report for dns1.greendns.net (87.98.140.68)
Host is up (0.00048s latency).
PORT STATE SERVICE
53/udp open domain

Nmap done: 1 IP address (1 host up) scanned in 0.28 seconds


and now if i do dig @dns1.greendns.net www.coinmontagne.com it’s ok… i’ve a good answer…

but tomorrow, there is the same problem…

An idea please ?

2

up please

3

Someone is going to have to explain this to me, if your coinmontagne website is working what is the problem exactly?

4

After a few month, i’ve resolved the problem.

In ovh, and on the ip failover, there was activated a “firewall gaming” for gamer, and block udp connection like 53/udp for bind.

That was complicated to find that, because if i initialise a connection on tcp/53 the udp/53 was worked…

Just disable this firewall and all is ok.

Regards