DNS resolution problems - Spain

Hi!

Not sure if bug or network problem.

1. The classical message (cannot contact Wrobot, disable firewall, etc) is triggered on startup.

2. I followed all suggested torubleshooting steps. However, I noticed that i was unable, also, to surf the wbrobot.eu web,so I obviously thought that it was a network connectivity problem.

3. I fired up Linux on the same machine (dual boot) and still, not able to browse wrobot.eu.

4. Tried from my phone (it is a different ISP). Same problem, wrobot.eu is down.

5. I used a Proxy service from the main machine (Windows 7) to browse from the USA. No problem at all.

6. I used another PC from another location, different ISP. No problem to browse wrobot.eu

So I tried nslookup to check the DNS resolution from my ISP's provider DNS (62.36.225.150)

Quote

> server  62.36.225.150
Default Server:  dnscache1.wanadoo.es
Address:  62.36.225.150

> wrobot.eu
Server:  dnscache1.wanadoo.es
Address:  62.36.225.150

*** dnscache1.wanadoo.es can't find wrobot.eu: Server failed

And then I tried using one OPENDNS root server (208.67.222.222):

Quote

> server 208.67.222.222
Default Server:  resolver1.opendns.com
Address:  208.67.222.222

> wrobot.eu
Server:  resolver1.opendns.com
Address:  208.67.222.222

Non-authoritative answer:
Name:    wrobot.eu
Address:  94.23.205.123

7. I tried again from my cellphone and wrobot.eu was up...for like 5 minutes.

8. Tried from another cellphone, different ISP provider. failed.

Conclusiosn:

a. There is a problem for the DNS resolution for wrobot.eu at least at Spain.

b. Four different ISP providers tested, two do not work, one does work intermitently, another one works.

If I edit the /etc/hosts file for wrobot.eu and set it manually to 94.23.205.123 IT DOES work browsing wrobot.eu; however other subdomains (download.wbot.com) don't work. I assume the subdomain/service Wrobot contacts is another different one and does not simply connect to wrobot.eu.

Have you changed DNS CNAM, A or TXT records for your domain recently?.

Regards.