Re: Yet another Quadruple DNS?

2018-03-29 Thread Igor Krneta

From 1.1.1.1 website:

Cloudflare DNS resolver:
**

 * For IPv4:*1.1.1.1*and/or*1.0.0.1*
 * For IPv6:*2001:2001::*and/or*2001:2001:2001::*

Its catchy enough for IPV6 :).

On 29.3.2018 15:07, Chip Marshall wrote:

I think the real question is "when are we going to get some memorable
IPv6 public recursive DNS servers?"

2001:4860:4860:: or 2620:fe::fe just aren't quite as catchy as
8.8.8.8 or 9.9.9.9.





Problems with Skype video - outgoing calls only

2018-03-27 Thread Igor Krneta

Hi guys,

last few days we have a several of our customers complaining about weird 
problem with skype video chat.


When they try to initiate video call from their computer, call fails and 
receiving side gets notification that they were called. But when 
receiving side tries to call them, call gets through immediately, no 
problems.


This affects only video calls. Audio calls, chat, file transfer, group 
conference all work without any problems during the same session. And we 
have sent our tech's to customer premises with our own equipment.


They too have the same problem while on location while using our 
laptops/phones/tablets.


After customers started complaining, we switched their IP address to 
some of our other IP ranges and problem was gone for some time.


Now, we have started getting reports of skype video not working from our 
other IP ranges.


What's most frustrating about this problem is that it's not a problem 
for all users in particular subnet, only a few of them at time. For 
others, everything works as usual.


We have checked and double checked everything about our network, and all 
is well and in normal parameters.


No new firewalls/rules/equipment change/updates

Anyone having same issues maybe ?


Sincerely,

Igor Krneta

Elta Kabel d.o.o.





Contact info, AS4766 Korea Telecom

2017-12-04 Thread Igor Krneta

Hi,

is there anyone from Korea Telecom on this list ?

Trying to contact anyone in NOC, it seems that they blacklisted our 
complete AS (198252) and they are not responding to e-mail. Our customer 
support is overwhelmed with complaints about non reachable servers 
hosted in their network.


Any help is appreciated.


Sincerely,

Igor Krneta

Elta Kabel d.o.o.