Technical Unable to connect

Hello there. I`ve got an error during the connection "unable to connect. please try again later..."

Client 3.3.5 (12340) downloaded from https://www.warmane.com/download (expansion "Wrath of the Lich King" NOT "Old").

PS C:\Windows\system32> Get-Content 'C:\downloads\Wrath of the Lich King 3.3.5a\Logs\connection.log'
2/15 10:32:47.016 GRUNT: state: LOGIN_STATE_CONNECTING result: LOGIN_OK
2/15 10:33:08.019 GRUNT: state: LOGIN_STATE_FAILED result: LOGIN_SERVER_DOWN
2/15 10:33:08.019 GRUNT: state: LOGIN_STATE_FAILED result: LOGIN_FAILED
PS C:\Windows\system32>
PS C:\Windows\system32>
PS C:\Windows\system32> Get-Content 'C:\downloads\Wrath of the Lich King 3.3.5a\Data\enUS\realmlist.wtf'
set realmlist logon.warmane.com
PS C:\Windows\system32>
PS C:\Windows\system32>
PS C:\Windows\system32> nslookup logon.warmane.com
╤хЁтхЁ: sd.guei.alt
Address: 194.135.107.1

Не заслуживающий доверия ответ:
╚ь*: logon.warmane.com
Address: 188.138.40.87

PS C:\Windows\system32> nslookup logon.warmane.com 8.8.8.8
╤хЁтхЁ: google-public-dns-a.google.com
Address: 8.8.8.8

Не заслуживающий доверия ответ:
╚ь*: logon.warmane.com
Address: 188.138.40.87

PS C:\Windows\system32> ping logon.warmane.com

Обмен пакетами с logon.warmane.com [188.138.40.87] с 32 байтами данных:
Ответ от 188.138.40.87: число байт=32 время=83мс TTL=52
Ответ от 188.138.40.87: число байт=32 время=83мс TTL=52

Статистика Ping для 188.138.40.87:
Пакетов: отправлено = 2, получено = 2, потеряно = 0
(0% потерь)
Приблизительное время приема-передачи в мс:
Минимальное = 83мсек, Максимальное = 83 мсек, Среднее = 83 мсек
Control-C

As you can see the server name is resolved correctly and I can get icmp reply from it. The log says that server is down, but I think it`s not, cause I can see the population changes on the https://www.warmane.com/information.
I`ve no restrictions to the Internet (the FW is vyatta and there is a rule for the external interface that allows established/related connections).

The real strange thing is that conntrack does`nt show any entries during connection. Well lets see what conntrack says during pinging:

noko@NEO1GUEI:~$ conntrack -L | grep 188.138.40.87
icmp 1 19 src=194.135.107.184 dst=188.138.40.87 type=8 code=0 id=1 packets=4 bytes=240 src=188.138.40.87 dst=83.246.143.106 type=0 code=0 id=1 packets=4 bytes=240 mark=0 secmark=0 use=2

seems legit. But there are no entries during the WOW client attempt of connection.

Is it possible that the problem is in WOW client?