DNS Filtering and use USB 3G - AERO2

[pepeEL]

Hello
I use in Poland for backup connection internet provider named AERO2 by modem USB 3G. This provider is free with speed 512 kbps but one of the problem is to type CAPTCHA code by about 1 hours. When i use DSN Filtering i can not show page when i must write CAPTCHA code

http://bdi.free.aero2.net.pl:8080

In DNS Filtering i removed adress DNS in 3 row custom and has empty. This not resolved my problem. When i disabled DSN Filtering i can write code in this page

http://bdi.free.aero2.net.pl:8080

Page was open ok. When DNS Filterin is Enabled page not open. I user OpenDNS and other and have still problem. On OpenDNS i add this adress to ALLOW but nothing...

How i can resolve this problem ? Maybe RMerlin can some changes in DSN to work with my provider ?

Please help me.

 

[pepeEL]

Anybody help me.... please

 

[gettb4]

It is possible to use Aero2 and resolve captha with custom DNS IP for example OpenDNS Family Shield, to get it working you must:

1.Obtain IP of DNS supplied by default by Aero2 provider,

for usb modem and windows 10 you can:
a)plug USB modem to your computer and connect to internet supplied by aero2
b) Open terminal: Run>cmd(command prompt) type ipconfig /all , find something like this:

Mobile Broadband adapter Cellular:

   Description . . . . . . . . . . . : HUAWEI Mobile Connect - Network Adapter (your USB modem)

   DNS Servers . . . . . . . . . . . : 212.2.96.51
                                       212.2.96.52

write down DNS IP's:
212.2.96.51 and 212.2.96.52

2. In you router configuration: override default DNS IP's supplied by your ISP, to use these DNS IP's:
212.2.96.51(from Aero2, obtained in step number 1.)
208.67.220.123 ( for example from OpenDNS FamiliShield)
3. Install dnsmasq and append to /etc/resolv.conf

nameserver 208.67.220.123
nameserver 212.2.96.52

order of IP's in this file is really important!

4. make sure that you have strict-order in /etc/dnsmasq.conf:

# By  default,  dnsmasq  will  send queries to any of the upstream
# servers it knows about and tries to favour servers to are  known
# to  be  up.  Uncommenting this forces dnsmasq to try each query
# with  each  server  strictly  in  the  order  they   appear   in
# /etc/resolv.conf
strict-order

Why order is important ? How it works?

• When you have to resolve captha only network traffic to is permitted:
  - DNS supplied by Aero2 212.2.96.51 and 212.2.96.52
  - http://bdi.free.aero2.net.pl:8080

• To display captha your router have to use 212.2.96.51 or 212.2.96.52 DNS IP's and allow DNS rebinding for bdi.free.aero2.net.pl, consider disabling DNS rebinding protection or add bdi.free.aero2.net.pl to exception list.

• /etc/resolv.conf defines order of DNS suppliers. By default(after resolving captha successfully) first available DNS server from list is used 208.67.220.123 OpenDNS FamiliShield in this case
  When first DNS is not reachable(when you have to resolve captha) router tries second DNS server from list 212.2.96.51 in our example