Changing DNS settings on an AIS Fiber router

[Zaphod Priest]

Over the last couple of weeks a few sites have become inaccessible without a VPN.  The problem appears to be AIS' DNS servers.  I've looked everywhere on the router admin panel, but can't find anywhere to specify fixed ip addresses.  Is there an option there? Is it even possible?  The router model number is A622.

Thanks.

[a269652]

I began experiencing the very same issue reported above a few weeks ago in Bangkok. It started with the Daily Mail's website and then extended to a number of others, and can only be circumvented, in my case, by using a VPN. It only very recently occurred to me that the cause of the problem is my AIS Fibre internet connection.

 

Before I attempt to contact the nice people at AIS, has anyone else encountered such situation and/or can offer a solution other than using a VPN?

[topt]

On 6/23/2025 at 9:55 AM, Zaphod Priest said:

I've looked everywhere on the router admin panel, but can't find anywhere to specify fixed ip addresses.

Unless I am misunderstanding fixing your IP address is not going to change DNS site lookup. If you are using a pc/laptop have you tried specifying ia different dns rather than AIS's in the adaptor settings?

 

7 hours ago, a269652 said:

can offer a solution other than using a VPN?

Try the same and see if it helps. 

[KhunHeineken]

On 6/23/2025 at 2:55 AM, Zaphod Priest said:

Over the last couple of weeks a few sites have become inaccessible without a VPN.  The problem appears to be AIS' DNS servers.  I've looked everywhere on the router admin panel, but can't find anywhere to specify fixed ip addresses.  Is there an option there? Is it even possible?  The router model number is A622.

Thanks.

Buy your own router, one with better performance and more customizable than the AIS router.  You can get a decent one for a reasonable price these days.  You can change DNS settings etc, even set up a VPN back to your router. 

 

Plug it into the AIS router and route all your traffic through your own router. 

[bamnutsak]

On 6/23/2025 at 9:55 AM, Zaphod Priest said:

The router model number is A622

 

I am 100% confident that the ability to set Static DNS servers is possible with this router.

 

192.168.1.1

username/password/captcha

Advanced setup

Applications

DNS

 

use Google DNS servers

 

8.8.8.8

8.8.4.4

 

If you have difficulty phone AIS.

 

I've had issues with AIS as well. Even switched my Android devices to Google DNS.

 

 

[Negita43]

AIS recently installed a new Router - 3BB before. I asked for the password and was given it (and it seems to me that all their routers have the same password - very secure!!!) I changed mine and was told only access to "Basic Functions" But "I seem to be able to access "Advanced" also.

[TedG]

You can use static settings on your computer.  

[Negita43]

In case anyone is interested

 

Encrypted DNS

 

https://umatechnology.org/what-is-encrypted-dns-and-when-to-use-it/

[NetSol]

Generally in Thailand, Cloudflare DNS (1.1.1.1) is faster and more privacy oriented.
It's worth trying to set it as your Primary DNS and Google (8.8.8.8) as your secondary DNS, then see how things go.

 

For the OPs issue, if AIS blocks the site at the IP level (e.g. firewall, DPI, TCP reset), then DNS won’t matter — the traffic is stopped after resolution. 
 

To prevent that you can use Cloudflare’s DNS over HTTPS:

- On desktop: Use 1.1.1.1 resolver in DoH mode via your browser or OS

- On mobile: Install the 1.1.1.1 app (Cloudflare’s free DNS-over-HTTPS app)

 

Alternative, buy a Mikrotik Router and put it "behind" the AIS modem as the Microtik router does allow you to setup a permanent VPN.

It's a but of work though to set it all up, so an easy solution can be to subscribe to a VPN Provider.

NordVPN is one I would personally recommend.

 

Hope this helps.
 

 

 

[MadAtMatrix]

Go into the settings of your web browser and search for DNS.  Change it IN the browser (no need to do on the router) to cloudflare 1.1.1.1 and everything will become unblocked. Even CornPub works this way without needing a VPN. 

[asiacurious]

I've experienced this on a few sites and the issue may be an IP address issue, not a DNS issue.  The blocked site I'm visiting is usually blocking the IP address my router has been assigned by my ISP. 

 

It's likely that the blocked sites you're visiting are using lists of "known" problematic IP address netblock (a range of IP addresses assigned to an ISP) to set up their blocks and protect themselves from various attacks.  The IP addresses that you're being assigned by your ISP likely appear in these lists.

 

(For an example of AIS assigned netblocks, see here: https://ipinfo.io/AS133481) 

 

You can ask your ISP to try assigning you a new IP address from a different netblock. Some will do it, some won't. A tech coming out to your place to see the problem may be necessary. They can likely push a request through that you can't via a phone call (unless you get someone knowledgeable on the other end of the line).

 

Hope this helps.