The security of the routers that users buy is almost non-existent. Attackers take advantage of low-quality routers and attack vulnerable devices.
See how you can check if router you have been violated.
Buying a home router is a lot like buying an Android smartphone. Manufacturers produce a large number of different devices and do not update their software, leaving them open to attack.
How can it be violated router your
Attackers often try to change the DNS server configuration to router by adding malicious DNS servers.
So when you try to connect to a site - for example, your bank - the malicious DNS server takes you to a phishing site. The address may say nbg.gr, but you will be on a phishing site.
Malicious DNS server does not necessarily answer all queries. It may not respond to most requests or redirect them to your ISP's default DNS server. Slow DNS requests are a sign that you may have been hacked.
You may notice that a phishing site does not have HTTPS encryption, but there are many who will not notice. SSL-stripping attacks can also remove encryption when transferring data.
They can "catch" requests for Google Analytics or other scripts from almost any website and redirect them to a server through another script that serves ads or whatever. If you see pornographic ads on a page that is not used to it like iguru, it is almost certain that there is something in router on your own computer.
Some routers may have the Remote Management UI enabled along with default usernames and passwords. There are bots that scan automatically for these routers.
How to check it
The only indicative sign that one router has been violated if his DNS server has changed. Open your router's web UI to check the DNS server configuration.
This page exists under a local IP, and to find it you need to search the internet, or the user manual. Enter the name of the manufacturer and his model on the internet router you use and search for the login URL.
Sign in with your router's username and password (usually on a sticker at the bottom router. Search for "DNS" configuration. You will usually find it in the WAN or Internet connection settings screen. If set to "Automatic", that's fine - it gets the IP from your ISP. If it is set to "Manual" and there are custom DNS servers, it may be a problem if you do not have them installed.
No problem if you have set up your router to use alternate DNS servers - for example 184.108.40.206 and 220.127.116.11 for Google DNS, 18.104.22.168 and 22.214.171.124 for OpenDNS and 126.96.36.199 for Cloudflare.
However, if there are DNS servers that you do not recognize, it means that some malware has changed its settings. router to use its own DNS servers. If in doubt, search the web for these IPS and see if they are safe or not. Something like "0.0.0.0" is good and often means that the field is empty and the router automatically receives a DNS server.
Help, there is a malicious DNS server!
If you find a malicious DNS server, you can turn it off and "tell" router to use the DNS server from your ISP or to pass the above legitimate DNS server addresses.
You may want to delete all your router settings and reset them to factory defaults. Then use the following settings to protect router you from upcoming attacks.
Its settings router your
You can definitely set it up router against these attacks, but if the router has security vulnerabilities that have not been fixed by the manufacturer, there is nothing you can do about it.
- Install firmware updates (firmware): Make sure the latest firmware for your router is installed. Turn on automatic software updates if it has the router your. Unfortunately, most do not.
- Disable remote access: Disable remote access to admin pages.
- Change the password: Change the password so that attackers can not enter with the default.
- Disable UPnP: UPnP was and is particularly vulnerable. Even if UPnP is not vulnerable to router Your malware running somewhere in your local network can use UPnP to change the DNS server. This is how UPnP works - it trusts all requests coming from your local network.
DNSSEC is supposed to provide additional security, but it is not yet available. In the real world, every client trusts the configured DNS server. The malicious DNS server could claim that a DNS record does not have DNSSEC information and that the IP address being transmitted is real.