How do I secure my internal DNS?

How do I secure my internal DNS?

Here are some of the most effective ways to lock down DNS servers.

1. Use DNS forwarders.
2. Use caching-only DNS servers.
3. Use DNS advertisers.
4. Use DNS resolvers.
5. Protect DNS from cache pollution.
6. Enable DDNS for secure connections only.
7. Disable zone transfers.
8. Use firewalls to control DNS access.

Which of the following issues are serious concerns for DNS security?

Today, let’s look at five common threats that leverage DNS, along with suggested best-practice, risk-mitigation strategies.

1. Typosquatting.
2. DDoS.
3. DNS Amplification Attacks.
4. Registrar Hijacking.
5. Cache poisoning.

Is a public IP address secure?

The main risk of using a public IP address is the same as the advantage: It allows anyone, anywhere to connect to your device directly from the Internet — and that includes cybercriminals. If cybercriminals want to get hold of not just anybody’s, but specifically your IP, they can do it when you use Skype, for example.

Can a public DNS server resolve a private IP address?

In theory it should work, to let a public DNS resolve your private queries – but people avoid this also because of security reasons – it makes no sense to allow everyone see what hosts you have on your internal network. In addition some security solutions don’t allow public DNS servers to answer internal systems with private IP addresses.

Is it possible for an attacker to take over your internal DNS?

You have internal service but you used public DNS to map these names to your internal IPs. an attacker could conceivably take over the external DNS to redirect traffic from your internal IP addresses to a server they control, possibly outside your internal network.

What happens if I publish my internal DNS address?

If you publish the DNS of an internal IP address on your public-facing DNS then only people on your network or on your VPN are going to be able to reach it. An external party will be able to look up web.company.com and get back 172.168.1.10 but the network they are on won’t be able to route traffic to that server.

What should I do if my DNS server is not working?

If one DNS server runs into an issue, the other one takes over immediately. Admins configure machines to use secondary DNS automatically if the primary is not responsive. An IP of an internal DNS server can be any address within a private network IP range. By making DNS servers redundant, you can achieve high availability of the DNS infrastructure.