Powerdns metrics

How does PowerDNS work?

By default, PowerDNS uses 'Packet Cache' to identify similar queries and then provides related answers respectively. It does this without any further processing of the request. The default cache interval is based on the TTL (time to live) setting for PowerDNS, which is 20 seconds.

What is the default TTL for PowerDNS?

The default time to live is 20 seconds and can be changed by setting cache-ttl .

What is PowerDNS Recursor?

The PowerDNS Recursor is a high-performance DNS recursor with built-in scripting capabilities. It is known to power the resolving needs of over 150 million internet connections. The documentation is only for the 4.1 and higher series, users of older versions are urged to read End of life statements and upgrade!

What is the difference between BIND and PowerDNS?

PowerDNS uses the pdns_control utility to control the nameserver functions, while BIND/named uses rndc to administer these functions. PowerDNS does not provide a recursive/caching nameserver and thus requires external nameservers in the resolv. conf file, while BIND/named does provide a recursive/caching nameserver.

Does PowerDNS use BIND?

Whatever the reason, PowerDNS has an easy way for you to use your existing BIND master zone configuration files to configure your PowerDNS server.

What is a good TTL number?

Generally, we recommend a TTL of 24 hours (86,400 seconds). However, if you are planning to make DNS changes, you should lower the TTL to 5 minutes (300 seconds) at least 24 hours in advance of making the changes. After the changes are made, increase the TTL back to 24 hours.

Why is my TTL 128?

By default, in Windows and many other OS's, the TTL will be 128 — that means that after a packet passes through 128 routers, if it hasn't reached it's final destination yet, the packet will expire and will be removed from the network.

What is TTL 3600?

With a TTL of 3600 seconds, or 1 hour, that means that as a recursive server learns about example.com, it will store that information about the A-record at example.com for one hour.

What is the difference between authoritative and recursive DNS?

Authoritative DNS servers are the authority on DNS records and store DNS record information while recursive DNS servers interact directly with the end user. The recursive DNS server reads a user's DNS request and either uses cached data to respond or attempts to discover the answer and then respond.

Is root DNS recursive?

What is a DNS root nameserver? The 13 DNS root nameservers are known to every recursive resolver, and they are the first stop in a recursive resolver's quest for DNS records.

What is nsd DNS?

In Internet computing, NSD (for "name server daemon") is an open-source Domain Name System (DNS) server. It was developed by NLnet Labs of Amsterdam in cooperation with the RIPE NCC, from scratch as an authoritative name server (i.e., not implementing the recursive caching function by design).

Does PowerDNS have a GUI?

Poweradmin is an open source, friendly, and easy-to-use web GUI for PowerDNS that supports key features. With this feature-rich web application, you will be managing your DNS environment in no time flat.

What is the default user for PowerDNS?

The username is admin and the password is the Poweradmin administrator password from the Installation step 3. Click the Add Master Zone link. Enter the domain name in the Zone name field. This domain should be one that for which you want to host a zone file.

Is BIND the best DNS server?

Advantages of BIND

BIND enjoys several important advantages, which make it by far the most popular DNS server on the Internet: Broad usage and strong community - BIND is a de facto standard for DNS in Linux systems, and is actively supported by a large open source community.

Is BIND still used?

BIND (Berkeley Internet Name Domain) is an open source solution for DNS which is still commonly used to manage network infrastructure on enterprises around the world.

Why should I use Unbound DNS?

Unbound is feature-rich with DNS Security with its harden-glue, access control, max randomness for query ID and ports, response scrubbing, case preservation, and Denial of Service or DoS protection features. These are just some of the features that make Unbound one of the most secure DNS server implementations.

How does OpenDNS make money?

Individuals and companies sign up for the free OpenDNS service, and it handles their DNS queries for them. OpenDNS makes money by selling advertising on its redirection service.

How does mDNS discovery work?

When an mDNS client needs to resolve a hostname, it sends an IP multicast query message that asks the host having that name to identify itself. That target machine then multicasts a message that includes its IP address. All machines in that subnet can then use that information to update their mDNS caches.

How does a smart DNS work?

Smart DNS service replaces the DNS address provided by your ISP with one for a different DNS server. The location depends on the server infrastructure of the provider. In this way, Smart DNS lets you access geo-blocked content because the website thinks that you are in a different location.

Does Flushdns do anything?

What does flush DNS do? Flushing DNS will clear any IP addresses or other DNS records from your cache. This can help resolve security, internet connectivity, and other issues.

Is OpenDNS owned by Cisco?

SAN JOSE, Calif., Aug. 27, 2015 – Cisco (NASDAQ: CSCO) today announced it has completed the acquisition of OpenDNS, a privately held company that provides advanced threat protection for any device, anywhere, anytime.

Is OpenDNS faster than CloudFlare?

CloudFlare is a well-known internet security company and CDN provider, and today it announced its own public DNS service. According to the company, the service is faster than both Google DNS and OpenDNS.

Is OpenDNS better than Google?

OpenDNS offers many more additional bells and whistles over the barebone functionalities of google DNS. For example, if you create a free account with OpenDNS, you will update your IP address with their DNS server and then create your own custom blacklist/whitelist of websites.

Is SmartDNS faster than VPN?

Is smart DNS faster than a VPN? Yes, because a smart DNS only changes your DNS address while a VPN encrypts data traffic, obfuscates it, and spoofs your location by changing your IP – effectively taking up more of your internet bandwidth.

Is SmartDNS better than VPN?

Online protection: A Smart DNS doesn't protect your online activities. On the other hand, a VPN uses encryptions and ensures a secure connection over the internet. A VPN takes care of your online privacy and security. Speed: unlike a VPN, a Smart DNS doesn't have encryption overheads.

How do hackers use DNS?

Attackers can take over a router and overwrite DNS settings, affecting all users connected to that router. Man in the middle DNS attacks — attackers intercept communication between a user and a DNS server, and provide different destination IP addresses pointing to malicious sites.

How often should you flush DNS?

If you need clear DNS cache from client side for every 15 minutes, it is OK. After these caches were cleared, if needed, the client will re-query these records from DNS server.

Does Flushing DNS change your IP address?

If you flush the cache, all remembered IP addresses are erased. The next time you visit google, your computer will use DNS to look up the IP address and store it in cache.

Does flush DNS improve Ping?

What this does is clear out space or stored dns data like internet website addresses and sometimes that data gets corrupted it likely also stores dns data from servers too and having this cleared out will help with stability or even increases latency potential as this will allow for more Latency stability.