How to Configure dnsmasq on CentOS 7

1. What is Dnsmasq in Centos?
2. Where is Dnsmasq config?
3. What is Dnsmasq in Linux?
4. Is Dnsmasq a DNS server?
5. How do I kill Dnsmasq?
6. How do I check if Dnsmasq is running?
7. Is Dnsmasq safe?
8. How do I view Dnsmasq cache?
9. How do I start Dnsmasq server?
10. Is Dnsmasq caching?
11. What is Systemd resolv?
12. Does Dnsmasq use resolv conf?

What is Dnsmasq in Centos?

A Dynamic Host Configuration Protocol (DHCP) server dynamically assigns IP addresses and other network configuration parameters to each device on a network. ... dnsmasq is a lightweight, easy to configure DNS forwarder, DHCP server software and router advertisement subsystem for small networks.

Where is Dnsmasq config?

Configuration Files

Dnsmasq is configured in /etc/dnsmasq. conf . Your Linux distribution may also use /etc/default/dnsmasq , /etc/dnsmasq. d/ , and /etc/dnsmasq.

What is Dnsmasq in Linux?

Dnsmasq is a lightweight, easy to configure, DNS forwarder and DHCP server. It is designed to provide DNS and optionally, DHCP, to a small network. ... Dnsmasq supports static and dynamic DHCP leases and BOOTP/TFTP for network booting of diskless machines (source: from the package description).

Is Dnsmasq a DNS server?

dnsmasq is free software providing Domain Name System (DNS) caching, a Dynamic Host Configuration Protocol (DHCP) server, router advertisement and network boot features, intended for small computer networks.

How do I kill Dnsmasq?

Comment out dns=dnsmasq in /etc/NetworkManager/NetworkManager. conf. Stop Dnsmasq with sudo killall -9 dnsmasq.

How do I check if Dnsmasq is running?

Dnsmasq troubleshooting

1. See if dnsmasq is running with ps guax | grep dnsmasq. ...
2. Check the dnsmasq configuration files in /etc/dnsmasq.d. ...
3. There should be some settings in them and they should not mentioned that a service (DNS or DHCP) is not enabled.
4. In the DNS file, there should be two server lines, with an IP, like this: server=208.67.222.222.

Is Dnsmasq safe?

Google Security researchers identified seven vulnerabilities that can allow a remote attacker to execute code on, leak information from, or crash a device running a Dnsmasq version earlier than 2.78, if configured with certain options.
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How do I view Dnsmasq cache?

To display the contents of the DNS resolver cache:

1. Type ipconfig /displaydns and press Enter.
2. Observe the contents of the DNS resolver cache. It is generally not necessary to view the contents of the DNS resolver cache, but this activity may be performed as a name resolution troubleshooting method.

How do I start Dnsmasq server?

For those new to Dnsmasq, Dnsmasq is a simple, lightweight, easy to use and manage DNS server with support for Lua scripting, IPv6, DNSSEC, network booting for PXE, BOOTP, and TFTP.
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1. Step 1: Install Dnsmasq on Ubuntu 20.04|18.04. ...
2. Step 2: Adding DNS records to Dnsmasq. ...
3. Step 3: Testing Dnsmasq DNS functionality.

Is Dnsmasq caching?

Dnsmasq is a lightweight DHCP and DNS caching nameserver. Unlike BIND, dnsmasq is incredibly simple to get up and running. The benefits of adding this will be quite obvious (like your DNS queries getting dramatically faster).

What is Systemd resolv?

systemd-resolved is a system service that provides network name resolution to local applications. It implements a caching and validating DNS/DNSSEC stub resolver, as well as an LLMNR and MulticastDNS resolver and responder. ... The native, fully-featured API systemd-resolved exposes on the bus, see org. freedesktop.

Does Dnsmasq use resolv conf?

conf points to 127.0. 0.1, dnsmasq will actually just use the other resolv. conf file and leave /etc/resolv.