What is dnsmasq for DHCP?

What is dnsmasq for DHCP?

dnsmasq is a lightweight and simple program which enables issuing DHCP addresses on your network and registering the hostname & IP address in DNS. This configuration also allows external resolution, so your whole network will be able to speak to itself and find external sites too.

What is DNS and dnsmasq?

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. dnsmasq. Developer(s) Simon Kelley. Initial release.

What is domain name system and explain what is DNS cache poisoning?

Domain Name System (DNS) poisoning and spoofing are types of cyberattack that exploit DNS server vulnerabilities to divert traffic away from legitimate servers towards fake ones. Once you’ve traveled to a fraudulent page, you may be puzzled on how to resolve it — despite being the only one who can.

What is resolv dnsmasq?

Dnsmasq is a simple DNS forwarder. It proxies multiple upstream DNS servers, add caching, and can even serve up A records from an /etc/hosts -style configuration file. Dnsmasq is configured by giving it an /etc/resolv. conf -style file with a list of nameservers.

How long does Dnsmasq cache?

A. By default, Windows stores positive responses in the DNS cache for 86,400 seconds (i.e., 1 day) and stores negative responses for 300 seconds (5 minutes).

What is the difference between DNS poisoning and DNS hijacking?

Most of the time, DNS spoofing or cache poisoning just involves overwriting your local DNS cache values with fake ones so you can be redirected to a malicious website. On the other hand, DNS hijacking (also known as DNS redirection) often involves malware infections in order to hijack this important system service.

Where does dnsmasq store its cache?

By default, dnsmasq saves the original resolv. conf file in ‘/run/dnsmasq/resolv. conf’.

How do I use the address option in Dnsmasq?

In dnsmasq, use the address option. Specify an IP address to return for any host in the given domains. Queries in the domains are never forwarded and always replied to with the specified IP address which may be IPv4 or IPv6.

What VLAN should I set Dnsmasq to for address=?

A copy of the dnsmasq manual for address= is below. However, even if it may seem reasonable to set -i vlan (to the expected interface to be used) and -a 10.6.66.1 (to the address in which it is expected that dnsmasq will listen for DNS resolution).

How is access control implemented by Dnsmasq?

Access control (–interface, –except-interface, –listen-address, etc) is implemented by dnsmasq: it queries the kernel to determine the interface on which a packet was received and the address to which it was sent, and applies the configured rules. Wildcard mode is the default if neither of the other modes are specified.

What are the three modes of dnsmasq?

The three modes are “wildcard”, “bind-interfaces” and “bind-dynamic”. In “wildcard” mode, dnsmasq binds the wildcard IP address (0.0.0.0 or ::). This allows it to receive all the packets sent to the server on the relevant port.