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--- software:dns [2014/10/18 01:30] – [DNS servers] superwizard
+++ software:dns [2019/09/10 23:19] (current) – [Check DNS settings] superwizard
@@ Line 1: / Line 1: @@
 ====== Check DNS settings ======
+You can use a tool called named- checkconf to check BIND dns server
     named-checkconf /etc/named.conf
     named-checkzone (needs parameters)
+    curl http://w3.org/ --trace-ascii /dev/stdout
+From: https://www.cyberciti.biz/tips/howto-linux-unix-check-dns-file-errors.html
+Or
+look at /etc/resolve.conf
 ====== Benchmark dns ======
@@ Line 9: / Line 20: @@
 ====== DNS servers ======
+=== Unbound ===
+From: https://unbound.net/
+<code>
+Unbound is a validating, recursive, and caching DNS resolver.
+On pfSense 2.2, Unbound has been integrated into the base system. Unbound is also the default
+DNS Resolver for new installations.
+</code>
+From: https://doc.pfsense.org/index.php/Unbound_DNS_Resolver
+<code>
+Unbound is a validating, recursive, and caching DNS resolver.
+The C implementation of Unbound is developed and maintained by NLnet Labs. It is based on ideas
+and algorithms taken from a java prototype developed by Verisign labs, Nominet, Kirei and ep.net.
+Unbound is designed as a set of modular components, so that also DNSSEC (secure DNS) validation and
+stub-resolvers (that do not run as a server, but are linked into an application) are easily possible.
+The source code is under a BSD License.
+</code>
 === PowerDNS ===
@@ Line 14: / Line 50: @@
 From: https://www.powerdns.com/downloads.html
-   Both the PowerDNS Authoritative and the PowerDNS Recursive Servers are available in source form, as well
+<code>
-   as installable Linux Packages. PowerDNS is shipped with many Linux and UNIX distributions, including Debian,
+Both the PowerDNS Authoritative and the PowerDNS Recursive Servers are available in source form,
-   FreeBSD, Gentoo, NetBSD, SUSE and Ubuntu.
+as well as installable Linux Packages. PowerDNS is shipped with many Linux and UNIX distributions,
-   Users of these distributions may find they already have a copy of PowerDNS available, often in the package
+including Debian, FreeBSD, Gentoo, NetBSD, SUSE and Ubuntu.
-   called pdns, powerdns-server, pdns-recursor or pdns-server.
+Users of these distributions may find they already have a copy of PowerDNS available, often in
+the package called pdns, powerdns-server, pdns-recursor or pdns-server.
+</code>
 === Bind ===
@@ Line 34: / Line 72: @@
     file "/etc/bind/zones/rev.0.168.192.in-addr.arpa";
     };
+Also: for OpenSuse 11.1
+   the default file location zone files is "/var/lib/named"
+=== Dual DHCP DNS Server ===
+From: http://dhcp-dns-server.sourceforge.net/
+    DHCP Server allots the IP addresses to computers, while DNS server resolves them.
+    You need DHCP Server if you do not want to manually maintain IP Addresses or you have less IP
+    Addresses than number of machines you have, as dynamic DHCP Server will recycle IP Addresses on
+    machines.
+    DNS Server is needed for resolving hostnames to their IP addresses. Normally your ISP will provide you
+    with DNS Service. You may have your own DNS Server, which will resolve hostnames by forwarding them to
+    ISP's DNS Server and cache the addresses also.
+    If you have home/small office network with Unix/Linux machines, these machines will not be resolved from
+    each other, as Unix/Linux machines do not support NBNS protocol and you need your own DNS Server. But how
+     about resolving your local machines ?. Your ISP's DNS Server will not have this list and your own DNS
+     Server wont have them either. Most DNS Servers cannot do this.(unless you configure dynamic updates, or
+     use static IP addresses and manually enter them).
 ====== DNS at the local area network level ======