Free what is dns software for linux

KpassDNS will help you to define bookmarks in hosts file and speed up your connection while connecting these websites.

Also using KpassDNS, you can bypass DNS level censor. If you define website and IP with KpassDNS, DNS level censor cant stop you.

tinydyndns is a simple but powerful dynamic DNS solution that uses djbdns. tinydyndns cooperates with the djbdns package to publish dynamic IP addresses authenticated through POP connections.

On successfully authenticated POP connections, the tinydyndns-update program manipulates tinydns constant database "data.cdb" directly without rebuilding it; this makes the dynamic DNS solution use very few system resources.

Using a POP service for authentication saves the work for installing special client software, since POP clients are available for every common network-aware operating system. To provide the DNS and POP service, tinydyndns cooperates with djbdns, qmail, and cvm.

Posadis is a powerful Domain Name Server for various platforms. It is supporting both authoritative DNS and caching functionality, which is available for different operating systems, including Mac OS X, Windows, and many Unix variants such as Linux and FreeBSD.
Main features:
- Caching and forwarding
- Primary DNS
- Secondary DNS
- Monitoring of zone files
- DNS Notify support
- DNS Update support (new in 0.70)
- Command-line tools
Enhancements:
- Removed "mc", "mc2" debugging messages
- Fixed "error: posadisrc:55: posadisrc:55: foo"-type messages
- Fix for "Line should not begin with whitespace" parser error
- Fix for Win32 service taking too long to stop
- Fixed bug where zone transfers would leave the TCP connection open
- Do not use Posadis thread system in signal handlers (could theoretically be harmful)
- Fix an occasion where Posadis could potentially flood itself with queries when resolving (depending on the underlying thread system)
- Added support for dumping the cache to file
- Added support for loading NXDOMAIN/NODATA information, and cached (as opposed to static) data from initial cache files
- Added option cache_to_file to load from file on startup and save to file on exit
- Default plugin dir works again now
- Fixed /really/ insignifficant error in serial number arithmetic code
- Fixed memory leak in dynamic zone lookup (not currently used)

Net::DNS::RR::A is a DNS A resource record. Net::DNS is a DNS resolver implemented in Perl. It allows the
programmer to perform nearly any type of DNS query from a Perl script. For details and examples, please read the Net::DNS manual page.

To read about the latest features, see the Changes file. To find out about known bugs and to see whats planned for future versions, see the TODO file.

Net::DNS does not depend on any C libraries. However, if possible Net::DNS tries to link against a C-library that is supplied with the code. This provides a notable speed increase.

The author invites feedback on Net::DNS. If theres something youd like to have added, please let me know. If you find a bug, please send me the information described in the BUGS section below.

METHODS

address

print "address = ", $rr->address, "n";

Returns the RRs address field.

MaraDNS is a package that implements the Domain Name Service (DNS), an essential internet service.
MaraDNS is intended for environments where a DNS server must be secure and where the server must use the absolute minimum number of resources possible.
MaraDNS was created in response to issues people had with the DNS servers available in early 2001; and has the following design goals:
- Security-aware programming. A DNS server needs to be secure. I have a number of security features in the code, including:
1. The code uses a special string library which is resistant to buffer overflows.
2. The code, if started as root, mandates running as an unprivledged user in a chroot() jail.
- Open-Source. The 1.0 release of the DNS server is public-domain code; the next release will be released under a very liberal BSD-style license.
- Simplicity. This DNS server has the minimum number of features needed to correctly act as an authoritative and/or recursive name server.
Enhancements:
- The AES variant that MaraDNS uses has been hardened against some cache timing attacks that cryptographers have recently published.

DNSA and DNSA-NG are swiss knife tools for Linux designed to test several DNS security issues.

The most important one is a full wifi support using 2 cards:

- The first in monitor mode which capture 802.11 traffic
- The second associated to the AP and injecting DNS forged packets

Host-ap and madwifi drivers are already supported by DNSA-NG.

DNSA was initially thought because of a lack in DNS auditing tools. It uses libnet and libpcap :

"Libnet is a high-level API (toolkit) allowing the application programmer to construct and inject network packets. It provides a portable and simplified interface for low-level network packet shaping, handling and injection. Libnet hides much of the tedium of packet creation from the application programmer such as multiplexing, buffer management, arcane packet header information, byte-ordering, OS-dependent issues, and much more.

Libnet features portable packet creation interfaces at the IP layer and link layer, as well as a host of supplementary and complementary functionality. Using libnet, quick and simple packet assembly applications can be whipped up with little effort. With a bit more time, more complex programs can be written (Traceroute and ping were easily rewritten using libnet and libpcap).

Usage :

Usage: ./dnsa [ARGS]
DNS Swiss knife tool

-1 DNS ID spoofing [ Required : -S ]
-D [www.domain.org] Hostname query to fool. Dont use it if every DNS request sniffed has to be spoofed
-S [IP] IP address to send for dns queries
-s [IP] IP address of the host to fool
-i [interface] IP address to send for dns queries
-2 DNS IDs Sniffing [ Required : -s ]
-s [IP] IP address of the server which makes queries
-w [file] Output file for DNS IDs
-3 DNS cache poisoning [ Required : -S AND -b AND -a ]
-a [host.domain.org] Hostname to send in the additional record
-b [IP] IP to send in the additional record
-D [www.domain.org] Hostname for query. Use it if you want to fool just on
-S [IP] IP address to send for DNS queries (the normal one)
-s [IP] IP address of the server to fool
-i [interface] IP address to send for DNS queries

Satellite can track many remote machines with dynamic IP addresses in situations where public DNS services are inappropriate. Satellite can log and alert an admin immediately when a site comes online or needs attention.
The Satellite archive also includes an RPM spec file. RPM users can build a binary package ready to install by running:
rpm -tb satellite-1.0.2.tar.gz
You will find the binary rpm under /usr/src/rpm/RPMS/i386 or /usr/src/redhat/RPMS/i386.
Reasons for Satellite
Public DNS services are often used to track clients with changing IP addresses, but DNS solutions suffer from several problems:
Failure
Public DNS servers regularly fail due to overloading and system administration problems.
No notification
There is no notification when a system goes online. Instead you must poll DNS regularly to see when a system comes online.
Latency
Updating can take from several minutes to several hours before the change is made public. On systems with small idle timeouts it is often impossible to find the current IP address via DNS.
No history
Public DNS services only keep track of the current address and dont record past times or changes in a central location.
Enhancements:
- Minor code improvements. -e no longer searches PATH.
- --with-port removed. Default now found from /etc/services.
- Documentation updates

DHCP-DNS update DNS servers according to DHCP requests.

This version is an upgrade of the real v0.52 version. It only includes support for servers that manage several domains (multiple domain name). It is no longer a need to tell the name of the domain the DNS server administrates.

One just tells the path to your dhcpd.conf file and the perl script manages alone to find the domain names (option domain-name).

A problem could occur when puting a host from a LAN to another. This problem does not come from the perl script, but from the DHCP server: in old DHCP servers, the implementation does not totally respect the RFC2131 that specifies that to release a lease, the client must provide its UID and its current IP address.

Older DHCP servers were releasing leases only according to UIDs, and were investigating IP addresses only if no lease for the UID had been found. This problem is solved since the version 2.0pl2.

However, it is very easy to patch an old server to make it compliant, and thats what has been done in the version 2.0b1pl6 version available on this site.