Free dns tools software for linux

dnsutl package is a collection tools to make administering DNS easier. These include:
dns-rev
Take the forward DNS mapping and generate the reverse mapping. This is useful for producing a self-consistent DNS configuration.
dns-ethers
By using a bogus record type, you can keep the MAC address with the IP address, and generate the /etc/ethers file.
dns-hosts
Take the forward DNS mapping and generate the /etc/hosts file.
dns-bootp
Using the MAC and IP information, you can generate the /etc/bootptab file.
dns-ng
Take the forward DNS mapping and generate the /etc/netgroup file.
dns- bootparams
Using the MAC and IP information, you can generate the Sun /etc/bootparams file.
dns-boot- check
Check your named(8) configuration for self- consistency.
dns-hosts-import
Turn your /etc/hosts file into a DNS forward map, as a first step to configuring your DNS server.
dns-dhcp
Using the MAC and IP information, you can generate the /etc/dhcp.conf file.
All of these programs are both faster than shell scripts, and more robust when faced with all the peculiar semantics of DNS resource files. They even understand the $include directive.
dnsutl runs on almost any flavor of UNIX. The source distribution is self configuring using a GNU Autoconf generated configure script.
Enhancements:
- A bug has been fixed in the SRRF parser, so it more closely follows RFC 1035.
- A bug has been fixed in the name server (ns) record validation.

Net::DNS::ToolKit are tools for working with DNS packets.

SYNOPSIS

use Net::DNS::ToolKit qw(

get1char
get16
get32
put1char
put16
put32
getIPv4
putIPv4
putIPv6
getIPv6
getstring
putstring
dn_comp
dn_expand
parse_char
gethead
newhead
getflags
get_qdcount
get_ancount
get_nscount
get_arcount
put_qdcount
put_ancount
put_nscount
put_arcount
inet_aton
inet_ntoa
ipv6_aton
ipv6_n2x
ipv6_n2d
sec2time
ttlAlpha2Num
collapse
strip
get_ns
gettimeofday
);

$char = get1char($buffer,$offset);
($int, $newoff) = get16($buffer,$offset);
($long, $newoff) = get32($buffer,$offset);
$newoff = put1char($buffer,$offset,$u_char);
$newoff = put16($buffer,$offset,$int);
$newoff = put32($buffer,$offset,$long);
$flags = getflags($buffer);
$int = get_qdcount($buffer);
$int = get_ancount($buffer);
$int = get_nscount($buffer);
$int = get_arcount($buffer);
$newoff = put_qdcount($buffer,$int);
$newoff = put_ancount($buffer,$int);
$newoff = put_nscount($buffer,$int);
$newoff = put_arcount($buffer,$int);
($netaddr,$newoff)=getIPv4($buffer,$offset);
$newoff = putIPv4($buffer,$offset,$netaddr);
($ipv6addr,$newoff)=getIPv6($buffer,$offset);
$newoff = putIPv6($buffer,$offset,$ipv6addr);
($offset,
$id,$qr,$opcode,$aa,$tc,$rd,$ra,$mbz,$ad,$cd,$rcode,
$qdcount,$ancount,$nscount,$arcount)
= gethead($buffer);
$newoff = newhead($buffer,$id,$flags,
$qdcount,$ancount,$nscount,$arcount);
($b,$h,$d,$a)=parse_char($char);
($newoff,$name) = dn_expand($buffer,$offset);
($newoff,@dnptrs)=dn_comp($buffer,$offset,$name,@dnptrs);
$dotquad = inet_ntoa($netaddr);
$netaddr = inet_aton($dotquad);
$ipv6addr = ipv6_aton($ipv6_text);
$hex_text = ipv6_n2x($ipv6addr);
$dec_text = ipv6_n2d($ipv6addr);
$timetxt = sec2time($seconds);
$seconds = ttlAlpha2Num($timetext);
$shorthost = collapse($zonename,$longhost);
$tag = strip($P_tag);
@nameservers = get_ns();
($secs,$usecs) = gettimeofday();

Routines to pick apart, examine and put together DNS packets. They can be used for diagnostic purposes or as building blocks for DNS applications such as DNS servers and clients or to allow user applications to interact directly with remote DNS servers.

"mdnsd" is a very lightweight, simple, portable, and easy to integrate open source implementation of Multicast DNS (part of Zeroconf, also called Rendezvous by Apple) for developers. It supports both acting as a Query and a Responder, allowing any software to participate fully on the .localnetwork just by including a few files and calling a few functions. All of the complexity of handling the Multicast DNS retransmit timing, duplicate
suppression, probing, conflict detection, and other facets of the DNS protocol is hidden behind a very simple and very easy to use interface, described in the header file. The single small c source file has almost no dependencies, and is portable to almost any embedded platform. Multiple example applications and usages are included in the download, including a simple very persistent query browser and a tool to advertise local web sites.


The code is licensed under both the GPL and BSD licenses, for use in any free software or commercial application. If there is a licensing need not covered by either of those, alternative licensing is available upon request.

DNS.py script provides a robust and flexible DNS client implementation.

MyDNS is a free DNS server for UNIX. It was implemented from scratch and is designed to serve records directly from an SQL database (currently either MySQL or PostgreSQL).
Its primary objectives are stability, security, interoperability, and speed, though not necessarily in that order.
MyDNS does not include recursive name service, nor a resolver library. It is primarily designed for organizations with many zones and/or resource records who desire the ability to perform real-time dynamic updates on their DNS data via MySQL.
MyDNS starts and is ready to answer questions immediately, no matter how much DNS data you have in the database. It is very fast and memory-efficient. It includes complete documentation, including a manual and a FAQ.
MyDNS supports a few frills, including round robin DNS, dynamic load balancing, and outgoing AXFR for non-MyDNS nameservers.
MyDNS is licensed under the GNU General Public License
Enhancements:
- Changed PostgreSQL connect error message code. It will still try the Unix domain socket (not sure why I did that) but if all fails, it outputs the first error message, which is much more likely to make sense.
- Implemented David Phillips AIX patch.
- Implemented Petter Larssons ALIAS patches for mydnscheck and mydnsexport.
- Made sure all copyright notices included 2004.
- Fixed "undefined constant" and other strict error message stuff in contrib/admin.php.
- Fixed reference to "rr" (table name) in contrib/admin.php -- replaced with $rr_table_name.
Thanks to Harald Paulsen for finding this.

dnsreflector daemon listens for DNS queries on a local UDP port and answers with records pointing back to localhost. Combined with OpenBSDs packet filter pf(4) this works as a bandwidth efficient spamtrap.

dnsreflector was written and tested with OpenBSD. If you are interested in running dnsreflector on another platform, please contact me .

PF Setup

table < spamd > persist
rdr inet proto udp from < spamd > to any port 53 -> 127.0.0.1 port 53000

Usage

dnsreflector [-d] [-a address] [-p port]

-d Run as daemon in the background
-a address Bind to this address (default: 127.0.0.1)
-p port Bind to this port (default: 53000)

Linux: On popular demand I made a diff to compile dnsreflector with Linux (tested on SuSE). You will need a facility to redirect DNS queries coming from blacklisted hosts to dnsreflector. I dont know how to do this with Linux netfilter, but if you do, please tell me.

DynDNS was originally founded to provide quality dynamic DNS services to the Internet and we continue to offer our free Dynamic DNS. In addition, we offer other services that might be of interest to a home user.
DynDNS is a focused and savvy DNS provider, specializing in dynamic DNS and complementary services. DynDNS is a private, internally funded and stable company.
We have no investors looking over our shoulders nor do we worry about our stock value. We run an efficient and profitable organization and pass these savings on to our customers. We are technologists that develop high quality services and our goal is to be the value provider of DNS services.
The free Dynamic DNS service allows you to alias a dynamic IP address to a static hostname in any of the many domains we offer, allowing your computer to be more easily accessed from various locations on the Internet. We provide this service, for up to five (5) hostnames, free to the Internet community.
The Dynamic DNS service is ideal for a home website, file server, or just to keep a pointer back to your home PC so you can access those important documents while youre at work.
Using one of the available third-party update clients you can keep your hostname always pointing to your IP address, no matter how often your ISP changes it. No more fumbling to find that piece of paper where you wrote down your IP address, or e-mailing all your friends every time it changes. Just tell them to visit yourname.dyndns.org instead!
Main features:
- Hostnames in 68 domains
- Wildcarding, allowing *.yourhost.dyndns.org to point to yourhost.dyndns.org
- Offline URL redirection
- MX records, allowing for flexible e-mail configurations
- Clients for a wide variety of platforms
- An open, non-proprietary update interface
- Almost instantaneous DNS propagation time
- Free, industry leading e-mail support
- 5 DNS servers in 4 redundant tier-1 datacenters around the globe
Enhancements:
- support for olitec-SX200
- added sample-etc_rc.d_init.d_ddclient.lsb as a sample script for lsb-compliant systems.
- support for linksys wrt854g (thanks to Nick Triantos)
- support for linksys ver 3
- support for Thomson (Alcatel) SpeedTouch 510 (thanks to Aldoir)
- Cosmetic fixes submitted by John Owens