Free dns flush software for linux

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

ddnsu provides a small dynamic DNS client.
ddnsu is a "small" dynamic dns updating tool. its intended use is to perform an update to a particular online dynamic dns service, and to have a very small file size so it can be used in embedded environments.
to make this useful you need a separate app which checks when the IP address of an interface has changed.
a dynamically-linked glibc binary is ~17kB, so it fits easily into systems which dont have a full install of perl or unnecessary libraries.
Enhancements:
- This release adds improved logging and syslog support and SSL support.
- The binary size without the new features is essentially the same.

DNS Flood Detector was developed to detect abusive usage levels on high traffic nameservers and to enable quick response in halting (among other things) the use of ones nameserver to facilitate spam.
DNS Flood Detector uses libpcap (in non-promiscuous mode) to monitor incoming dns queries to a nameserver. The tool may be run in one of two modes, either daemon mode or "bindsnap" mode. In daemon mode, DNS Flood Detector will alarm via syslog.
In bindsnap mode, the user is able to get near-real-time stats on usage to aid in more detailed troubleshooting.
Usage: ./dns_flood_detector [OPTION]
-i ifname specify interface to listen on (default lets pcap pick)
-t n alarm when more than n queries per second are observed
(default 40)
-a n wait for n seconds before alarming again on same source
(default 90)
-w n calculate statistics every n seconds
(default 10)
-x n use n buckets
(default 50)
-m n mark overall query rate every n seconds
(default disabled)
-A addr filter for specific address
-M mask netmask for filter (in conjunction with -A)
-Q monitor any addresses (default is to filter only for
primary addresses on chosen interface)
-b run in foreground in "bindsnap" mode
-d run in background in "daemon" mode
-D dump dns packets (implies -b)
-v detailed information (use twice for more detail)
-h usage info
Sample Output:
dopacki:~$ sudo ./dns_flood_detector -v -v -b -t10
[15:14:56] source [192.168.1.45] - 0 qps tcp : 24 qps udp [8 qps A] [16 qps PTR]
[15:14:56] source [10.0.24.2] - 0 qps tcp : 15 qps udp [15 qps A]
[15:15:06] source [192.168.1.45] - 0 qps tcp : 24 qps udp [8 qps A] [16 qps PTR]
[15:15:06] source [10.0.24.2] - 0 qps tcp : 15 qps udp [14 qps A]
[15:15:16] source [192.168.1.45] - 0 qps tcp : 23 qps udp [7 qps A] [15 qps PTR]
Enhancements:
- Address filtering options are now available, as are fractional query rates for better precision.
- This update also fixes several crashes and segfaults that affected overall reliability.

Blahz-DNS is PHP/MySQL based DNS (BIND 9/tinydns) administration with support for primary and secondary zones, user authentication, User and Admin account types (with read-only versions), and restricted access for user accounts to certain primary and secondary zones.
Enhancements:
Bugfixes:
- Search and replace now places updated zones into the updated table
Additions:
- Added import functionality. Will allow you to import zone files
- This is done by performing a dig @< dnsserver > < domain > AXFR and then parsing that output and inserting values into the DB.
- Added Search UI mode. Allows traditional listing mode and Search mode.
Changes:
- Swapped position of Write Zones and Restart server buttons since the old order didnt makes sense as you have to write the zones before restarting the server.

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.

DNS name parser is a Java utility library for parsing dns names, ip and hw addresses.

Synopsis

import su.netdb.parser.*;

Parser parser = new Parser();

Hashtable result = parser.parse(str);

System.out.println("string: "+result.get("string"));
System.out.println("hw: "+result.get("hw"));
System.out.println("name: "+result.get("name"));
System.out.println("domain: "+result.get("domain"));
System.out.println("ip_low: "+result.get("ip_low"));
System.out.println("ip_high: "+result.get("ip_high"));

"DNS name parser" is an utility library created to be used in a search application. Given a single input field its function is to differentiate between several types of possible input strings. Namely if it a dns name, IP address (exact, ip range or ip with wildcards) or hardware address. The result of the parsing is a Hashtable with possible keys "string", "hw", "name", "domain", "ip_low" and "ip_high".

DNS::Config is a Perl module with DNS Configuration.

SYNOPSIS

use DNS::Config;
my $config = new DNS::Config();
$config->debug();

ABSTRACT

This class represents a configuration for a domain name service daemon (DNS).

A domain name service daemon configuration knows about the zone information actively provided to the service users as well as lots of other configuration data.

This class allows to represent this configuration data in a more or less generic way. Another class, the file adaptor, then knows how to write the information to a file in a daemon specific format.

So far this class is strongly related to the ISCs Bind domain name service daemon but it is inteded to get more generic in upcoming releases. Your help is welcome.