Free reverse lookup software for linux

Geo::Lookup::ByTime is a Perl module to lookup location by time.

SYNOPSIS

use Geo::Lookup::ByTime;

$lookup = Geo::Lookup::ByTime->new( @points );
my $pt = $lookup->nearest( $tm );

Given a set of timestamped locations guess the location at a particular time. This is a useful operation for, e.g., adding location information to pictures based on their timestamp and a GPS trace that covers the same time period.

INTERFACE

new( [ points ] )

Create a new object optionally supplying a list of points. The points may be supplied as an array or as a reference to an array. Each point may be a reference to a hash containing at least the keys lat, lon and time or a reference to an object that supports accessor methods called latitude, longitude and time.

If a coderef is supplied it is assumed to be an iterator that may be called repeatedly to yield a set of points.

add_points( [ points ] )

Add points. The specification for what constitutes a point is the same as for new.

nearest( $time [ , $max_dist ] )

Return a hash indicating the estimated position at the specified time. The returned hash has lat, lon and time keys like this:

my $best = {
lat => 54.29344,
lon => -2.02393,
time => $time
};

Returns undef if the position cant be computed. By default a position will be calculated for any point that lies within the range of time covered by the reference points. Optionally $max_dist may be specified in which case undef will be returned if the closest real point is more than that many metres away from the computed point.
If the requested time coincides exactly with the timestamp of one of the points the returned point will be at the same location as the matching point. If the time falls between the timestamps of two points the returned point will be linearly interpolated from those two points.

In an array context returns a list containing the synthetic point at the specified time (i.e. the value that would be returned in scalar context), the closest real point and the distance between the two in metres

my ($best, $nearest, $dist) = $lookup->nearest( $tm );

get_points()

Return a reference to an array containing all the points in ascending time order.

time_range()

Return as a two element list the time range from earliest to latest of the points in the index. Returns undef if the index is empty.

hav_distance($pt, ...)

Exportable function. Computes the Haversine distance in metres along the line described by the points passed in. Points must be references to hashes with keys lat and lon.

Network Query Tool is a one-stop solution for obtaining information about a domain name or an IP address.
Instead of manually using a variety of shell commands, or visiting numerous websites to investigate a host, just load Network Query Tool in your browser and enter the hostname or IP. NQT does the rest, as is evidenced by this sample output.
Main features:
- Reverse lookup - resolves an IP address to a hostname (if one exists) or vice versa
- DNS query - aka Dig, requires a dig binary on your system
- Whois (WWW) - gets domain registration information. Now supporting just about every known TLD, gTLD, and ccTLD.
- Whois (IP) - gets IP owner information. Supports all IP blocks maintained by ARIN (US), RIPE (Europe), JPNIC (Japan), APNIC (China/Asia-Pacific), BRNIC (Brazil), LACNIC (Latin America), AFRINIC (Africa), and KRNIC (Korea).
- Check port - Determine whether or not a port on the target host is open. Defaults to port 80.
- Ping - performs a 5-packet ping to the target, requires a ping binary.
- Traceroute - performs a traceroute to the target, requires a traceroute binary.

Zebedee is a simple program to establish an encrypted, compressed "tunnel" for TCP/IP or UDP data transfer between two systems.
This allows data from, for example, telnet, ftp and X sessions to be protected from snooping. You can also use compression, either with or without data encryption, to gain performance over low-bandwidth networks.
Zebedee is made with next goals in mind:
Provide client and server functionality under both UNIX/Linux and Windows.
Be easy to install, use and maintain with little or no configuration required.
Have a small footprint, low wire protocol overhead and give significant traffic reduction by the use of compression.
Use only algorithms that are either unpatented or for which the patent has expired.
Be entirely free for commercial or non-commercial use and distributed under the term of the GNU General Public Licence (see LICENCE.txt for details).
For further information on how to use Zebedee see the filezebedee.html in the distribution (or the manual page for zebedee(1) under UNIX -- it is basically the same text). Example
configuration files are also provided.
Versions of Zebedee in the 2.4.x series are stable, "production" versions. The development series, containing new features, but less well tested is numbered 2.5.x.
Enhancements:
- Fix file descriptor leak when IP address lookup fails.
- Fix problem with running a server in "reverse" mode and detached -- only
- apparent on Windows.
- Add "maxconnections" to alleviate DoS attack.
- Check for target port 0 to avoid DoS.
- Linux 64-bit port (a result of the "Linux on POWER" contest) courtesy of
- Stew Benedict . Use the "linux64" OS target.
- Upgraded version of bzip2 and zlib.