Skip to main content

IPtables, SVN, and NMAP

I reviewed some material on IPtables, SVN, and NMAP just for the sake of keeping my mind busy. Here are some useful notes:

  1. IPtables - best resource found at HERE
  2. SVN - best, as in the quickest and simplest intro could be found HERE
  3. NMAP - I honestly don't see in using it for more than port-scanning in a few instances. Anyway, here are a few other options that might come in handy at some point.
nmap -sT/sS/sX/sF/...[-P0] IPADDRESS(range) == to check which ports are open
nmap -sP IPADDRESS(range) == a simple ping scan for availability
nmap -sO IPADDRESS(range) == check what IP protocols are available
nmap -sV IPADDRESS(range) == a scan with version detection
Other useful flags:
-O == detects OS, part of -v (verbosity) flag as well
-A == detects OS and versions
-v == request high verbosity/detail
-F == performs a fast scan of only a few common ports

Installing Perl modules

Perl modules may be installed using the CPAN module or from source.
SOURCE

From CPAN

perl -MCPAN -e shell (to get an interactive CPAN shell)
perl -MCPAN -e 'install Time::JulianDay' (if you know the name of the module, you can install it directly without interacting with the CPAN shell)

Typing just perl -MCPAN -e 'install PerlMol', I managed to install the PerlMol module from scratch.

Manual installation

1. Download the Perl module from CPAN or other site.
2. Extract the tarball.
3. Run perl Makefile.PL
4. Run make
 5. Run make test
6. Run make install

Checking for existence of a Perl module

perl -e 'use module' checks if the module is installed.

For example, I checked if I have the Trig module by typing this prompt:
perl -e 'use Math::Trig'
Labels:

Comments

Post a Comment

Popular posts from this blog

Distribution of Wealth in the US

The rich get richer and the poor get poorer. I heard this statement quite a bit lately particularly in light of the sub-prime mortgage and general housing crisis in the US. The country has enjoyed significant economic prosperity and both Clinton and Bush boasted economic growth under their reign. Unfortunately, the beneficiaries of the economic boom are not people from all economic backgrounds, but rather the top 10%. To make things worse, Bush gave tax cuts mainly targeting the top 10%. Being more of a numbers guy, I always wanted showing the validity of the-rich-get-richer-n-the-poor-get-poorer statement. Thanks to Wikipedia , I have finally found it!! Both the mean and median net worth of families for the bottom 50% of the population has remained absolutely flat while the 75th-90th percentile see a decent growth and the top 10% enjoy the most appreciation on their net worth. So, if you factor in inflation, the-rich-get-richer-n-the-poor-get-poorer probably holds true. The g...
1 comment
Read more

Online Storage Solutions

Problem: I often need to have some files readily available online so that I can access them from any computer. There are many ways to go about solving this problem and each comes with its set of shortcomings: Yahoo! Briefcase - 30MB limit Online storage services like Box.net, Xdrive, MediaMax - usually cost money; signing up is cumbersome Email to myself as an attachment - enough said there It's time to find a home-made solution. The solution I am about to suggest is intended for -- A *NIX user someone with access to a *NIX web server Solution: I am a linux user and I have user level access to a web server. The web server is configured such that the public does not have access to directory structure. So, I would need to write a script that copies my files to the web server and creates an index listing my files. Password protection of the storage would follow after that. Client Side: Use the following script to transfer file to server, make the file readable by public and execu...
Post a Comment
Read more

VP Picks and Chances of a President Dying in Office

After McCain picked a relatively unqualified and inexperienced Sarah Palin, many people gasped at the possibility of Palin having to take over the presidency in case something happens to McCain. I think McCain dying in office is overstated considering he appears healthy and fit despite the recurrence of a malignant melanoma. Plus, he has been getting great healthcare due to his status and will continue to do so whether or not he wins the presidency. That said, it would be nice to get numbers on chances of McCain's survival as a function of his age. Thankfully, that information was provided by Alex Burns at Politico . The odds of a 72-year-old man living four more years, or one full White House term, are better. But for a man who has lived 72 years and 67 days (McCain’s age on Election Day this year), there is between a 14.2 and 15.1 percent chance of dying before Inauguration Day 2013 , according to the Social Security Administration’s 2004 actuarial tables and the authoritati...
Post a Comment
Read more