Browsing All Posts filed under »Linux«

openssl update on ddwrt, is it Checkmate or Check?

April 17, 2012

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After reading an old articel on TLSv1 vulnerability I wanted to test it. The website I have red about this TLSv1 Issue: http://www.theregister.co.uk/2011/09/19/beast_exploits_paypal_ssl/ After reading I wanted to look for a webserver that support TLSv1. For that task I need only an openssl on a device with public internet access, that is actually my ddwrt […]

save and rotate backups

March 16, 2012

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This is a really simply and of course my first script to copy firewall backups to a remote server and rotate the backups. – The script generate log files and list the files that were modified (copied or deleted). – The first part of the script checks on the remote server the old backups and […]

Timestamps of a file

March 16, 2012

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For example to make a correct log file rotation or backup rotation or other kind of file rotation it is good to understand what kind of timestamp a file has and which one can be affected and how it can be affected. Here are documented the basic 3 linux commands that can be used to […]

How to loose everything and get it back

December 29, 2011

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I had a dualboot laptop with windows XP and Ubuntu 11.10. I had the following partitions for Ubuntu: partition for “/boot”. This was the boot partition root partition “/” swap partition and an ntfs partition for windows and another one for the data. After installing XP I have lost the partitions table and the windows […]

Security tools with ddwrt and optware – Part II.

November 10, 2011

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..!OPEnvPN!.. This is madness! It is the simpliest and cheapest ssl vpn solution I have ever seen and I can use it on my ddwrt router. I have documented here what and how I did, just in case I need it later, but shortly it is an openvpn setting on ddwrt router with certificate authentication. […]

Security tools with ddwrt and optware – Part III.

November 6, 2011

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privoxy I am too tired to write about privoxy so I just copy the description from privoxy.org: “Privoxy is a non-caching web proxy with advanced filtering capabilities for enhancing privacy, modifying web page data and HTTP headers, controlling access, and removing ads and other obnoxious Internet junk. Privoxy has a flexible configuration and can be […]

Security tools with ddwrt and optware – Part I.

November 6, 2011

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On a small router like Netgear WNR3500L we can install and use many security open source tools. I tested the followings free softwares just for fun: – Snort – Nmap – Tcptraceroute – Hping I do not know What performance degradation I could expect if those are running on the router, but there are some […]