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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 […]
November 5, 2011
1. Netgear has new routers with more CPU and memory Unfortunately the strongest router has at this time no ddwrt support. Model CPU RAM Flash Interface WLAN WNR3500L 480 MHz BCM4718 MIPS® 74K 64 MB 8 MB 5 GigEthernet 802.11 b/g/n 2.4 GHz WNR3500L v2 480 MHz MIPS® 74K 128 MB 128 MB 5 GigEthernet […]
November 5, 2011
By default there is no SWAP on the ddwrt routers, in case you need it you have to setup it on your own, but that is not so complicated, just read the documentations. Source documentation: http://www.dd-wrt.com/wiki/index.php/Linux_SWAP#Requirements Here is what I have done: 1. Create a file for the swap root@mygateway:/# dd if=/dev/zero of=/mnt/myswap.swp bs=1k count=80000 […]
December 1, 2010
Under Linux we have a lot of apps and commands that can help us at work or to test something. Here I collected the tools and commands that I have already used or wanted to use, but up till now did not managed. Comments are welcomed if you know a better tool. Network generators tcpreplay […]
November 25, 2010
It is not a bad idea if you have a L3 Device that you can reach whenever you want and that has all the basic troubleshooting tools like nslookup, netcat, tcpdump, openssl, ssh, openvpn… A Netgear WRN3500L router with ddwrt can be really helpful. It provides you WLAN access at home, access to your NAS […]
November 25, 2010
0. Specification of the test enviroment 0.1 Softwares Tested Operating Systems 1. OpenSUSE 11.0 2. Fedora 9 Kernel versions Linux linux-jnwt 2.6.25.20-0.1-pae #1 SMP 2008-12-12 20:30:38 +0100 i686 i686 i386 GNU/Linux Mail server netqmail-1.06.tar.gz ucspi-tcp-0.88.tar.gz daemontools-0.76.tar.gz AntiVirus clamav-0.94.2.tar.gz Spamfilter Mail-SpamAssassin-3.2.5.tar.gz Mail scanner qmail-scanner-2.05.tgz maildrop-2.0.4.tar.bz2 DNS djbdns-1.05.tar.gz In my test the folder for all downloaded files […]
November 24, 2010
Step 1. General informations Objectives Authenticate users in LAN for Internet access Content filtering for Internet traffic: URL filtering Virus scanning Advert blocking Customized information of block reasons for users Content Caching Not detailed Installations of programs QoS with Squid proxy server Controlling users max IP address with Squid proxy server Encrypted authentication with LDAP […]
itsecworks 
November 6, 2011
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