Skip to content

Meta

  • Register
  • Log in
ItsyourIP.com

Your gateway to Internet

Primary Navigation Menu
Menu
  • About
  • Contact Me
  • Free Antivirus
  • Free Firewall
  • Sitemap

DHCP

Enable/Configure DHCP Snooping in Cisco Catalyst Switches (IOS)

2008-05-15
By: admin
In: Cisco
Tagged: Cisco, denial-of-service, DHCP, DHCP-Snooping, ios, Option82, Security

DHCP snooping is a DHCP security feature that provides security by filtering untrusted DHCP messages and by building and maintaining a DHCP snooping binding table. An untrusted DHCP message is a message that is received from outside the network or firewall causing denial of service attacks. The DHCP snooping binding table contains the MAC address, IP address, lease time, binding type, VLAN number, and interface information that corresponds to the local untrusted interfaces of a switch. An untrusted interface is an interface that is configured to receive messages from outside the network or firewall. A trusted interface is an interface that is configured to receiveRead More →

Yersinia – Free Network Testing tool for CDP,STP,VTP,DHCP,DTP,ISL,802.1Q,802.1X

2008-02-19
By: admin
In: IP Tools, Security, Security/Penetration Testing
Tagged: 802.1Q, 802.1X, bpdu, CDP, DHCP, DTP, ISL, Network-Testing, stp, VTP, Yersinia

Yersinia is a free Network Penetration testing tool used to test and analyse some of the most commonly used protocols on your network. Penetration testing tools of this kind will provide deep insight on network security issues. Yersinia is a UNIX based tool that works on Linux, Solaris 8, FreeBSD. NOTE: The tool is described as a tool to perform network tests and exercise responsible actions when performing tests which includes obtaining the permission from responsible authorities. DO NOT USE THIS TOOL FOR ANY UNAUTHROSIED HACKING PURPOSESRead More →

Dnsmasq – Opensource DNS Server Forwarder & DHCP Server

2007-12-17
By: admin
In: Debian, DHCP, DNS, OpenSource, Redhat, Ubuntu
Tagged: Debian, DHCP, DNS, dns-forwarder, dnsmasq, firewall, OpenSource, Redhat, routers, Ubuntu

Dnsmasq is an opensource light-weight,easy to configure and administer DNS and a DHCP Server. Dnsmasq is ideally suitable for smaller networks like Small Office and Home Office networks (SOHO) and branch office networks. Dnsmasq can be run on old PC and is very easy to configure and administer. Dnsmasq is seen to support upto 1000 nodes on a network.Read More →

DHCP Relay Agent for subnets without a DHCP Server

2007-11-13
By: admin
In: Cisco, DHCP, Networking, Windows
Tagged: Cisco, DHCP, relay-agent, router, rras, server, Windows

A DHCP server is the one which provides a network client with a unique IP address, Subnet mask, Gateway and DNS server IP address automatically when it connects to the network. A DHCP Relay Agent is a computer, server or a Router in a particular subnet which receives a DHCP client broadcast and relays it to a DHCP server in another network or a subnet. A DHCP Relay Agent is more a helper agent here that gets the client a DHCP lease.Read More →

Smoothwall Express 3.0 – Opensource Firewall

2007-10-27
By: admin
In: Opensource Firewall
Tagged: DHCP, firewall, gpl, ids, intrusion, Linux, nat, OpenSource, Opensource Firewall, proxy, smoothwall, voip

Are you throwing away your old PC??? Think again!! Smoothwall Express 3.0 [Codename: POLAR] is a free opensource linux based firewall which can installed and be up and running in just in minutes. Smoothwall Express 3.0 is licensed under GPL license.Read More →

Number 87 haunts Windows 2003 DHCP server

2007-10-26
By: admin
In: Windows
Tagged: DHCP, microsoft, netsh, reservation, scope, server, Windows

We recently ran into this problem wherein the DHCP MMC started throwing errors anytime we try to launch it. After a good length of troubleshooting, we found that the number of reservations on the DHCP were 87. Sounds crazy???Read More →



Categories

  • ARP
  • Browser
  • Cisco
  • Database
  • Debian
  • DHCP
  • DNS
  • DNS Records
  • Firefox
  • internet-explorer
  • IP Tools
  • juniper
  • Linux
  • MySQL
  • Network Inventory
  • Networking
  • OpenSource
  • OpenSource Clustering
  • Opensource Firewall
  • OpenSource LoadBalancer
  • Opensource NAC
  • OpenSource Router
  • Opensource VPN
  • proxy
  • Python
  • Redhat
  • Secure Shell(SSH)
  • Security
  • Security Audit
  • Security/Penetration Testing
  • Sniffing/PacketCapture
  • Solaris
  • Tools
  • Ubuntu
  • Unix
  • VirtualBox
  • voip
  • vpn
  • Windows
  • Wireless

Tags

acl Browser Cisco DHCP DNS DNS Records encryption Firefox firewall gateway High-Availability icmp internet ios ip ip-address ipsec IP Tools juniper Linux mtu network OpenSource Opensource Firewall OpenSource LoadBalancer proxy Redhat registry rhel route router routers Security snmp Solaris switch tcp tcpip udp Unix virtual-server vlan vpn Windows Wireless

Recent Posts

  • MySQL: how to delete all records from a table
  • Python: Remove last ‘n’ characters of a string
  • How to block select in PuTTY
  • How to enable/disable Right-click paste in PuTTY
  • How to change the HOST key in Oracle Virtualbox Manager
  • FileZilla FTP Client configuration through BlueCoat proxy
  • Unable to delete Stale/Obsolete statc routes in Cisco IOS
  • How to create VLAN Interfaces for InterVLAN Routing in Cisco IOS
  • High CPU usage when SNMP is enabled in Cisco Routers
  • Import WyseTerm Host List from one user to another in Windows

RSS Secunia Advisories

RSS MS Security Bulletin

RSS US-CERT Vulnerability

RSS SANS

Recent Comments

  • Forwarding ICMP over a server without redirects on How to Disable ICMP Redirects in Linux for security (Redhat,Debian,Ubuntu,SuSe tested)
  • M.Pasha on How to Disable ICMP Redirects in Linux for security (Redhat,Debian,Ubuntu,SuSe tested)
  • Steve Pollard on How to prevent VLAN Hopping in Cisco Switches
  • Routing issue Sophos UTM Home <-> Cisco ASA 5510 for only linux hosts? - Sophos User Bulletin Board on How to Disable ICMP Redirects in Linux for security (Redhat,Debian,Ubuntu,SuSe tested)
  • BranchCache – Hosted Cache Mode File Server Tutorial | theezitguy on HowTo: Add persistent Static Routes in Windows

Designed using Responsive Brix Premium. Powered by WordPress.