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In: OpenSource Router
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XORP pronounced as "Zorp" is eXtensible Open Router Platform. XORP is an extensible open source routing platform released under a BSD style License. While designed for extensibility, XORP provides a fully featured platform that implements IPv4 and IPv6 routing protocols and a unified platform to configure them. Vyatta Opensource router implements XORP routing platform. XORP is the only open source platform to offer integrated multicast capability. XORP's modular architecture allows rapid introduction of new protocols, features and functionality, including support for custom hardware and software forwarding.Read More →

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In: Cisco
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In Cisco IOS, EXEC mode commands cannot be run from the Global Configuration mode or in any other configuration mode. This means, everytime an admin makes a change from the configuration mode (Global Config) then you have to "end" or "Ctrl+Z" back to the EXEC mode and run the EXEC commands like "show", "clear" and "debug" commands.With the "do" command thats a thing of the past. The "do" command can be used to run any EXEC commands from within Global Configuration mode or any other Configuration mode without having to end the config mode.Read More →

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In: Networking, Windows
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Sometimes, there is a need to have more than one IP Addresses assigned to a PC or a Server. If you have multiple services running on a server like a webserver and a mail server and want to assign each of these services seperate IP Addresses the Multiple IP addresses will help. While this need not necessarily require to have more than one Network Interface Card (NIC) on the server.Read More →

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In: Cisco, Sniffing/PacketCapture
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Cisco SPAN port is a SwitchPort ANalyzer on the cisco catalyst that allows to select and span or copy traffic from one or more source switchports or source VLANs onto one or more destination ports. The destination port(s) runs a sniffing or a packet capture program like Ethereal, Wireshark or TCPDump. Cisco IOS support Local SPAN and Remote SPAN (RSPAN).Read More →

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In: Linux, Opensource NAC, Security
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Packet Fence is an OpenSource NAC (Network Access Control) Solution available under GPL license and is completely free. Packet Fence is a Network Access Control solution with world class features and many features beating those provided by expensive commercial alternatives. Mostly installed in acamedic institutions, please visit here to find a list of organisations and institutions that use Packet Fence as a Network Access Control system.Read More →

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In: Cisco, Secure Shell(SSH)
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Using Telnet for remote administration of Cisco Routers and Switches (infact for any other device like a unix,linux or a solaris seerver) is not very secure as the data including the passwords are sent in clear text. It will only be a matter of time for a malicous attacker who can sniff the packets to gain access to the passwords and infact the whole network. It is recommended that Secure Shell (SSH) is used for remote administration of Cisco Routers and Switches.  NOTE: Cisco IOS on the Catalyst switches are by default supplied with the SSH feature bultin. However, the basic Cisco IOS for theRead More →

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In: Opensource Firewall, Security
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Endian Firewall is an Opensource Linux Firewall based on the IPCop Linux Firewall, a very popular Opensource firewall. Endian Firewall is almost an opensource Universal threat Management (UTM) device with a Stateful firewall, VPN, Webproxy, SIP proxy for VoIP, Web Security, Content Filtering, Mail gateway and Antivirus, Anti-spyware and Anti-phishing capabilities.Read More →