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.
Category: Networking
Disable ICMP Redirects in Windows(2000,XP,2003)
ICMP redirect is a type 5 ICMP error message sent by a gateway router to a sending host informing of an optimal alternate route to the destination host and to update its routing table with the new host route to the target destination host.
ICMP Redirects being an inefficient way to update a hosts routing table of an optimal route to a target destination can cause security issues. A malicious hacker with little knowledge about the network can launch a Denail of Service (DoS) attack on a host on the network.
ICMP Redirect messages from a gateway router
ICMP Redirect is a type 5 ICMP error message sent by a gateway router to a sending host informing of an optimal alternate route to the destination host and to update its routing table with the new host route to the target destination host. The router forwards the original packet to the next hop router or to the destination host and sends the ICMP Redirect message to the sending host so that the subsequent packets to the destination host can be sent via the new route.
ClarkConnect – OpenSource Firewall Intrusion Prevention networking and collabration suite
ClarkConnect is an all-in-one Opensource networking suite from Point Clark Networks. It is a full blown security suite on one front with Stateful firewall protection, Intrusion Detection and prevention, Maile Gateway with Antivirus, Anti-spam and Anti-phishing support, proxy & web content filtering, peer to peer connection filtering for web protection while is also a networking suite with IPSec and PPTP support, bandwdith and system monitoring and a server with web-server, Database server support, file & print sharing, mail server, system and mail backup. All built on a cut down redhat linux with a good web interface.
HowTo: Change Default Gateway or Default Router in Sun Solaris
The Default Gateway or the Default Router is the IP address (IPv4) to which all the traffic to any target destination(s) which does not have a route in the Routing Table of the server will be forwarded.
This Default Gateway is maintained in the file
/etc/defaultrouter [IPv4 only]
HowTo: Change IP Address in Solaris 10 without reboot
Adding or editing the IP address on a Solaris 10 server is different from the previous versions of the OS (Solaris 9, Solaris 8 etc).
In the previous versions of the Solaris Operating System, you need to edit the /etc/hosts file and add/edit the entry for the IP address and the hostname.
Switch Miner – Opensource Cisco Switchport discoverer
Map your Cisco Catalyst switchports with Switch Miner. Switch Miner is a lightweight command line tool for Windows that queries Cisco switches using SNMP to discover the devices that are connected to the switchports.