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HowTo Bind A Range Of IP’s in Debian / Ubuntu Linux
I've recently installed Debian Linux 4.0 on my server and Ubuntu Linux 7.04 on Laptop. I would love to have a multiple IP address that I can use for verity of purposes. I would like to bind 4 IP's to...
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Block ip address of spammers with iptables under Linux
Q. How do I block ip address of spammers with iptables based firewall under CentOS Linux 5? A. You can simply block IP address of spammers by editing /etc/sysconfig/iptables file under: a) CentOS Linux...
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Lighttpd virtualhost configuration ~ name-based virtual hosting
Q. How do I configure lighttpd web server as virtual host for serving multiple web site from a single public IP address (name-based virtual hosting)? A. Virtual hosting is a method that servers such as...
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How to: Detect Duplicate IP Address With arping command under Linux
Q. I run quite large network with different subnets. I'd like to know how can I find out duplicate IP address under Linux / UNIX? A. You can use arpping command. The arping utility performs an action...
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BIND Change the IP Address of a Domain or HOST
Q. How do I Change the IP Address of a Domain or Host under BIND 8 or 9?Read answer to: "BIND Change the IP Address of a Domain or HOST"
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Diagnosing a dos Attack Under Linux
Q. How do I find out if I Linux box is under DoS attack or not form a shell prompt? A. You can simply use netstat command to print out a list of all open connection to your Linux box. The list will be...
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How To AIX UNIX Configure TCP/IP Networking ( NIC )
How do I configuring TCP/IP and the network interface under AIX UNIX operating system?Read answer to: "How To AIX UNIX Configure TCP/IP Networking ( NIC )"
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Linux / FreeBSD: Multiple IP Addresses on One Interface
Can one Linux / BSD system respond to multiple IP address on a single Ethernet interface? I need to run multiple web sites and mod_ssl with a single server. How do I configure my box for multiple IP...
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Iptables: Unblock / Delete an IP Address Listed in IPtables Tables
Q. I am a brand new user of a Linux iptables and I can't find how to instruct my iptables to delete or unblock an IP address listed in iptables firewall. I'm using Debian Linux version. Can you help...
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How To: Find IP Address Owner
I'm getting lots of spam from few IPs. How do I find the owner of an IP address and report them to concern parties?Read answer to: "How To: Find IP Address Owner"
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Linux Iptables: Add / Delete An IP Address Remotely Using A Shell Script
I've root ssh access and need to add / delete a few IP address on fly using the IPtables command via local shell script. How do I add or delete an IP address remotely over the SSH session under CentOS...
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Linux / UNIX Command To Find Out Who Owns a Domain Name
How do I find out who owns a Internet domain name and its ip address?Read answer to: "Linux / UNIX Command To Find Out Who Owns a Domain Name"
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Reverse nslookup Command
How do I use nslookup command line administrative tool for testing and troubleshooting DNS servers including reverse lookup under UNIX or Windows operating systems? How do I look up an IP address of a...
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Linux / UNIX: DNS Lookup Command
How do I perform dns lookup under Linux or UNIX or OS X operating systems without using 3rd party web sites for troubleshooting DNS usage?Read answer to: "Linux / UNIX: DNS Lookup Command"
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Iptables Drop IP Address
How do I block particular IP addresses or host with the iptables command under Linux? You need to use the following syntax to drop an IP address or host with the iptables command. WARNING! These...
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HowTo: Linux Send a Gratuitous ARPs Requests [ Networking ]
How do I send gratuitous ARPs under Linux? How do I tell my DUMMY router that the IP is over here now, under Linux operating systems?Read answer to: "HowTo: Linux Send a Gratuitous ARPs Requests [...
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Linux: Iptables Find / Check Banned IP Address
How do I find or check IP's that are currently banned using iptables command in Linux? How do I verify that IP address 1.2.3.4 is banned or not in Linux?Read answer to: "Linux: Iptables Find / Check...
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Lighttpd Configure Subdomain
I've main domain configured at http://example.com and I'd like to use http://support.example.com with different files. How do I add subdomain support with Lighttpd web server under UNIX or Linux...
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Linux / Unix: Look Up IP Addresses
How can I look up IP addresses under UNIX or Linux operating systems using command line options?Read answer to: "Linux / Unix: Look Up IP Addresses"
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Ubuntu Linux Release an IP Address ( DHCP IP )
How can I release an IP in Ubuntu Linux using command line options?Read answer to: "Ubuntu Linux Release an IP Address ( DHCP IP )"
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