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Monthly Archives: November 2008
How to setup access list for a Cisco VLAN
We can use VLAN ACL (also called VLAN map) to provide packet filtering for all types of traffic that are bridged within a VLAN or routed into or out of the VLAN. Unlike Router ACL, VACL is not defined by … Continue reading
Posted in Networking, Security
Tagged ACL, Cisco, Cisco Access list, packet filtering, router, traffic filtering, VLAN
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Configuring default VLAN in Cisco switch
After connecting a switch to your network, it will be useful if the network administrator can login remotely into it to do troubleshooting, check logging and so on. The easiest way to manage your switch remotely over the network is … Continue reading
Posted in Networking
Tagged administrator, Cisco, default gateway, login, network, switch, troubleshooting, VLAN
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How Computer resolves hostname
Basically there are 2 ways in resolving hostname to IP address: 1. DNS 2. Host file The easiest way is to register a hostname in a DNS server. All computers in the network point the DNS server setting to this … Continue reading
Posted in Networking
Tagged administrator, computer, DNS, hostname, hosts file, Linux, unix, windows
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Default VLAN
The default VLAN on all switches is VLAN 1. By default, all ports in a Cisco switch belong to VLAN 1. With all ports in the same VLAN (in this case VLAN 1), all ports can communicate with each other … Continue reading
How to limit access from network host to a Cisco device
Sometime you may like to limit only certain IP address to access your Cisco router / switch by using telnet. You may implement it by configuring the access list and apply it to the line vty 0 4 line.
Posted in Networking, Security
Tagged Cisco, Cisco Access list, IP, IP address, network, router, switch, telnet
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How to encrypt Cisco Password
One of the way to secure a Cisco router / switch is to encrypt password in it. In order to encrypt passwords that are saved in the Cisco devices configuration file, you may use the “service password-encryption” global configuration command. … Continue reading
Workgroup vs. Domain in Windows 2003 environment
There are two modes of operation in Windows 2003 environment. Basically a computer can work as workgroup computer or domain computer. Most home and small business environments will be Workgroup, and most enterprise businesses will run in domain mode. Basically … Continue reading
Posted in Networking, PC, Security
Tagged computer, domain, network, Password, server, windows, windows2003, workgroup
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How to add a computer to a Windows Server 2003 domain
Here is a simple howto on adding windows 2003 computer to a Windows Server 2003 domain. This should be valid for other version of windows client computers too. Before performing the following steps, make sure that your computer can reach … Continue reading
Posted in Networking, PC
Tagged domain, domain controller, join domain, Microsoft, ping, windows, windows2003
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Quick fix to solve network connectivity problem in vmware guest virtual machine
This is a quick fix to vmware network virtualization. Sometime while using vmware, your guest virtual machine may face the problem with network connectivity. I have this problem with two of my virtual machines the other day. Only one of … Continue reading
Posted in Networking
Tagged ethernet, network, network interface, network problem, Networking, physical address, virtual machine, virtualization, vmware
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CamStudio
CamStudio is a software which I use to record all screen activity on my computer for use in software demonstrations and presentations. Before discovering this freeware, I use Jing most of the time in recording video of what I do. … Continue reading