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Network and Software: June 2009

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160;   Comments. Blogumulus by Roy Tanck. Campus Network Herarchical Design. Campus Network Herarchical Design. Over time, the hierarchical approach in designing a network has proven as the most effective. The goal in designing a Campus network is to divide buildings, floors, workgroups, and server farms into different layer 3 groups to prevent network faults from effecting a large scale of the network. The layers in a hierarchical design are:. The access layer provides user access to the network. It...

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Network and Software: Ubuntu: OpenLDAP

http://netnsoft.blogspot.com/2011/02/ubuntu-openldap.html

160;   Comments. Blogumulus by Roy Tanck. Ubuntu: Basic Mail Server Configuration. We will install OpenLDAP in Ubunt server. Here, I user Ubuntu server 10.04. After that we will use OpenLDAP for authentication. First, download and install OpenLDAP by using apt-get. Sudo apt-get install slapd ldap-utils. Next, load some schemas to LDAP (LDAP schemas give structure/attributes to LDAP classes, the following schemas will be used for adding users later). Load dynamic backend modules. Take a look at the olcSuf...

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Network and Software: Ubuntu: Basic Mail Server Configuration

http://netnsoft.blogspot.com/2011/02/ubuntu-basic-mail-server-configuration.html

160;   Comments. Blogumulus by Roy Tanck. Ubuntu: Basic Mail Server Configuration. Ubuntu: Basic Mail Server Configuration. We will try to install and configure a mail server solution in Ubuntu. We will use postfix as the SMTP server and Dovecot as the IMAP/POP3 server. We will also use Thunderbird as the client agent for testing purpose. Before you could install a mail server, you need to have a running DNS server with an MX record in it for your domain. Refer to this post. Sudo apt-get install postfix.

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Network and Software: July 2008

http://netnsoft.blogspot.com/2008_07_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. Configuring SSH on a Router. Cisco Security Device Manager. A Cisco router running IOS can be configured as a DHCP server. the steps to configure a Cisco router to be a DHCP server are:. Step 1. Define a range of addresses that should not be used for address allocation. This could be some static ip addresses assigned to servers or printers, switch management IP address and gateway/router address. the command to specify the excluded addresses are. Mask : subnet ma...

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Network and Software: September 2008

http://netnsoft.blogspot.com/2008_09_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. RFC 2080 defines Routing Information Protocol next generation (RIPng) as a simple routing protocol based on RIP (based on RIPv2. has the same features such as, a distance vector routing protocol, max of 15 hops, split horizon and poison reverse). RIPng is no more less and powerfull than RIP, it supports IPv6 network without having to build a new routing protocol. RIPng has the following features. Based on RIPv2 and is similar to it. Uses IPv6 to transport. Manual...

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Network and Software: June 2008

http://netnsoft.blogspot.com/2008_06_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. Distance Vector Routing Protocol. EIGRP is ac Cisco-propietary routing protocol, so only Cisco routers can operate this protocol. Junpier / Nortel wouldn't be able to communicate with your Cisco routers using this protocol. EIGRP is easy to use and manage, but always calculates everything because it's also the main reason of mibehaving networks using EIGRP. This will be enter the configuration of eigrp for asn 100. EIGRP use classless routing. EIGRP doesn't send ...

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Network and Software: March 2010

http://netnsoft.blogspot.com/2010_03_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. Password is one important aspect in computer security. A Password is usually used to enter user-level accounts, email accounts, web accounts, etc. With the. Feature available in some applications, it is important to have a strong password. First there will be a list of bad password characteristics, then there will be a list of that a good password like. Password with less than 8 characters. Password that is using words that can be found in dictionaries. Feature a...

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Network and Software: December 2010

http://netnsoft.blogspot.com/2010_12_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. OSPF: Authentication over a Virtual Link. OSPF: Configuring NBMA Network Type. OSPF: Authentication over a Virtual Link. In OSPF, we can have an area that is not directly connected to the backbone area by using the virtual link. The command to configure authentication on a virtual-link is:. Area NUMBER virtual-link A.B.C.D message-digest-key NUMBER2 md5 WORD. The area number where both virtual-linked routers reside. The router-id of the peer router. Now, since au...

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Network and Software: May 2009

http://netnsoft.blogspot.com/2009_05_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. Drupal installation .htaccess error. Organizations can take advantage of having their employeer working away from the office. It's quite possible now with the advance of broadband and wireless technology. Data, video and real-time applications can be transferred and distributed across the networks. WAN layer 2 technologies, including Frame Relay, ATM and lease dlines. the security of these services depends on the service provider. Components at corporate. VPN...

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Network and Software: July 2009

http://netnsoft.blogspot.com/2009_07_01_archive.html

160;   Comments. Blogumulus by Roy Tanck. The Control Plane (Basic). The internet has been a unified place to access almost any information needed. But, some internet contents are not appropriate to be seen at work, it's just at the wrong time and at the wrong place. Gambling and adult sites are examples of this. But there are some sites that fall into ". How URL Filtering works? The advantages of the black/white list are:. It provides a basic solution if a few specific URLs need to be exempted. It provi...