Monitor dan Memblok Trafik Virus Pada Cisco Router

 
source = http://dedenthea.wordpress.com/2007/02/04/monitor-dan-memblok-trafik-virus-pada-cisco-router/

Pengantar

Router merupakan sebuah device yang berfungsi untuk meneruskan paket-paket dari sebuah network ke network yang lainnya (baik LAN ke LAN atau LAN ke WAN) sehingga host-host yang ada pada sebuah network bisa berkomunikasi dengan host-host yang ada pada network yang lain. Router menghubungkan network-network tersebut pada network layer dari model OSI, sehingga secara [...]

Apa Itu Vlan (Virtual Local Area Network)

 
source = http://dedenthea.wordpress.com/2007/02/07/apa-itu-vlan-virtual-local-area-network/

PENGANTAR
Pemanfaatan teknologi jaringan komputer sebagai media komunikasi data hingga
saat ini semakin meningkat. Kebutuhan atas penggunaan bersama resources yang
ada dalam jaringan baik software maupun hardware telah mengakibatkan timbulnya
berbagai pengembangan teknologi jaringan itu sendiri. Seiring dengan semakin
tingginya tingkat kebutuhan dan semakin banyaknya pengguna jaringan yang
menginginkan suatu bentuk jaringan yang dapat memberikan hasil maksimal baik
dari segi [...]

Apa Itu Router

 
source = http://dedenthea.wordpress.com/2007/02/07/apa-itu-router/

Mengapa perlu router
Sebelum kita pelajari lebih jauh mengenai bagaimana mengkonfigurasi router cisco, kita perlu memahami lebih baik lagi mengenai beberapa aturan dasar routing. Juga tentunya kita harus memahami sistem penomoran IP,subnetting,netmasking dan saudara-saudaranya.
Contoh kasus:
Host X à 128.1.1.1 (ip Kelas B network id 128.1.x.x)
Host Y à 128.1.1.7 (IP kelas B network id 128.1.x.x)
Host Z [...]

Konfigurasi VoIP di Cisco Router

source = http://dedenthea.wordpress.com/2007/02/04/konfigurasi-voip-di-cisco-router/
1. Tujuan.
Membuat koneksi VoIP dengan sistem “Trunk”, cocok dipakai untuk keperluan komunikasi data dan suara pada industri OIL, Mining dan segala jenis industri yang terletak dikejauhan dan yang sangat jarang dan susah untuk mendapatkan direct line PSTN.
2. Peralatan yang dibutuhkan.
Hardware :
- 2 Buah cisco seri 2621XM
- 2 Buah NM-2V= ( Network Module untuk [...]

Konfigurasi Dasar Cisco Switch

 
source = http://dedenthea.wordpress.com/2007/02/01/konfigurasi-dasar-cisco-switch/

Pendahuluan
Pada setiap design komputer network kita akan selalu menggunakan konsentrator. Apakah itu berupa Hub ataupun Switch. Pada awalnya kita menggunakan Hub dengan segala kelebihan dan kekurangannnya, lalu muncul Switch yang lantas menggantikan peranan Hub dalam sebuah design komputer network baik dalam skala besar maupun kecil. Hal ini di sebabkan karena performance Switch lebih [...]

Pengantar Pengaturan Dasar IOS Cisco

source = http://dedenthea.wordpress.com/2007/02/01/pengantar-pengaturan-dasar-ios-cisco/
Sebuah Cisco router, seperti layaknya PC yang ber Operating System(OS), tidak bisa beroperasi tanpa Cisco Internetworking Operating System(IOS). Untuk pemahaman dalam pengaturan IOS Cisco, penulis mencoba untuk mengsistimasikan bahan ini dalam tiga topik dasar : Jenis Memory pada Standard Cisco Router, Prosedur dan Konfigurasi Boot , dan Pengaturan Image IOS & Config File.

Cisco [...]

Pengantar Pengaturan Dasar IOS Cisco

source = http://dedenthea.wordpress.com/2007/02/01/pengantar-pengaturan-dasar-ios-cisco/
Sebuah Cisco router, seperti layaknya PC yang ber Operating System(OS), tidak bisa beroperasi tanpa Cisco Internetworking Operating System(IOS). Untuk pemahaman dalam pengaturan IOS Cisco, penulis mencoba untuk mengsistimasikan bahan ini dalam tiga topik dasar : Jenis Memory pada Standard Cisco Router, Prosedur dan Konfigurasi Boot , dan Pengaturan Image IOS & Config File.

Cisco [...]

Pengantar Cisco Router

 
Definisi Router
Router adalah sebuah device yang berfungsi untuk meneruskan paket-paket dari sebuah network ke network yang lainnya (baik LAN ke LAN atau LAN ke WAN) sehingga host-host yang ada pada sebuah network bisa berkomunikasi dengan host-host yang ada pada network yang lain. Router menghubungkan network-network tersebut pada network layer dari model OSI, sehingga secara teknis [...]

Create VLAN on CISCO Catalyst 2960G

” My VLAN Sample Configuration on CISCO Catalyst 2960G  
VLAN 2 Connected to NET1 192.168.0.0/16
VLAN 3 Connected to NET ASTINET
VLAN 4 Connected to NET INHERENT “
source = http://unilanet.unila.ac.id/~gigih/index.php?option=com_content&task=view&id=102&Itemid=40

Netbios Session, Bikin Macet Jaringan

Protokol yang satu ini - Netbios session, membuat trafik jaringan di 2 kebun macet. Penyebaran ini terjadi dari salah satu komputer yang terinfeksi (Win2K-SP4) virus, dan dalam tempo 30 menit (kurang lebih) menyerang Win XP SP1. Bersyukur hari ini sudah bisa ditangkal, baik disisi client (Win XP SP1) maupun di gateway (GNU/Linux)
Dari sisi client, disable [...]

Setting Cisco Router Ronald R Saragih

 
Kali pertama mengkonfigurasi Cisco Router, series lawas 805 - namun sudah mencukupi untuk kebutuhan - menghubungkan jaringan belitung dengan jaringan HO (VSAT).
Hal yang pertama dilakukan untuk mengkonfigurasinya adalah, dengan menghubungkan cisco router dengan pc/laptop, yang memiliki port COM{1,3} dengan memamfaatkan kabel console. Cisco router sendiri tidak bisa menampilkan isi konfigurasi, dibutuhkan Hyperterminal sebagai component tambahan/tools [...]

Penjelasan Singkat Tentang EIGRP from ghozali

EIGRP (Enhanced Interior Gateway Routing Protocol) adalah routing protocol yang hanya di adopsi oleh router cisco atau sering disebut sebagai proprietary protocol pada cisco. Dimana EIGRP ini hanya bisa digunakan sesama router cisco saja. Bgmn bila router cisco digunakan dengan router lain spt Juniper, Hwawei, dll menggunakan EIGRP??? Seperti saya bilang diatas, EIGRP hanya bisa [...]

Route Summarization in EIGRP from Ghozali

Summarization ini adalah membuat summary atau ringkasan secara manual dari beberapa Network yang mempunyai subnetmask or CIDR yang sama. Inget..!! subnetmask or CIDRnya harus sama..!!! It a Must.!!
Biasanya pada EIGRP, auto summary itu telah berjalan secara default. Misalnya, jika teman2 memasukkan IP 172.16.1.1/24 makan ter-auto summary menjadi 172.16.0.0 kembali ke asalnya (172.16.1.1 itu class B, [...]

Belajar Create VLAN dengan Ghozali

VLAN = Virtual Local Area Network

VLAN berguna untuk membagi broadcast domain, membagi berdasarkan job function atau departements tanpa memperhatikan lokasi dari si user dan di Setiap berbeda VLAN itu mempunyai traffic masing2.
Misalkan :
Di suatu gedung ada 3 tingkat, di gedung tersebut mempunyai banyak departemen (keuangan, produksi, IT, Penjualan dan HRD)
keuangan = [...]

Lab Frame Relay dengan dynamips from ghozali

Kali ini saya mencoba membuat tutorial meng-konfigurasi Frame Relay dari sisi client menggunakan simulator dynamips + dynagen di Linux Feisty saya. Bagi temen2 yang ingin menginstall dynamips di Linux, bs membaca ttg Install Dynamips dan dynagen di Linux. O iya, bagi teman2 yg krg tau ttg teori dari Frame Relay.. teman2 bs membaca dari blognya [...]

BGP Routing Setup with BGP Communities

This is meant to be an example, and not a complete BGP (Border Gateway Protocol) routing configuration.
Router Diagram
————————— ————————
| +————+ | | +————+ |
| AS [...]

The OSPF Routing Protocol

This document provides background information and an application guide to the Open Shortest Path First (OSPF) routing protocol. It highlights the features and benefits of OSPF, describes the Gated OSPF implementation, explains the difference between OSPF and the Routing Information Protocol (RIP), and describes typical OSPF applications. It is meant for managers and network administrators [...]

Load Balancing Using eBGP Multihop and Loopback IPs

This is meant to be an example, and not a complete BGP (Border Gateway Protocol) routing configuration.
Router Diagram
————————————- ————————
| +———————-+ | | +————+ |
| AS [...]

Using GateD to Pad (Prepend) the AS Path

This is meant to be an example, and not a complete BGP (Border Gateway Protocol) routing configuration.
Router Diagram
————————— ————————
| +————+ | | +————+ |
| AS [...]

Simple eBGP and iBGP Routing Setup

This is meant to be an example, and not a complete BGP (Border Gateway Protocol) routing configuration.
Router Diagram
————————— ————————
| +————+ | | +————+ |
| AS [...]

Simple BGP Routing Setup

This is meant to be an example, and not a complete BGP (Border Gateway Protocol) routing configuration.
Router Diagram
————————— ————————
| +————+ | | +————+ |
| AS [...]

Configuration example for Ethernet DSL with PPPoE

This sample configuration shows an ImageStream router connected to a Digital Subscriber Line aggregation circuit. Each PVC represents a DSL customer terminated on the router. Each PVC is connected to the router via an Ethernet circuit from a DSLAM.
|- RADIUS Server IP: 192.168.1.200
|
====ETHERNET===================== 192.168.1.0/24 ===
|
[...]

Configuration example for ATM DSL with PPPoE

This sample configuration shows an ImageStream router connected to a Digital Subscriber Line aggregation circuit. Each PVC represents a DSL customer terminated on the router. Each PVC is connected to the router via an ATM circuit from a DSLAM.
|- RADIUS Server IP: 192.168.1.200
|
====ETHERNET===================== 192.168.1.0/24 ===
|
[...]

Configuration example for RFC 1483 ATM DSL using SoftCell IMA

This sample configuration shows an ImageStream router connected to Digital Subscriber Line aggregation circuits bonded together using ImageStream’s SoftCell technology and Inverse Multiplexing for ATM (IMA) protocol. In this example, the IMA group includes 3 T1 lines. Each PVC represents a DSL customer terminated on the router. This example uses the “atm route-bridged ip” command. [...]

Configuration example for RFC 1483 ATM DSL

This sample configuration shows an ImageStream router connected to a Digital Subscriber Line aggregation circuit. Each PVC represents a DSL customer terminated on the router. This example uses the “atm route-bridged ip” command. This command automatically sets up a bridge group, binds the ATM subinterface to it. “atm route-bridged ip” also turns off the spanning [...]

Connecting an SSL VPN between an ImageStream Router and a Windows PC Using OpenVPN

ImageStream’s version 4.2 releases include support for the highly secure SSL VPN tunnels. A detailed explanation of basic SSL VPN configurations using the OpenVPN software on ImageStream routers is available in the ImageStream Router Installation Manual. The SSL tunnel interface mode for Inetics devices uses the OpenVPN suite and allows IP packet tunneling [...]

OpenVPN Server Configuration

ImageStream Linux version 4.2.7 includes support for the highly scalable OpenVPN client/server mode. This feature allows multiple clients to establish SSL VPN tunnels to the router using a single UDP or TCP port. It also allows the router in server mode to control IP address assignments and OpenVPN features that can be pushed to the [...]

DHCP Server Configuration

ImageStream Linux version 4.2.7 includes support for the Dynamic Host Control Protocol (DHCP). DHCP allows a router to automatically assign dynamic IP addresses from address pools to DHCP clients.
DNS Servers: 192.168.0.10, 192.168.0.11
DHCP Pool Range: 192.168.0.20 - 192.168.0.254

====ETHERNET===================== 192.168.0.0/24 ===
|
| [...]

Multilink PPP Quick Start and Examples

ImageStream’s Version 4.1.9 release includes support for the Multilink PPP (MLPPP) datalink protocol. MLPPP aggregates multiple physical WAN links into a single multilink bundle. Data is sequenced, split, and transmitted down the individual interfaces that are members of the multilink bundle. On the receive side the information is recombined and resequenced before being passed to [...]

Basic ATM Configuration

An ATM network represents two or more routers interconnected by ATM connections. Each router on the ATM network is connected to the ATM network by a Virtual Channel Connection (VCC). Each router is connected to a ATM switch that in turn connects to the ATM network. Each node on the ATM network is identified by [...]

Frame Relay Configuration

A Frame Relay network represents two or more routers interconnected by a Frame Relay cloud. Each router on the Frame Relay cloud is connected to the Frame Relay network that has a Permanent Virtual Circuit (PVC). The Frame Relay network is connected to a Frame Relay switch that in turn connects to the Frame Relay [...]

Configuration for Bridged LAN/WAN

Point-to-point numbered refers to connections where the interfaces connecting the routers to the WAN have IP addresses. On both WAN ports, the address of the WAN port is set to an IP address on a common IP network, and the destination addresses are set to the IP address of WAN port [...]

Configuration for Numbered WAN Point-to-Point

Point-to-point numbered refers to connections where the interfaces connecting the routers to the WAN have IP addresses. On both WAN ports, the address of the WAN port is set to an IP address on a common IP network, and the destination addresses are set to the IP address of WAN port [...]

Configuration for Numbered WAN Point-to-Point

Point-to-point numbered refers to connections where the interfaces connecting the routers to the WAN have IP addresses. On both WAN ports, the address of the WAN port is set to an IP address on a common IP network, and the destination addresses are set to the IP address of WAN port [...]

Configuration for Fractional DS3 Point-to-Point

This configuration describes a simple point-to-point fractional DS3 connection from an ImageStream 530 series DS3/E3 (531-DE, 532-DE) port to a Cisco PA-T3 port in a 7xxx series router. On both WAN ports, the address of the WAN port is set to an IP address on a common IP network, and the destination addresses [...]

Configuration for Unnumbered WAN Point-to-Point

Point-to-point numbered refers to connections where the interfaces connecting the routers to the WAN have IP addresses. On both WAN ports, the address of the WAN port is set to an IP address on a common IP network, and the destination addresses are set to the IP address of WAN port [...]

Configuration for Numbered WAN Point-to-Point

Point-to-point numbered refers to connections where the interfaces connecting the routers to the WAN have IP addresses. On both WAN ports, the address of the WAN port is set to an IP address on a common IP network, and the destination addresses are set to the IP address of WAN port [...]

Server Load Balancing Example

This is meant to be an example, and not a complete load balancing configuration.
Network Diagram
+—————————————-+
| Router 1 [...]

Routing Using Packet Marking

This is meant to be an example, and not a complete load balancing configuration.
Before You Start
IP network addresses are given to you by your Internet Service Provider, your leased line carrier, or by ARIN. If you do not plan to connect you network to the Internet, you can use an IP network address set aside [...]

Source Routing Example

This is meant to be an example, and not a complete load balancing configuration.
Network Diagram
+——————————————+
| Router 1 [...]

Building a DTE to DTE (Null Modem) Cable

This page provides information for connecting two asynchronous serial (RS-232) Data Terminal Equipment (DTE) devices together (example: two PC’s or a dumb terminal and a ImageStream router). Assuming both DTEs have DB-25 interfaces, each DTE transmits data on pin 2 and receives data on pin 3. Consequently, both DTE devices cannot transmit or receive data [...]

Blocking Nachi/Welchia Worm ICMP Scans

The recent W32/Nachi and W32/Welchia worms perform ICMP scanning in an attempt to identify systems for exploitation. Depending the the number of host infected on the network the ICMP scanning can result in unwanted increase of traffic. These scans could generate enough traffic to create delay on the upstream link(s) and disrupts users. Infected machines [...]

Limiting Peer to Peer Traffic

ImageStream routers support powerful packet matching and traffic limiting techniques in ImageStream Linux version 4.2 and later releases. This document provides examples of identifying and limiting Peer to Peer (P2P) traffic. More in-depth information about the capabilities of the iptables utility is available in other Technical Notes and on the Other On-Line Resources page on [...]

Implementing Quality of Service with iptables CLASSIFY rules

ImageStream’s version 4.2 releases include support for the iptables CLASSIFY directive, making quality of service configuration simpler and more flexible. Instead of using complex matches in the advanced traffic control (tc) utility, you can use ImageStream’s bwinit and bwadd utilities and the powerful iptables utilities to sort traffic into individual queues. In a default [...]

Chapter 1.1. Introduction To Network

# Internet dapat dibagi menjadi 3 yaitu:

Physical Connection

Dibuat dengan menghubungkan sebuah adaptor card (Modem, NIC) dari PC ke sebuah jaringan.
Contohnya : NIC (Network Interface Card) Modem (Modulator Demulator)
2. Logical Connection
Menggunakan sebuah standar yang di sebut protocol.
Protocol adalah suatu set aturan yang menentukan bagaimana device-device dalam jaringan berkomunikasi antar PC, Contohnya TCP/IP
3. Aplication
Mengimpresentasikan [...]

Contoh Konfigurasi Cisco Seri Bisa Voip

FBI_CIA#sh run
Building configuration…
 
Current configuration : 2661 bytes

LAN switch

LAN switch types decide how a frame is handled when it’s received on a switch port. Latency— the time it takes for a frame to be sent out an exit port once the switch receives the frame— depends on the chosen switching mode. There are three switching modes:

Spanning Tree Protocol (STP)

Spanning Tree Protocol (STP)
Back before it was purchased and renamed Compaq, a company called Digital Equipment Corporation (DEC) created the original version of Spanning Tree Protocol (STP) . The IEEE later created its own version of STP called 802.1D. All Cisco switches run the IEEE 802.1D version of STP, which isn’t compatible with the [...]

Layer 2 Switching

Layer 2 Switching
When Cisco discusses switching, they’re talking about layer 2 switching unless they say otherwise. Layer 2 switching is the process of using the hardware address of devices on a LAN to segment a network. Since you’ve got the basic ideas down, I’m now going to focus on the particulars of layer [...]

Encrypting Your Passwords (Continued)

Encrypting Your Passwords (Continued)
Because only the enable secret password is encrypted by default, you’ll need to manually configure the user-mode and enable passwords for encryption. Notice that you can see all the passwords except the enable secret when performing a show running-config on a router: