Network Analyst

Command : Passive Interface in RIP, EIGRP & OSPF

2010-12-21T01:12:00.001+05:30

Passive-interface command is used in all routing protocols to disable sending updates out from a specific interface. However the command behavior varies from one protocol to another.

In RIP: this command will disable sending multicast updates via a specific interface but will allow listening to incoming updates from other RIP speaking neighbors.

[Simply router can able to receive updates on that passive interface and use them in the routing table but it will never sends any update through that specific interface.]

In EIGRP: this command stops sending outgoing hello packets, hence the router can not form any neighbor relationship via the passive interface. [Simply it will never send & receive any routing updates to neighbors.]

In OSPF the passive-interface has a similar behavior to EIGRP. The command suppresses hello packets and hence neighbor relationships.

Note : Incase of any suggestion,pls let us know...

IP Momentum VoIP Ports

2010-06-12T12:00:00.000+05:30

IP Momentum VoIP uses the below ports for communicate the Voice/Account related to ISP/Account Providers,

TCP - 80,8080,9090

UDP - 5060, 5061, 6070, 6071, 17090 to 17100 , 9000 to 9006 , 10000 to 10006 , 20000 to 22000

http://netanalyst.blogspot.com/p/voip.html

Router Servers & other BGP\Tools

2010-05-22T10:43:00.000+05:30

http://www.traceroute.org/#Route%20Servers

Cisco ASA 5500 Configuration Register Values

2010-05-04T05:24:00.002+05:30

Syntax:

******

configuration-register value

Examples:

*********

0x01 - ASA default value
0x41 - ASA ignore startup configuration on next reboot (used for password recovery)

http://netanalyst.blogspot.com/p/cisco-asa.html

Performing Password Recovery for the ASA 5500 Series

2010-05-04T05:06:00.000+05:30

http://netanalyst.blogspot.com/p/cisco-asa.html

http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/trouble.html#wp1049302

Cisco Routers Configuration registers Value

2010-05-04T04:53:00.001+05:30

Cisco Routers Configuration registers Value

************************************

The configuration register is a 16 bit (2 Byte) value
The value range is from 0x0 to 0xFFFF.
0x2102 is the factory-default configuration register value.
0x2142 boots from flash without using NVRAM contents good for password recovery.
0x2101 boots from boot prom image not flash, good for upgrading image on flash.
0x2141 boots from boot prom and ignores NVRAM contents.
0x141, which disables the Break key, ignores the NVRAM configuration, and
boots the default system image from ROM.

http://netanalyst.blogspot.com/p/cisco-routers.html

http://www.cisco.com/en/US/products/hw/routers/ps133/products_tech_note09186a008022493f.shtml#config-reg-meaning

Cisco VPN Client

2010-04-23T22:40:00.001+05:30

Latest Cisco VPN Client version is as mentioned below,

Windows 32-bit: vpnclient-win-msi-5.0.07.0290-k9.rar

Windows 64-bit: vpnclient-winx64-msi-5.0.07.0290-k9.rar

Split Tunnel - Cisco ASA

2010-04-20T01:30:00.000+05:30

Split tunnel concept in Cisco ASA IPSec VPN, pls go through the Cisco ASA Page,

http://netanalyst.blogspot.com/p/cisco-asa.html

Cisco PIX & ASA

2010-04-17T13:57:00.000+05:30

Pls check the Cisco ASA Page in this blog for Cisco PIX and ASA differences,

Cisco PIX:

********

http://cisco.com/en/US/products/hw/vpndevc/ps2030/index.html

Cisco ASA:

*********

http://cisco.com/en/US/products/ps6120/index.html

http://cisco.com/en/US/products/ps6120/prod_models_comparison.html

Cisco devices Password Recovery procedure

2010-04-17T12:37:00.002+05:30

Cisco devices Password Recovery procedure,

**************************************

Below link will helpful to know the Cisco devices such as Routers, Switches, Firewalls, VPN Concentrators and wireless devices.

http://www.cisco.com/en/US/products/sw/iosswrel/ps1831/products_tech_note09186a00801746e6.shtml

Cisco Router/Switch Type 7 Password Cracker

2010-04-16T18:10:00.004+05:30

To Crack the Cisco Type 7 Password Many ways available, below i mentioned only one way, for this many third party software tools & links available,

http://www.ifm.net.nz/cookbooks/passwordcracker.html (Direct Link)

http://www.winagents.com/en/products/cisco-password-recovery/ (Software Based)

IGRP and EIGRP Comparison

2010-04-13T01:42:00.003+05:30

Building Scalable Cisco Internetworks Volume 3 (Cisco Training and Certification, Student Guide Version 2.0)

Interior Gateway Routing Protocol

******************************

· Cisco proprietary Protocol

· Classful

· Doesn’t support VLSM

· Equal cost balancing by default

- Use Variance command for unequal cost balancing

· Broadcast updates to 255.255.255.255 every 90 secs

· Uses Bellman-Dord Algorithm

· It's only support for Cisco devices.

Enhanced Interior Gateway Routing Protocol

***************************************

· Cisco proprietary Protocol

· Classless

· Supports VLSM

· Equal cost balancing by default

- Use Variance command for unequal cost balancing

· Uses DUAL Algorithm

· Multicasts its updates to 224.0.0.10

· Sends updates upon adjacency and when the network topology changes

· It's only support for Cisco devices.

RIPv1 and RIPv2 Comparison

2010-04-13T01:41:00.004+05:30

RIPv1 (Routing Information Protocol Ver.1)

**************************************

· Classful

· No VLSM Support

· Doesn’t support routing update authentication

· Update packets contains entire RIP routing table

· Updates carry 25 routes maximum

· Equal cost load balancing by default – 4 paths

· Broadcasts its updates to 255.255.255.255 every 30 seconds

RIPv2 (Routing Information Protocol Ver.2)

**************************************

· Classless

· VLSM Support

· Does support routing update authentication

· Multicast its updates to 224.0.0.9

OSPF DR Election

2010-03-30T02:59:00.004+05:30

OSPF DR Election:

***************

DR and BDR election is done via the Hello protocol. Hello packets are exchanged via IP multicast packets on each segment. The router with the highest OSPF priority on a segment will become the DR for that segment. The same process is repeated for the BDR. In case of a tie, the router with the highest RID will win. The default for the interface OSPF priority is one. Remember that the DR and BDR concepts are per multi-access segment. Setting the ospf priority on an interface is done using the following interface command:

ip ospf priority

A priority value of zero indicates an interface which is not to be elected as DR or BDR. The state of the interface with priority zero will be DROTHER.

OSPF Building the Adjacency & Troubleshooting Tips,

2010-03-30T02:52:00.000+05:30

OSPF Building the Adjacency states:

Down
Attempt
Init
Two-Way Handshake
Exstart
Exchange
Loading
Full

Welcome to the Network Analyst Blog

2010-03-15T22:54:00.012+05:30

Welcome to the Network Analyst Blog,

How to know the public IP Address/BGP AS/Domain registered in the world?

Below mentioned website will help you to find the above queries,

http://www.iana.org/

Root server IP: 12.0.1.28

Tech Tips