Skip to content

Meta

  • Register
  • Log in
ItsyourIP.com

Your gateway to Internet

Primary Navigation Menu
Menu
  • About
  • Contact Me
  • Free Antivirus
  • Free Firewall
  • Sitemap

admin (Page 2)

How to create VLAN Interfaces for InterVLAN Routing in Cisco IOS

2008-07-01
By: admin
In: Cisco
Tagged: Cisco, cisco-switch, InterVLAn-Routing, ios, router, switch, vlan

VLAN Interfaces are required in network scenarios where you have different VLANs and need Inter-VLAN switching on Layer3 (Routing capable) switches. Every VLAN that needs to be routed should have a VLAN interface. Let’s say we have VLAN 10 which hosts the subnet 192.168.10.0 subnet, VLAN hosts 192.168.20.0 subnet and VLAN 30 hosts 192.168.30.0 subnet. For Inter-VLAN routing to work, we need to have a VLAN interface setup for each of these VLANs and configured with an IP address from the same subnet which will be the default Gateway for that subnet. Lets say, 192.168.10.254,192.168.20.254.192.168.30.254 are the IP addresses for VLAN Interfaces of VLAn 10,20,30Read More →

High CPU usage when SNMP is enabled in Cisco Routers

2008-06-19
By: admin
In: Cisco
Tagged: Cisco, CPU, High, ios, process, router, snmp, switch

Cisco Routers and Switches with L3 routing functions are seen to have problems with High CPU usage when SNMP is enabled. This can range anything from 15% to 40%. According to Cisco, these are low priority processes and other priority processes requiring CPU cycles are given priority over these processes and this level of CPU utilisation can be is normal. However, it is always better to be safe than sorry and get the CPU utilisation caused by SNMP to bare minimum so as to ensure the Routers function smoothly. The reason behind the High CPU usage can be caused by the Network Management Server (SNMPRead More →

Import WyseTerm Host List from one user to another in Windows

2008-06-17
By: admin
In: Networking
Tagged: export, hostlist, hummingbird, remote-host, Wyseterm

Back from the holidays only to find my Windows Profile gone missing at work. One of the annoying things was to add all my remote hosts back onto WyseTerm. While the bad news is that there is no single file (which one would expect) that maintains this list, the good news comes in the form of Windows Registry. Yes, the WyseTerm host information is stored in Windows Registry and can be exported from the registry on to a new profile or other users profile. The WyseTerm Host information, also known as the Common Address Book can be exported from the Windows Registry and then importedRead More →

Configure MD5 encrypted passwords for users on Cisco IOS

2008-05-20
By: admin
In: Cisco
Tagged: Cisco, encryption, ios, MD5, password, Security

The enhanced password security in Cisco IOS introduced in 12.0(18)S allows an admin to configure MD5 encryption for passwords. Prior to this feature the encryption level on Type 7 passwords used a week encryption and can be cracked easily and the clear text password (type 0) as anyone would know is completely insecure. Anyone who can gain access to the privilege mode can view/decrypt these passwords.Read More →

Enable/Configure DHCP Snooping in Cisco Catalyst Switches (IOS)

2008-05-15
By: admin
In: Cisco
Tagged: Cisco, denial-of-service, DHCP, DHCP-Snooping, ios, Option82, Security

DHCP snooping is a DHCP security feature that provides security by filtering untrusted DHCP messages and by building and maintaining a DHCP snooping binding table. An untrusted DHCP message is a message that is received from outside the network or firewall causing denial of service attacks. The DHCP snooping binding table contains the MAC address, IP address, lease time, binding type, VLAN number, and interface information that corresponds to the local untrusted interfaces of a switch. An untrusted interface is an interface that is configured to receive messages from outside the network or firewall. A trusted interface is an interface that is configured to receiveRead More →

Allow user view Running/Startup-Config (red-only) in Cisco IOS

2008-05-12
By: admin
In: Cisco
Tagged: Cisco, ios, privilege, read-only, running-config, startup-config

If you want to allow a low-priviledged user on a Cisco router or a Switch to view the Startup Config then this can be done in Routers and Switches running Cisco IOS. This infact is a simple 2 step procedure as follows:Read More →

How to capture text, backup configuration (Cisco,Juniper or anything)with Putty

2008-05-07
By: admin
In: Cisco, juniper
Tagged: backup, Cisco, config, hyperterminal, ios, juniper, netscreen, Putty, restore

I dont think we need an introduction to the most widely used Remote console utility, PUTTY. Putty support SSH, Telnet, RLogin & RAW connections. If you telnet or SSH to your Cisco IOS routers or switches or Juniper Firewalls and ofcourse anything that support CLI and SSH or Telnet then one of the things you would prefer to do is to take a backup of the config (Running or Startup) or even capture session text including logs tech information etc. We discussed here about using Hypereterminal to capture text and hence backup and restore config on Cisco IOS Routers and Switches.Read More →

Posts navigation

Previous 1 2 3 … 26 Next



Categories

  • ARP
  • Browser
  • Cisco
  • Database
  • Debian
  • DHCP
  • DNS
  • DNS Records
  • Firefox
  • internet-explorer
  • IP Tools
  • juniper
  • Linux
  • MySQL
  • Network Inventory
  • Networking
  • OpenSource
  • OpenSource Clustering
  • Opensource Firewall
  • OpenSource LoadBalancer
  • Opensource NAC
  • OpenSource Router
  • Opensource VPN
  • proxy
  • Python
  • Redhat
  • Secure Shell(SSH)
  • Security
  • Security Audit
  • Security/Penetration Testing
  • Sniffing/PacketCapture
  • Solaris
  • Tools
  • Ubuntu
  • Unix
  • VirtualBox
  • voip
  • vpn
  • Windows
  • Wireless

Tags

acl Browser Cisco DHCP DNS DNS Records encryption Firefox firewall gateway High-Availability icmp internet ios ip ip-address ipsec IP Tools juniper Linux mtu network OpenSource Opensource Firewall OpenSource LoadBalancer proxy Redhat registry rhel route router routers Security snmp Solaris switch tcp tcpip udp Unix virtual-server vlan vpn Windows Wireless

Recent Posts

  • MySQL: how to delete all records from a table
  • Python: Remove last ‘n’ characters of a string
  • How to block select in PuTTY
  • How to enable/disable Right-click paste in PuTTY
  • How to change the HOST key in Oracle Virtualbox Manager
  • FileZilla FTP Client configuration through BlueCoat proxy
  • Unable to delete Stale/Obsolete statc routes in Cisco IOS
  • How to create VLAN Interfaces for InterVLAN Routing in Cisco IOS
  • High CPU usage when SNMP is enabled in Cisco Routers
  • Import WyseTerm Host List from one user to another in Windows

RSS Secunia Advisories

RSS MS Security Bulletin

RSS US-CERT Vulnerability

RSS SANS

Recent Comments

  • Forwarding ICMP over a server without redirects on How to Disable ICMP Redirects in Linux for security (Redhat,Debian,Ubuntu,SuSe tested)
  • M.Pasha on How to Disable ICMP Redirects in Linux for security (Redhat,Debian,Ubuntu,SuSe tested)
  • Steve Pollard on How to prevent VLAN Hopping in Cisco Switches
  • Routing issue Sophos UTM Home <-> Cisco ASA 5510 for only linux hosts? - Sophos User Bulletin Board on How to Disable ICMP Redirects in Linux for security (Redhat,Debian,Ubuntu,SuSe tested)
  • BranchCache – Hosted Cache Mode File Server Tutorial | theezitguy on HowTo: Add persistent Static Routes in Windows

Designed using Responsive Brix Premium. Powered by WordPress.