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- Configure lines and VTYs on Cisco routers
- All Cisco routers have two special types of lines, and many Cisco routers have a third. What are these lines, and how do you configure them? These are things that every network admin should know. What are the different types of lines on Cisco routers? "Lines" on Cisco...
- Tags: Cisco Router, Console, Router, History, Cisco Systems Inc., VTY, Router#, AUX, Routers & Switches, Network Technology, Networking, David Davis
- Blog posts 2007-12-13
Additional Resources
- Help on CISCO 2821 router
- I have been locked out of console and vty lines after entering the following commands, line con 0 exec-timeout 5 0 logging synchronous no exec i also entered the same command on the vty lines and have configured no address for ethernet interface.I have been...
- Tags: Routers & switches, Network technology, NETWORKING, nickolaskoiser@..., Cisco Systems Inc., router
- Discussion threads 2007-10-24
- Telnetting
- I want to telnet my main router only from one machine and disable other machines. How do I do this. I have a cisco 1700 series router and only MS platforms.If you want to allow only certain IP addresses to use Telnet to access the router, you must use the...
- Tags: it management, password, rajivnarayanan@..., router
- Q&A 2004-11-24
- Basic access security for Cisco network devices
- Network admins who employ Cisco routers for security might be overlooking the most obvious security threat: access to the router itself. Robert McIntire shows you how to protect the devices on your Cisco network.To secure their Cisco networks, many administrators first address what traffic will be allowed to pass through...
- Tags: Routers & switches, Network technology, NETWORKING, security, network device, Robert McIntire, password, router, Cisco Systems Inc.
- Technical articles 2001-11-01
- Handle basic password management on your Cisco router
- The Cisco Certified Network Associate CCNA is a coveted certification, and for good reason: It takes a considerable amount of knowledge to earn it. But you don't have to be an expert to complete basic router administration. In fact, once you become familiar with the two modes of operation and...
- Tags: Cisco Router, Cisco Systems Inc., Enable Secret password, Louis Nel, password, password management, router
- Technical articles 2003-06-09
- access cisco router via ssh
- i have configured cisco IOS with ssh:ip domain-name tech.comcrypto key generate rsahow do i access router thru ssh now.i have been using telnet uptill but now i want to user ssh. so i need special software on my PCIv been using an application called Putty. It is free and runs...
- Tags: SSH, kamal.yadav@..., security, Cisco Systems Inc., PuTTY, router
- Q&A 2006-06-02
- Protect your network from this Telnet vulnerability
- Make sure you secure your network from Telnet-based attacks by creating a first line of defense. This tip tells you how to add an access list to your router. Worried about security issues? Who isn't? Automatically sign up for our free Security Solutions newsletter, delivered each Friday, and get...
- Tags: Telnet, Routers & switches, Network technology, NETWORKING, TCP/IP, Michael Mullins CCNA, MCP, network, router, Security Solutions Newsletter, Vulnerability, TCP, Network Device, Michael \"Mullins CCNA, MCP\"
- Technical articles 2005-01-27
- CCNA-OSPF HELP....
- Hello all, I'm currently in my 3rd sim studying for my CCNA. I have a home lab but I'm having troubes setting up ospf. Heres my layout. 2 routers: 3620, and 2503. 1 switch 2900 3 PCs. I have all the connections pinging execpt the PCs. All interface ports including...
- Tags: Network technology, Routers & switches, NETWORKING, chrisnett@..., IP, router, Open Shortest Path First, PC
- Discussion threads 2007-03-31
- Setting passwords on a Cisco router
- Network security relies heavily on passwords. Cisco routers use passwords to ensure that only "trusted" users can perform certain services. In this Daily Drill Down, Todd Lammle takes you on a journey through Cisco passwords.In this Daily Drill Down, I will focus on a great way to ensure basic security...
- Tags: Routers & switches, Network technology, NETWORKING, network security, Todd Lammle, router, password, Cisco Router, Cisco Systems Inc., user mode, Telnet, console
- Technical articles 2001-05-01
- Cisco router configuration (mpls)
- Hello,I'm learning how to configure Cisco routers to enable bgp/mpls VPNs and I have a few questions.- As long as I read, IOS has support to MPLS since version 12.1. I have a router 1721 with IOS 12.3. I was trying to configure MPLS, but the router doesn't recognize mpls...
- Tags: Network technology, NETWORKING, Routers & switches, Telnet, Cisco Router, fmherr@..., MPLS, router, Cisco IOS, Cisco Systems Inc.
- Discussion threads 2007-09-01
- Use Zebra to set up a Linux BGP/OSPF router
- See how to install, set up, and use Zebra to build a Linux system that can serve as an OSPF and BGP router.You’ve no doubt heard of routers from giants such as Cisco and Nortel, but what about Linux? While Linux has become an increasingly viable option as a server,...
- Tags: Routers & switches, Network technology, NETWORKING, UNIX, OPEN SOURCE, Thomas Nooning CCNA, CCDA, router, Zebra, Linux, BGP, Open Shortest Path First
- Technical articles 2002-03-19
- Cisco 857 and Cisco 5505 ASA in series
- HiI have now been working on Cisco equipement for a grand total of about 2 weeks. Hence I don't really know what I'm doing.I want to make my Cisco 857 Router transparent, so that the Cisco 550 firewall has the external IP address, given to me from my ADSL connection.My...
- Tags: NETWORKING, Network technology, jking_007@..., IP, PPP, Cisco Systems Inc.
- Discussion threads 2007-10-19
- Router Configuration 101: Configuring and securing the router
- This three-part series reviews the basics of setting up a Cisco router. Part 1 discussed how to boot up your new Cisco router and explained the various router modes. Now, find out how to secure the router with passwords, apply IP addresses to interfaces, and enable those interfaces for use....
- Tags: IP, Routers & switches, Network technology, NETWORKING, David Davis CCIE, MCSE+I, SCSA, router, Cisco Routers and Management Newsletter, Password, Cisco Router, IP Address, Interface, Keyword, Global Configuration Mode
- Technical articles 2005-03-10
- Cisco administration 101: Learn 10 commands to configure on a new router
- When it comes to configuring a new Cisco router, much of the configuration depends on what type of router it is as well as the purpose it will serve. However, every administrator has his or her own list of commands they use to configure every router "just right." This week,...
- Tags: Cisco Systems Inc., Routers & switches, Network technology, NETWORKING, David Davis CCIE, MCSE+I, SCSA, router, password, Cisco Routers and Management Newsletter, Administration, David Davis
- Technical articles 2005-10-13
- Cisco 871W
- I recently purchased a 800 series 871W router.I am planning to have a lan party for halo 3 in the near future, but i am having problems using systemlink over the wireless interface.The wired to wired nodes can connect to each other through the lan perfectly. But when i try...
- Tags: Firewalls, Network technology, NETWORKING, Network security, Cisco Systems Inc., nhurta@..., IP, firewall, UDP
- Discussion threads 2007-09-13
- Routing over async dte/dce
- I have a home lab I'm setting up but I can't seem to route over my serial connection. I can ping 172.16.3.1 (and 2.1) from the R1 router. I can not ping those addresses from my PC (network 172.21.1.0 connected to the interface 172.21.1.254 via a switch). ...
- Tags: Network technology, NETWORKING, mtg@..., IP, dce-terminal-timing-enable, Open Shortest Path First, R2 172.16.3.1, IP address, IS-IS
- Discussion threads 2007-09-16
- System Link Xbox's using Cisco equipment
- I recently purchased a 800 series 871W router.I am planning to have a lan party for halo 3 in the near future, but i am having problems using systemlink over the wireless interface.The wired to wired nodes can connect to each other through the lan perfectly. But when i try...
- Tags: Firewalls, Network technology, NETWORKING, Network security, Cisco Systems Inc., nhurta@..., IP, firewall, UDP
- Discussion threads 2007-09-13
- Replace Telnet with SSH to shore up secure connections
- If you're using Telnet to control network devices, you should consider switching to something more secure. Mike Mullins tells you how to replace Telnet with Secure Shell SSH. Using Telnet, a TCP/IP protocol for accessing remote computers, to control your network devices is comparable to shouting your...
- Tags: Telnet, SSH, Routers & switches, Network technology, NETWORKING, Michael Mullins CCNA, MCP, router, Security Solutions Newsletter, Mike Mullins, Michael \"Mullins CCNA, MCP\"
- Technical articles 2005-10-13
- Configure Cisco 2509 to provide console access
- I am trying to figure out how to configure a Cisco 2509 to provide console access to another router and a Sun Ultra 1. Here is a copy of my current config:Current configuration:!version 10.3service udp-small-serversservice tcp-small-servers!hostname 2509!enable secret 5 $1$5ZqH$u6xk4T2Nbn3q/sP/NhSRD1enable password xxxxxxxxx!!interface Loopback0 ip address 172.21.1.1 255.0.0.0!interface Ethernet0 ip address...
- Tags: cisco, Cisco Systems Inc., console, eric@..., flush-at-activation, IP, networking, password
- Discussion threads 2005-10-16
- Cisco router access control methods
- Network downtime can be costly. Any means to avoid this is critical and Cisco offers many. Here Jeff Brady explores various methods of access control on Cisco routers, which can protect your network from costly downtime.Routers are an integral part of most any modern internetwork. The cost of the hardware,...
- Tags: Routers & switches, Network technology, NETWORKING, Cisco Router, access control, Cisco Systems Inc., Jeff Brady, router, Telnet
- Technical articles 2001-02-14
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