When you need to connect a cisco router or a switch to a windows machine you can use the windows default dialer called hyperterminal. But connecting your cisco router or a switch can be hassle as there is no default dialer present in linux.
When you start studying for cisco ccna exam the only thing that bothers you is the practice lab.There are several simulators available in market to simulate cisco ccna labs .The simulator which i use is GNS3.The GNS3 allows you to simulate any network for practice labs and the main advantage is that it uses real cisco IOS. You can find out about GNS3 and how to configure it from my previous article Step By Step Using And Configuring GNS3 Cisco Router simulator..The first cisco ccna lab that we are going to perform is static routes .I have access to physical cisco hardware but i will be providing you a GNS3 simulator file also . Lets start up by configuring some static routes on cisco routers and get one more step closes to your ccna certification.
How to Setup SSH Access on a Cisco Router for Security
Telnet connections is not secure the data sent via telnet can be read by a packet sniffer and decoded so it is a security breach . We should avoid using telnet at all the times . we can enable ssh on cisco routers
We need to login to global configuration mode. The first criteria is to set a domain name and hostname of the router on the basis of which the RSA key is generated.
By default cisco routers are not secured they don’t have any passwords set on them anyone within your network can connect to a cisco router and make changes . Which is a security breach and a threat to your network . How can cisco people be so careless that they do not have passwords enabled .
Hello readers this question goes through mind of everyone who is appearing or wants to appear for any of the cisco
certification …. Now question comes that can everything be practiced on Simulators … hmmm
quite a big question but the answer is not . Simulators are very good way to start your path towards cisco but in the end to
gain real knowledge you need to have hands on some hardware . It is not possible for everyone to get a router though they are cheap on ebay but still costs some money which everyone can’t afford .
The initial ccna exam can be cleared almost without purchasing any real hardware but if you want to make your career into cisco you need to have hands on some hardware .