jump server

What is Jump Server and Why we need to use it?
taazAsked:
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roemelboemelConnect With a Mentor Commented:
It's a server you use to "jump" onto other servers were you don't have access directly.
For example you open for one server the ssh server to be access from the internet. So you can log on to this server from everywhere and then log on ("jump") to other servers on your network which can't be reached directly from the internet.
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arnoldConnect With a Mentor Commented:
Adding to roemelboemel's comment, a jump server provides two things at the lowest possible expense.
1) A means to reach any internal system from an external source without having to punch many firewall holes for each server.
2) To achieve the 1st, security mechanisms have to be implemented on the jump server i.e. two factor authentication as well as maintaining the server up-to-date with security updates. etc.
The cost would be prohibitive as well as the administration/management made more complex if each server had to undergo this security setup.
At times even with a VPN connection one has to go through a jump server to get to other systems this is at times a means of maintaining an audit trail as well as a way to limit access to server.
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taazAuthor Commented:
Thanks for quick response. very clear.
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