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When a SNIP address is configured, a corresponding route is added to the NetScalers routing table, which is used to determine the optimal route from the NetScaler to the internal network. The NetScaler has a mode named USNIP (Use SNIP), which is enabled by default, this causes the SNIP address to be used as the source address when sending packets from the NetScaler to the internal network.
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It is mandatory when setting up and configuring the NetScaler for the first time, there can only be one NSIP address, it can not be removed and when it’s changed you will have to reboot the NetScaler.Ī SNIP (Subnet IP Address) is used for server side connections, meaning that this address will be used to route traffic from, or through, the NetScaler to a subnet directly connected to the NetScaler. The NSIP address (NetScaler IP Address) is the IP address which is used by the Administrator to manage and configure the NetScaler. Just remember that you can configure multiple independent vServers on the same NetScaler serving different purposes, like a load balancing or SSL offload vServer for example. The NetScaler uses vServers (virtual servers) to deliver different kinds of services, in this case the vServer will be configured as a gateway server. As such it is physically placed within our DMZ, or Demilitarized Zone in full, where it sits in between the Internet and our secure corporate LAN fronted by at least one or two firewalls as shown in the overview below (got this from ).īefore I show you how traffic flows and what actually happens when a external user connects up to the NetScaler Gateway, I first want to spend a few minutes explaining some of the terminology you need to know and understand before we continue. NetScaler ADC’s are capable of doing much more than ‘just’ remote access, they can be used for load balancing and HA, content switching, application (SSL) offloading, application firewalling, cloud connectivity, hybrid cloud solutions and (a lot) more.Īs mentioned, the NetScaler Gateway is used and configured to provide our users with secure remote access into our secure corporate network.
MAP COM PORT CITRIX POLICY LICENSE
You basically buy a ‘normal’ NetScaler but with limited functionality due to the NetScaler Gateway License you upload. Most of the confusion starts with the terms Citrix NetScaler and Citrix NetScaler Gateway, although they sound very similar, and they do have a overlap, there are some distinct differences depending on the licenses used.Ĭitrix NetScaler refers to their Application Delivery Controller, or ADC, line of products, while the NetScaler Gateway, formerly know as the Citrix Access Gateway, or CAG, is primarily used for secure remote access. Make sure to check out my book: Inside Citrix – The FlexCast Management Architecture! It includes information from this blogpost and a (whole) lot more! Click hereīefore we continue, first a short word on the two NetScaler editions available today. Citrix NetScaler… The basics continued, part seven.Citrix NetScaler… The basics continued, Part six.Citrix NetScaler… The basics continued, part five.Citrix NetScaler… The basics continued, part four.Citrix NetScaler… The basics continued, part three.Citrix NetScaler… The basics continued, part two.Citrix NetScaler… The basics continued, part one.This (the Gateway edition) is probably one of the most popular NetScaler implementations today, although, and as you might know, the NetScalers ADC edition also has the Gateway functionality build-in and can provide us with a bunch of additional features as well. Throughout this article I’d like to briefly focus on some of the basic terminology and traffic flow that comes with the NetScaler Gateway edition providing our users with secure remote access. I don’t want to spend to much time talking about the different kinds of editions and or licenses available, if you want to know about those I suggest you check out one of my previous articles here, or just give a visit.