The cons of split tunneling: security compromises It lets VPN users direct their non-corporate traffic out to the internet without involving the corporate links or equipment. Split tunneling was invented largely to solve these problems. If you try to print, the packets get encrypted and forwarded out of your local network, off to a remote network that doesn’t know how to reach your printer. The other big disadvantage to tunneling everything is it prevents your computer from talking to your printer or other local devices. And it’s a detour that probably means packets having nothing to do with the corporate network are traversing that same corporate internet link twice-it’s slower, it causes congestion, and it’s a nightmare for your network monitoring solution to have to parse. That’s a big detour for packets that are heading back out to the public internet. And if you’re streaming a movie or taking part in a video conference, then that’s potentially a lot of packets getting encrypted and sent through the VPN. Though your connection to the server inside your corporate network must use the VPN just to get access, your web browsing and online banking really don’t. Think of the alternative- if everything has to pass through the VPN tunnel. One of the major advantages to split tunneling is it represents the best of both worlds: the speed and performance of an unencrypted link, but the data security when and where you need it. The pros of split tunneling: speed and performance Less an option and more a situation to be aware of: If you are running VPN and able to access both IPv4 and IPv6 addresses from your connection, it’s common that your IPv6 data could be going out unencrypted. Dual-stack networking (unintended split tunneling).While traditional split tunneling relies on ACLs to decide traffic that’s included or not in the tunnel, dynamic split tunneling enhances that by using a DNS protocol to decide what traffic/protocols and domains are included or not. With inverse tunneling, it’s the exact opposite: all data is sent through the tunnel, except the specific sources (like web browsing) you identify to be routed directly to the internet. In a normal situation, only specified data is routed through your VPN, like data bound for sensitive internal destinations. ![]() What are the different types of split tunneling?īeside the standard method explained above, there are three general variants when it comes to split tunneling: Without a VPN, that packet would have taken a different, more direct path to the destination.Ī data packet vs. The original packet is extracted and decrypted, and sent along its way to the ultimate destination, looking like it had only gone one hop instead of the dozens of hops an encrypted packet will actually travel. But with a VPN, the packet is sent first in encrypted form to a VPN termination point. Without a VPN, it will send that packet out into the network and let it hop from device to device until it reaches the destination. Say your computer has a packet that it wants to send to a remote device. We use the term remote access here to distinguish between this type of connection and site-to-site VPNs, where network devices are connecting directly to each other.Īll VPN types are a network “tunnel”. It’s mostly relevant for remote access-type VPNs (probably like your work from home set up) where your computer is connected directly to a remote network at your office. Put simply, split tunneling is routing some of your data through an encrypted VPN connection, while allowing other apps and data direct access to the internet.
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