Split-tunnel VPNs—friend or foe?
Virtual private networks (VPNs) provide security when remote workers access corporate networks, but they’re notoriously slow. Backhauling all traffic for all remote users through the corporate data center just isn’t practical when work from home really starts to scale. Fortunately, VPNs can be configured to operate in more than one way.
Today, most organizations—regardless of size—use some combination of on-premises and public cloud computing. This means that some requests need to go to one or more corporate data centers, while some need to find their way to the Internet.
Traditional VPNs send all requests—both corporate-bound and Internet-bound—through the corporate network because that’s where the corporate information security defenses are located. Today, this approach is causing significant performance problems.
Scaling …
The most popular traditional solution to the problem of VPN performance problems was to just buy a bigger router or firewall. The overhead of the VPN tunnel on throughput isn’t that large, and many traditional corporate applications weren’t latency sensitive. This meant that performance problems usually occurred because the device where the VPNs terminated—the router or firewall—just didn’t have enough processing power to handle the required number of concurrent sessions at the current level of throughput usage.
Times have changed, Continue reading

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