> Source: [sk166899](https://support.checkpoint.com/results/sk/sk166899)

# sk166899 - "Delivery Optimization for Windows 10" Update causing Remote VPN latency

| Property | Value |
|----------|-------|
| Solution ID | sk166899 |
| Date Created | 2020-05-29 |
| Last Modified | 2021-09-13 |
| Technical Level | General |
| Products | Endpoint Security |
| Versions | Cloud, E89.X, E88.X |

## Symptoms

- * Interface CPU (SND) using high amount of CPU, while *fw_worker* is low.
* SmartView Tracker / SmartLog shows high amounts of VPN routing traffic for port 7680
* CPView shows high CPU usage for port 7680, and showing the protocol as 'pando-pub'
* High amounts of Remote Access / Mobile Access VPN users use Windows 10

## Cause

Microsoft introduced a peer-to-peer Windows update protocol, by default, on Windows 10.   

This protocol reaches out to all other Windows 10 users on the same network to fetch Windows updates. This causes a high amount of traffic over the VPN tunnel when users login all at the same time, as every client reaches out to every other client on the same VPN network.

<br />

## Solution

**Microsoft issue and not a Check Point issue.**   

Disable the Delivery Optimization for Windows 10 Update. Details can be found below:  

* <https://community.spiceworks.com/topic/2090731-wudo-blowing-up-tcp-port-7680-on-syslog-server>
* <https://docs.microsoft.com/en-us/windows/deployment/update/waas-delivery-optimization>

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