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How to Configure WinHTTP Proxy for Veeam Components

KB ID: 3090
Product: Veeam Backup & Replication
Veeam ONE
Veeam Agent for Microsoft Windows
Veeam Cloud Connect
Published: 2020-01-20
Last Modified: 2024-03-13
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Known Limitation
A tenant's Veeam Backup & Replication server cannot access Veeam Cloud Connect infrastructure components through HTTP/HTTPS proxy servers. All cloud-targeted traffic from the tenant's Veeam Backup & Replication server will ignore proxy settings.

Purpose

This article documents how to configure WinHTTP Proxy settings for Veeam components in environments where the software must use an HTTP proxy to access the internet.
WinHTTP vs WinInet Proxy Settings
This article documents the configuration of WinHTTP, which is used by various Veeam software products for communications. Some connections used by Veeam products utilize WinInet, which must be configured as documented in KB1975.

Solution

Known Limitation: WinHTTP does not support proxy authentication.
System-Wide Configuration
This change is system-wide and will affect all applications that use WinHTTP, including other third-party or Windows services that use WinHTTP (e.g., Windows Update).
Check Current WinHTTP Proxy Settings

This command will display the current WinHTTP settings:

netsh winhttp show proxy
Set WinHTTP Proxy Settings

This command can be used to set a WinHTTP proxy:

netsh winhttp set proxy proxy-server="<proxy>:<port>"

Note: Replace <proxy> and <port> in quotes with the actual proxy server's hostname or IP and the port it uses. For example this command would set the proxy for all protocols to use proxy.domain.tld (192.168.111.111) port 8080: 

netsh winhttp set proxy proxy-server="192.168.111.111:8080"

netsh winhttp set proxy proxy-server="proxy.domain.tld:8080"


A more advanced example using a specific protocol and exclusions:

netsh winhttp set proxy proxy-server="http=proxy.domain.tld:8080" bypass-list="*.labdomain.tld;*.devlab.tld"
Reset WinHTTP Proxy

This command can be used to reset the WinHTTP settings back to default (no proxy).

netsh winhttp reset proxy

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