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← Back to Microsoft Edge Security Technical Implementation Guide

V-235719

CAT III (Low)

User control of proxy settings must be disabled.

Rule ID

SV-235719r1156558_rule

STIG

Microsoft Edge Security Technical Implementation Guide

Version

V2R5

CCIs

CCI-001414

Discussion

This action configures the proxy settings for Microsoft Edge. If this policy is enabled, Microsoft Edge ignores all proxy-related options specified from the command line. If this policy is not configured, users can choose their own proxy settings. This policy overrides the following individual policies: - ProxyMode. - ProxyPacUrl. - ProxyServer. - ProxyBypassList. Setting the ProxySettings policy accepts the following fields: - ProxyMode, which allows for the proxy server used by Microsoft Edge to be specified and prevents users from changing proxy settings. - ProxyPacUrl, a URL to a proxy .pac file. - ProxyServer, a URL for the proxy server. - ProxyBypassList, a list of proxy hosts that Microsoft Edge bypasses. For ProxyMode, the following values have the noted impact: - direct, a proxy is never used and all other fields are ignored. - system, the system's proxy is used and all other fields are ignored. - auto_detect, all other fields are ignored. - fixed_servers, the ProxyServer and ProxyBypassList fields are used. - pac_script, the ProxyPacUrl and ProxyBypassList fields are used.

Check Content

The policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Proxy server/Proxy Settings" must be "Enabled", and have a "Proxy Settings" value defined for "ProxyMode".

"ProxyMode" must be defined and set to one of the following: "direct", "system", "auto_detect", "fixed_servers", or "pac_script".

Consult Microsoft documentation for proper configuration of the text string required to define the "Proxy Settings" value.

Example:  {"ProxyMode": "fixed_servers", "ProxyServer": "123.123.123.123:8080"}

Values for "ProxyPacUrl", "ProxyServer", or "ProxyBypassList" are optional.

Use the Windows Registry Editor to navigate to the following key:
HKLM\SOFTWARE\Policies\Microsoft\Edge

If the REG_SZ value for "ProxySettings" does not have "ProxyMode" configured, this is a finding.

Fix Text

Set the policy value for "Computer Configuration/Administrative Templates/Microsoft Edge/Proxy server/Proxy Settings" to "Enabled" and define a value for "ProxyMode".

"ProxyMode" must be defined and set to one of the following: "direct", "system", "auto_detect", "fixed_servers", or "pac_script".

Consult Microsoft documentation for proper configuration of the text string required to define the "Proxy Settings" value.

Example:  {"ProxyMode": "fixed_servers", "ProxyServer": "127.0.0.1:8080"}

"ProxyPacUrl", "ProxyServer", or "ProxyBypassList" are optional.