# Block DHCP from external (wan)

**URL:** <https://forum.gl-inet.com/t/block-dhcp-from-external-wan/43461>\
**Category:** Router\
**Created:** [June 11, 2024, 3:07pm UTC](https://forum.gl-inet.com/t/block-dhcp-from-external-wan/43461 "2024-06-11T15:07:09Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![jjj](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/j/839c29/32.png) [@jjj](https://forum.gl-inet.com/u/jjj)\
**Post date:** [June 11, 2024, 3:07pm UTC](https://forum.gl-inet.com/t/block-dhcp-from-external-wan/43461/1 "2024-06-11T15:07:09Z")

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How to block external DHCP?

It looks like it can be vulnerable:

> **[CVE-2024-3661: TunnelVision - How Attackers Can Decloak Routing-Based VPNs For...](https://www.leviathansecurity.com/blog/tunnelvision)**
>
> We discovered a fundamental design problem in VPNs and we're calling it TunnelVision. This problem lets someone see what you're doing online, even if you think you're safely using a VPN.

Also will Gl.iNet patch it out?

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**Author:** ![packetmonkey](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/packetmonkey/32/16711_2.png) [@packetmonkey](https://forum.gl-inet.com/u/packetmonkey)\
**Post date:** [June 11, 2024, 6:42pm UTC](https://forum.gl-inet.com/t/block-dhcp-from-external-wan/43461/2 "2024-06-11T18:42:08Z")

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If you block DHCP on WAN you will likely no longer be able to use the travel routers for travel. There is a LONG thread on this one if you want to search for it. @admon - should this thread be closed?

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**Author:** ![admon](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/admon/32/32880_2.png) [@admon](https://forum.gl-inet.com/u/admon)\
**Post date:** [June 11, 2024, 6:43pm UTC](https://forum.gl-inet.com/t/block-dhcp-from-external-wan/43461/3 "2024-06-11T18:43:02Z")

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Yup, will close this thread.

This topic was discussed more than enough: [Are Glinet mobile router protected against CVE-2024-3661 (tunnelvision)?](https://forum.gl-inet.com/t/are-glinet-mobile-router-protected-against-cve-2024-3661-tunnelvision/41994/1)

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**Author:** ![admon](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/admon/32/32880_2.png) [@admon](https://forum.gl-inet.com/u/admon)\
**Post date:** [June 11, 2024, 6:43pm UTC](https://forum.gl-inet.com/t/block-dhcp-from-external-wan/43461/4 "2024-06-11T18:43:06Z")

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