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How to ignore my ISPs DHCP MTU of only 576?

Hello Sophos Experts!

My issue is as follows... My ISPs DHCP server is setting my external interface's MTU to 576. While an MTU of 1500 should (and does) work, whenever I change the MTU in the WebAdmin UI, it gets reset to 576 by DHCP. Yes, getting the ISP to fix their equipment *IS* the larger, overall solution here, but I cannot rely upon them for such a fix...

How can I alter this behaviour? How can I get my Sophos Gateway to ignore the DHCP packets MTU? How can I permanently, manually override that external interface's MTU?

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0 sachingurung over 7 years ago

Refer: https://community.sophos.com/products/unified-threat-management/f/52/t/79288

Thanks

Sachin Gurung
Team Lead | Sophos Technical Support
Knowledge Base | @SophosSupport | Video tutorials
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0 sachingurung over 7 years ago

Refer: https://community.sophos.com/products/unified-threat-management/f/52/t/79288

Thanks

Sachin Gurung
Team Lead | Sophos Technical Support
Knowledge Base | @SophosSupport | Video tutorials
Remember to like a post. If a post (on a question thread) solves your question use the 'This helped me' link.
Cancel
Vote Up 0 Vote Down

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