joserp93

Sharing WAN with other networks using Nerves - speed reduced by 1/50

Using VintageNet Cookbook — vintage_net v0.13.12

You can share internet from wlan0 to eth0. Following the Vintage cookbook, I understand that this is done via software using NAT and iptables rules.

However, I’m having a problem with download speed; it’s reduced by about 1/50. I tested this with a Raspberry Pi 4. Now, with Raspbian, it works perfectly, maintaining almost the same speed as the Wi-Fi connection shared over Ethernet.

I’d like to know if anyone has experienced this using Nerves and VintageNet, and if so, what possible solutions they have.

6 comments

/nerves #vintage_net #vintage_net_wifi #nat

3 265 6

2025-12-30 08:07:56 UTC

Marked As Solved

joserp93

I found the problem, I needed to add the MSS Clamping rules.

-A FORWARD -i wlan0 -o eth0 -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
-A FORWARD -i eth0 -o wlan0 -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

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Sharing WAN with other networks using Nerves - speed reduced by 1/50

joserp93

Sharing WAN with other networks using Nerves - speed reduced by 1/50

Marked As Solved

joserp93

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Sharing WAN with other networks using Nerves - speed reduced by 1/50

joserp93

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Marked As Solved

joserp93

Where Next?

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