Slow downloads OPNSENSE over PC

[Xames81]

I migred Lan clients from sonicwall to opnsense, but when i try to download something on opnsense downloads are so slowed, on sonicwall its fine, i have all lan rule open and nic cards not usb for networking with 1gb switches, why is slow downloads? I try disabling Clamav and Ips but all the same, no good performance, the pc is so new, not an old one, and all nics realtek.

Thanks.

[mimugmail]

It must be related to the MTU.

Can you lower the MSS on LAN Interface to 1300 for testing?

[Xames81]

Wow it works fine! Thanks.