Hi, i use routeros v5.20 on x86, i have an issue with client pc, routeros is blocking “sellercentral.amazon.com” and “outlook.live.com/owa” only on windows 10, i can’t troubleshoot this issue kindly help me out.
Try to upgrade your RouterOs. This RouterOs version is to old, i think since 2012 maybe.
If you use PPPoE, you might need to adjust the MSS, like this
/ip firewall mangle add action=change-mss chain=forward new-mss=clamp-to-pmtu passthrough=yes protocol=tcp tcp-flags=syn
OK, Thank you.