How can I change MSS for PPOE connection

Hi guys,

I have experience problems with losing pings on my connection. I did small troubleshooting by connecting Cisco router and changing MSS and everything is working correctly.

How can I change MSS for PPPoE connection to 1448 on RouterOS?

Luca

hi
ip firewall mangel chain=forward action=change-mss new-mss=1440 tcp-flags=syn protocol=tcp out-interface=all-ppp tcp-mss=1441-65535
ip firewall mangel chain=forward action=change-mss new-mss=1420 tcp-flags=syn protocol=tcp in-interface=all-ppp tcp-mss=1421-65535

Thanks for your help.