/ip firewall mangle
add action=change-mss chain=forward new-mss=clamp-to-pmtu passthrough=yes protocol=tcp tcp-flags=syn

BIG THANKS pe1chl

Useing Winbox direct from WAN is mi good idea ,
Is your ROS up to date?

yes my routerOS and firmware is uptodate. and wy using winbox from wan?

Hello good luck for us and keep spirit. i have some problem with my routerboard RB2011 from 3 month ago until now. the problem is, i can't load some website and appear error " this site can't be reached.". but i can ping the website normaly. whats wrong with my routerboard and the configur...

Hallo i am newbie first, sorry for my english i have a problem with my Mikrotik routers. some website can't access but i can ping. the error is "this site can't be reached" https://www.google.co.id/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&v...

sorry guys, i want to tell you about this problem. i was created vpn server in routerboard and then if i turn on VPN connection, all websites can open and load normaly. but if i turn off VPN, i dont open and load again maybe this problem solved, but i not satisfied. i want to access the site normaly...

Please send a screenshot, picture, or more detailed information about the error you are receiving: For Example: System Hardware System OS Browser Type MT Router Type Thanks and good luck, we are here to try and help! https://goo.gl/images/uWEyxX OS : Windows 10 browser: chrome MT router: RB2011 LS ...

It looks like you get your internet through PPPoE. In that case MTU varies between 1480 and 1492 normally. Also, try clamping your mss with your pmtu with a simple rule like this: /ip firewall mangle add action=change-mss chain=forward new-mss=clamp-to-pmtu out-interface="WAN" passthrough...

set up dns, as i can see you dns looks like blank

i have change and fill the blank with google DNS 8.8.8.8 , 8.8.4.4 but no effect, you have any solution?

Make max udp packet size 4096

i have change but no effect, you have any solution?

how your DNS looks like?

my dns conf like this " /ip dns set allow-remote-requests=yes cache-max-ttl=1d cache-size=5000KiB max-udp-packet-size=512"
i set DNS from ISP like dynamic DNS

can you give me the example of rule?
sorry hehe

Hallo i am newbie first, sorry for my english i have a problem with my Mikrotik routers. some website can't access but i can ping. the error is "this site can't be reached" https://www.google.co.id/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ve...