i am not able to access few websites after connecting my internet line through mikrotik routerboard.

RouterOS Beginner Basics
1

when i connect internet through mikrotik router i am not able to access few websites .but when i directly connect internet on
my pc i can access those websites that were blocked before! can anyone help me out what could be the solution!

2

do you use PPPoE?

Use /ip firewall mangle to change MSS (maximum segment size) 40 bytes less than your connection MTU. For example, if you have encrypted PPPoE link with MTU=1492, set the mangle rule as follows:

/ ip firewall mangle
add chain=forward protocol=tcp tcp-flags=syn action=change-mss tcp-mss=!0-1448 new-mss=1448

3

yes i am using PPPoE.

4

thanks for reply,
there are 4 mangle rules created in router dynamically. Here i am attaching snapshots.

5

yes i am using PPPoe, and there are 4 mangle created on router dynamically. If i disable these dynamically created mangle, do it disconnect PPPoE or it won’t affect PPPoE?

Here i am attaching screenshots
rathod3.PNG
rathod2.PNG
rathod1.PNG

6

Thanks problem is solved..

i used this command

ip firewall mangle
add chain=forward protocol=tcp tcp-flags=syn action=change-mss tcp-mss=!0-1432 new-mss=1410