Did you know every MikroTik Router comes with a default configuration?
All RouterBOARDs from factory come with default configuration. There are several different configurations depending on board type:
- CPE Router;
- LTE CPE AP router;
- AP Router (single or dual band);
- PTP Bridge (AP or CPE);
- WISP Bridge (AP in ap_bridge mode);
- Switch;
- IP Only;
- CAP.
You can run command /system default-configuration print to see exact applied default configuration commands.
IPv4 FastTrack handler
IPv4 FastTrack handler is automatically used for marked connections. Use firewall action “fasttrack-connection” to mark connections for fasttrack. Currently only TCP and UDP connections can be actually fasttracked (even though any connection can be marked for fasttrack). IPv4 FastTrack handler supports NAT (SNAT, DNAT or both).
NOTE: Not all packets in a connection can be fasttracked, so it is likely to see some packets going through slow path even though connection is marked for fasttrack. This is the reason why fasttrack-connection is usually followed by identical action=accept rule. Fasttracked packets bypass firewall, connection tracking, simple queues, queue tree with parent=global, ip traffic-flow(restriction removed in 6.33), IP accounting, IPSec, hotspot universal client, VRF assignment, so it is up to administrator to make sure fasttrack does not interfere with other configuration;
There is a default configuration in IP Firewall Filter;
—
add action=fasttrack-connection chain=forward connection-state=established,related
—
This rule can interrupt some services like IPSec and peoples have no idea why this issue happens and how to fix it.
For more information on FastTrack and default configurations
To learn more about Manual Default Configurations, click here.
To learn more about FastTrack, click here.
To learn more MikroTik Insider Secrets, click here. Or just call us at 647-247-2325.
