We have a network with only Omada switches (SG2210P) and AP (610 & 615) and OC200. All are at the latest level and all are V1.

The WAN connection is UTPcat6 1GB up&down fixed IP address.

After upgrading to 1.4.0 at least every 10min error msg like "Router Detected TCP SYN packets attack and dropped xxx packets"

In this business comunity i identified similar issues with the ER605 and simular I tried first to stop the email and error logs by

OC200: "log => notifications => devices "  Gateway Detected Attack unmarked all 3 options.

This indeed stopped all the alerts and emails.

However the network speed is stalling frequently to the point employees can not work properly.

Network provider states: "there is no such attack or has been any in the last month"

To solve the stalling issue I now did unmark the "Block TCP Scan with RST" (OC200: Network security => Attack defence)

This is not a acceptable situation, only a must assessing risk versus ability for employees to work. 

Is this a known issue and has somebody made a request to fix this error?

regards jw