Constant TCP No-Flag and TCP SYN-and-FIN Attack Notifications
I continue to get Constant TCP No-Flag and TCP SYN-and-FIN Attack Notifications. This has been going on for several firmware versions and does not seem to be abating.
Controller and Route/Gateway versions and firmware. All of my hardware is listed in my signature block.
OC200 V1 - OC200(UN)_v1_1.26.3_20230906
TL-R605 v1.0 - ER605(UN)_v1_1.3.0 Build 20230511
These are the instances for today so far at 09:30:
2023-09-22 00:05:10 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP no-Flag attack and dropped 1 packets.
2023-09-22 00:21:21 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP SYN-and-FIN packets attack and dropped 1 packets.
2023-09-22 00:42:43 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP SYN-and-FIN packets attack and dropped 1 packets.
2023-09-22 01:22:54 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP SYN-and-FIN packets attack and dropped 1 packets.
2023-09-22 01:41:34 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP no-Flag attack and dropped 1 packets.
2023-09-22 06:47:32 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP no-Flag attack and dropped 1 packets.
2023-09-22 06:59:45 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP SYN-and-FIN packets attack and dropped 1 packets.
2023-09-22 07:27:39 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP SYN-and-FIN packets attack and dropped 1 packets.
2023-09-22 09:27:33 DEVICE WARNING [osg:1. Router/Gateway:xx-xx-xx-xx-xx-xx] detected TCP SYN-and-FIN packets attack and dropped 1 packets.