NSA 4600 - dropped packets for invalid TCP Flag #1

UTCTech

Getting some dropped packets on the sonicwall with the below error

any idea what could be causing this.

DROPPED, Drop Code: 70(Invalid TCP Flag(#1)), Module Id: 25(network), (Ref.Id: _5712_uyHtJcpfngKrRmv) 1:3)

Seen this but not resolved the issues (noticed the flag is #2 not #1)

https://www.sonicwall.com/support/knowledge-base/dropped-packets-because-of-invalid-tcp-flag/210614064540070/

UTCTech

This is on a NSA 4600 with firmware ver 6.5.4.8-89

Nevyaditha

Hi @UTCTech ,

Can you please follow the KB below:

https://www.sonicwall.com/support/knowledge-base/dropped-packets-because-of-invalid-tcp-flag/170504420448221/

This article describes how to workaround the drop "(Invalid TCP Flag(#2)), Module Id: 25(network)" due to network issues.

Regards