![]() I'm trying to locate the origin of the packets however so far I cannot identify. I was using ER605 v1 and have now changed to ER605 v2, same problem. ![]() RT01 detected TCP no-Flag attack and dropped 7 packets. RT01 detected TCP no-Flag attack and dropped 8 packets. Be sure to check out the RFC section of any of the corresponding TCP flags above to go into even greater detail of what each one is used for and how it works.These messages are popping up every 10 minutes. If you need to analyze your TCP packets quickly, it's easy to run a tcpdump command for a particular flag and then retrieve the results you require. Knowing your TCP flags can be quite useful for troubleshooting purposes. However, if you would like to run a tcpdump only on packets containing a certain flag you can use one of the following commands. This will allow you to analyze all packets being sent and will display packets containing any of the TCP flags. This needs to be done by a root user so if you don't have root access, try running the following: sudo tcpdump You can view which TCP flags are used for every TCP packet directly from within your command line interface. NS (experimental) - The nonce sum flag is still an experimental flag used to help protect against accidental, malicious concealment of packets from the sender.CWR - The congestion window reduced flag is used by the sending host to indicate it received a packet with the ECE flag set.ECE - This flag is responsible for indicating if the TCP peer is ECN capable.RST - The reset flag gets sent from the receiver to the sender when a packet is sent to a particular host that was not expecting it.However, this is not desirable for certain applications, such as interactive applications (chatting). ![]() Usually, by default, the transport layer waits some time for the application layer to send enough data according to the maximum segment size so that the number of packets transmitted over the network is minimized. PSH - The push flag is similar to the URG flag and tells the receiver to process these packets as they are received instead of buffering them. ![]() The receiver will be notified when all known urgent data has been received.
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