Detected TCP SYN-and-FIN packets attacked and dropped packets

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Detected TCP SYN-and-FIN packets attacked and dropped packets

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Detected TCP SYN-and-FIN packets attacked and dropped packets
Detected TCP SYN-and-FIN packets attacked and dropped packets
2024-03-13 06:06:59 - last edited 2024-03-15 01:18:36
Model: ER605 (TL-R605)  
Hardware Version: V1
Firmware Version: 1.3.0 Build 20230511 Rel.51317

Hi good day,

 

I'm afraid regarding on this warning on my system log. "Detected TCP SYN-and-FIN packets attacked and dropped packets"

 

Please enlighten us regarding on this and also how to prevent it.

 

 

 

 

Thank you

 

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Re:Detected TCP SYN-and-FIN packets attacked and dropped packets-Solution
2024-03-13 07:14:46 - last edited 2024-03-15 01:18:36

Hi @ken22 

Thanks for posting in our business forum.

1. Update your firmware.

2. Explained here. If this does not show up the IP address, you might need to Wireshark and find out what device is sending this repeatedly.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update!Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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Re:Detected TCP SYN-and-FIN packets attacked and dropped packets-Solution
2024-03-13 07:14:46 - last edited 2024-03-15 01:18:36

Hi @ken22 

Thanks for posting in our business forum.

1. Update your firmware.

2. Explained here. If this does not show up the IP address, you might need to Wireshark and find out what device is sending this repeatedly.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update!Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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