geedge-jira/md/OMPUB-1477.md

# UDP会话中客户端和服务端识别错误

| ID | Creation Date | Assignee | Status |
|----|----------------|----------|--------|
| OMPUB-1477 | 2024-09-20T14:15:02.000+0800 | 郑超 | 开放 |


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UDP会话中客户端和服务端识别错误

1、在提取QuarkVPN特征时候发现，VPN使用UDP协议的时候，服务器常用口端口为59001/59002/60000，数值比客户端随机分配的端口大

2、测试系统：工程部测试环境

CM：192.168.44.228

OLAP：192.168.44.229

TSG-OS：192.168.40.84

客户端IP地址：192.168.54.220

3、三个session均为连接VPN节点后，下载了一个2MB左右的文件，然后断开连接，保存的数据包

4、Session_Record、数据包见附件

!image-2024-09-20-14-17-27-026.png|width=1082,height=485!

# Attachments

Attachment: image-2024-09-20-14-17-27-026.png

![image-2024-09-20-14-17-27-026.png](https://gfwleak.exec.li/admin/geedge-jira/raw/branch/master/attachment/63188/image-2024-09-20-14-17-27-026.png)



Attachment: session_record.csv

[session_record.csv](https://gfwleak.exec.li/admin/geedge-jira/raw/branch/master/attachment/63193/session_record.csv)



Attachment: udp01.pcap

[udp01.pcap](https://gfwleak.exec.li/admin/geedge-jira/raw/branch/master/attachment/63192/udp01.pcap)



Attachment: udp02.pcap

[udp02.pcap](https://gfwleak.exec.li/admin/geedge-jira/raw/branch/master/attachment/63191/udp02.pcap)



Attachment: udp03.pcap

[udp03.pcap](https://gfwleak.exec.li/admin/geedge-jira/raw/branch/master/attachment/63190/udp03.pcap)