43 lines
1.5 KiB
Markdown
43 lines
1.5 KiB
Markdown
# 【P19现场】现场发现URL封堵有穿透现象
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| ID | Creation Date | Assignee | Status |
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|----|----------------|----------|--------|
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| OMPUB-972 | 2023-07-24T23:04:47.000+0800 | 杨威 | 已解决 |
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---
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在现场发现url封堵有穿透现象,通过wireshark抓包发现:
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1.chrome 发起http请求时,同时创建2个会话。
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2.封堵对第一个会话有效,对第二个会话失效。
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3.第二个会话在三次握手后会很长一段时间没有数据传输(45s以上),此时第一个会话被阻断,第二个会话直接从url请求开始,此时出现穿透
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图片中tcp.stream eq 22 为第二个会话, tcp.stream eq 21为第一个会话
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https://stackoverflow.com/questions/47336535/why-does-chrome-open-a-connection-but-not-send-anything
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**yangwei** commented on *2023-07-31T00:55:02.575+0800*:
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问题原因为功能端新增opening timeout参数,默认10s,测试时的会话从syn到第一个data包间隔45s,在opening状态触发超时,导致无法正确阻断
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自[TSG-16300] OS支持配置TCP的opening timeout和closing timeout参数 - Geedge Networks Jira后提供opening参数,且功能端同步将opening timeout参数提升至60s
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---
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# Attachments
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Attachment: chuantou_1.pcap
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[chuantou_1.pcap](https://gfwleak.exec.li/admin/geedge-jira/raw/branch/master/attachment/41767/chuantou_1.pcap)
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Attachment: screenshot-1.png
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