Portal authentication HTTP redirection using netfilter NFQUEUE

Huan-jie ZHANG; Yu-liang XIA

doi:10.3969/j.issn.1000-436x.2014.z1.020

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Portal authentication HTTP redirection using netfilter NFQUEUE

Compus network engineering | 更新时间：2024-06-05

- Portal authentication HTTP redirection using netfilter NFQUEUE
- Journal on Communications Vol. 35, Issue Z1, Pages: 103-106(2014)
- 作者机构：
  
  中国科学技术大学网络信息中心，安徽合肥 230026
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.1000-436x.2014.z1.020
  CLC： TP393.07
- Online First：2014-10，
  
  Published：25 October 2014
- 稿件说明：
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Huan-jie ZHANG, Yu-liang XIA. Portal authentication HTTP redirection using netfilter NFQUEUE[J]. Journal on Communications, 2014, 35(Z1): 103-106.
DOI：

Huan-jie ZHANG, Yu-liang XIA. Portal authentication HTTP redirection using netfilter NFQUEUE[J]. Journal on Communications, 2014, 35(Z1): 103-106. DOI： 10.3969/j.issn.1000-436x.2014.z1.020.

摘要

摘要：利用netfilter的NFQUEUE机制，将未认证用户的TCP 80端口流量发送至用户态进程redir_http，redir_http使用原始套接字发送应答数据分组，在用户态实现HTTP重定向功能。这种实现方法既保证了重定向的高性能，又能避免Linux内核中的繁琐程序开发，降低程序开发复杂度，提高系统运行的稳定性。

Abstract

When using portal for user authentication

unauthorized user's HTTP access should be redirected to portal login page to help user do authentication.Using netfilter NFQUEUE target send unauthorized user TCP port 80 packets to user-space program redir_http.Redir_http will send IP reply packets to user do HTTP redirection with the help of raw socket.Using NFQUEUE can ensures high performance redirection

avoid troublesome development in the Linux kernel

simplify application development and improve system stability.

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references

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PABLO NEIRA AYUSO . PABLO NEIRA AYUSO.libnetfilter_queue [EB/OL ] . https://git.netfilter.org/libnetfilter_queue/ https://git.netfilter.org/libnetfilter_queue/ .

Calculating IP and TCP checksums [EB/OL ] . http://www.bloof.de/tcp_checksumming http://www.bloof.de/tcp_checksumming .

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