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Firewall Piercing mini-HOWTO
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Firewall Piercing mini-HOWTO
François-René Rideau,
fare@tunes.org
v0.7, 4 November 2025
Directions for using ppp over ssh or telnet so as to do network stuff transparently through an Internet firewall. Also applies to VPN construction.
1.
Stuff
1.1 DISCLAIMER
1.2 Legal Blurp
1.3 Looking for a maintainer
1.4 Credits
2.
Introduction
2.1 Foreword
2.2 Security issues
2.3 Other requirements
2.4 Downloading software
3.
Understanding the problem
3.1 Giving names to things
3.2 The main problem
3.3 The secondary problem
4.
Secure solution: piercing using ssh
4.1 Principle
4.2 A sample session
5.
Unsecure solution: piercing using telnet
5.1 Principle
5.2 fwprc
5.3 .fwprcrc
6.
Reverse piercing
6.1 Rationale
6.2 Getting the triggering mail
7.
Final notes
7.1 Other settings
7.2 HOWTO maintenance
7.3 Related Documents
7.4 Extra copy of IMPORTANT DISCLAIMER --- BELIEVE IT!!!
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