Home.md
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### networking
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- [firewalls](technology/networking/firewalls)
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+- [openssl](technology/networking/openssl)
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- [subnet_cheatsheet](technology/networking/subnet_cheatsheet)
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- [wifi_connect](technology/networking/wifi_connect)
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technology/networking/openssl.md
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+# openssl
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+
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+## check https connection
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+```
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+openssl s_client -connect domain.com:443
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+```