# \#basics

**URL:** https://help.nextcloud.com/tag/basics/530.md

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## [101: reverse proxy](https://help.nextcloud.com/t/101-reverse-proxy/194840)

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**Author:** [@wwe](https://help.nextcloud.com/u/wwe)\
**Replies:** 0\
**Last updated:** [June 10, 2024, 8:21pm UTC](https://help.nextcloud.com/t/101-reverse-proxy/194840 "2024-06-10T20:21:38Z")

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What is a reverse proxy and how to use it Security: HTTPS encryption (TLS offloading/TLS termination) some reverse proxies like traefik and Caddy could automatically enroll TLS cerificates (others like Apache and Ngin…

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## [Authenticator \\"LOGIN\\" returned \\"Expected response code \\"235\\" but got code \\"535\\", with message \\"535 5.7.8 Error: authentication failed: (reason unavailable)\\"](https://help.nextcloud.com/t/authenticator-login-returned-expected-response-code-235-but-got-code-535-with-message-535-5-7-8-error-authentication-failed-reason-unavailable/213675)

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**Author:** [@kaneki.638](https://help.nextcloud.com/u/kaneki.638)\
**Replies:** 1\
**Last updated:** [December 30, 2024, 5:58pm UTC](https://help.nextcloud.com/t/authenticator-login-returned-expected-response-code-235-but-got-code-535-with-message-535-5-7-8-error-authentication-failed-reason-unavailable/213675 "2024-12-30T17:58:45Z")

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Hi everyone, I hope you are well and I look forward to receiving your help. I am having a problem testing the email settings under Basic Settings in my Nextcloud admin panel. I have encountered several similar issues …