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< li class = "md-nav__item" >
< a href = "../u_e-mailcow_ui-css/" class = "md-nav__link" >
CSS overrides
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../u_e-mailcow_ui-bl_wl/" class = "md-nav__link" >
Blacklist / Whitelist
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-mailcow_ui-pushover/" class = "md-nav__link" >
Pushover
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-mailcow_ui-spamfilter/" class = "md-nav__link" >
Spamfilter
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-mailcow_ui-spamalias/" class = "md-nav__link" >
Temporary email aliases
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-mailcow_ui-tagging/" class = "md-nav__link" >
Tagging
< / a >
< / li >
< li class = "md-nav__item md-nav__item--active" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "toc" type = "checkbox" id = "__toc" >
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< label class = "md-nav__link md-nav__link--active" for = "__toc" >
Two-Factor Authentication
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< a href = "./" class = "md-nav__link md-nav__link--active" >
Two-Factor Authentication
< / a >
< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
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< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" > < / span >
Table of contents
< / label >
< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "#yubi-otp" class = "md-nav__link" >
Yubi OTP
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#u2f" class = "md-nav__link" >
U2F
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#totp" class = "md-nav__link" >
TOTP
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-fido2/" class = "md-nav__link" >
WebAuthn / FIDO2
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_8_2" type = "checkbox" id = "__nav_8_2" >
< label class = "md-nav__link" for = "__nav_8_2" >
Postfix
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Postfix" data-md-level = "2" >
< label class = "md-nav__title" for = "__nav_8_2" >
< span class = "md-nav__icon md-icon" > < / span >
Postfix
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../u_e-postfix-custom_transport/" class = "md-nav__link" >
Custom transport maps
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-postfix-postscreen_whitelist/" class = "md-nav__link" >
Whitelist IP in Postscreen
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-postfix-extra_cf/" class = "md-nav__link" >
Customize/Expand main.cf
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-postfix-disable_sender_verification/" class = "md-nav__link" >
Disable Sender Addresses Verification
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-postfix-attachment_size/" class = "md-nav__link" >
Max. message size (attachment size)
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-postfix-pflogsumm/" class = "md-nav__link" >
Statistics with pflogsumm
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_8_3" type = "checkbox" id = "__nav_8_3" >
< label class = "md-nav__link" for = "__nav_8_3" >
Unbound
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Unbound" data-md-level = "2" >
< label class = "md-nav__title" for = "__nav_8_3" >
< span class = "md-nav__icon md-icon" > < / span >
Unbound
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../u_e-unbound-fwd/" class = "md-nav__link" >
Using an external DNS service
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_8_4" type = "checkbox" id = "__nav_8_4" >
< label class = "md-nav__link" for = "__nav_8_4" >
Dovecot
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Dovecot" data-md-level = "2" >
< label class = "md-nav__title" for = "__nav_8_4" >
< span class = "md-nav__icon md-icon" > < / span >
Dovecot
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-any_acl/" class = "md-nav__link" >
Enable "any" ACL settings
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-expunge/" class = "md-nav__link" >
Expunge a Users mails
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-extra_conf/" class = "md-nav__link" >
Customize/Expand dovecot.conf
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-fts/" class = "md-nav__link" >
FTS (Solr)
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-idle_interval/" class = "md-nav__link" >
IMAP IDLE interval
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-mail-crypt/" class = "md-nav__link" >
Mail crypt
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-more/" class = "md-nav__link" >
More Examples with DOVEADM
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-vmail-volume/" class = "md-nav__link" >
Move Maildir (vmail)
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-public_folder/" class = "md-nav__link" >
Public folders
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-dovecot-static_master/" class = "md-nav__link" >
Static master user
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_8_5" type = "checkbox" id = "__nav_8_5" >
< label class = "md-nav__link" for = "__nav_8_5" >
Nginx
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Nginx" data-md-level = "2" >
< label class = "md-nav__title" for = "__nav_8_5" >
< span class = "md-nav__icon md-icon" > < / span >
Nginx
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../u_e-nginx/" class = "md-nav__link" >
Custom sites
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-webmail-site/" class = "md-nav__link" >
Create subdomain webmail.example.org
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-redis/" class = "md-nav__link" >
Redis
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-rspamd/" class = "md-nav__link" >
Rspamd
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-sogo/" class = "md-nav__link" >
SOGo
< / a >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_8_9" type = "checkbox" id = "__nav_8_9" >
< label class = "md-nav__link" for = "__nav_8_9" >
Docker
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Docker" data-md-level = "2" >
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< label class = "md-nav__title" for = "__nav_8_9" >
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< span class = "md-nav__icon md-icon" > < / span >
Docker
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../u_e-docker-cust_dockerfiles/" class = "md-nav__link" >
Customize Dockerfiles
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-docker-dc_bash_compl/" class = "md-nav__link" >
Docker Compose Bash Completion
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-why_unbound/" class = "md-nav__link" >
Why unbound?
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-autodiscover_config/" class = "md-nav__link" >
Autodiscover / Autoconfig
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-80_to_443/" class = "md-nav__link" >
Redirect HTTP to HTTPS
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../u_e-reeanble-weak-protocols/" class = "md-nav__link" >
Re-enable TLS 1.0 and TLS 1.1
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_9" type = "checkbox" id = "__nav_9" >
< label class = "md-nav__link" for = "__nav_9" >
Client Configuration
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Client Configuration" data-md-level = "1" >
< label class = "md-nav__title" for = "__nav_9" >
< span class = "md-nav__icon md-icon" > < / span >
Client Configuration
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../client/" class = "md-nav__link" >
Overview
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-android/" class = "md-nav__link" >
Android
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-apple/" class = "md-nav__link" >
Apple macOS / iOS
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-emclient/" class = "md-nav__link" >
eM Client
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-kontact/" class = "md-nav__link" >
KDE Kontact
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-outlook/" class = "md-nav__link" >
Microsoft Outlook
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-thunderbird/" class = "md-nav__link" >
Mozilla Thunderbird
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-windows/" class = "md-nav__link" >
Windows Mail
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-windowsphone/" class = "md-nav__link" >
Windows Phone
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../client/client-manual/" class = "md-nav__link" >
Manual configuration
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_10" type = "checkbox" id = "__nav_10" >
< label class = "md-nav__link" for = "__nav_10" >
Third party apps
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Third party apps" data-md-level = "1" >
< label class = "md-nav__title" for = "__nav_10" >
< span class = "md-nav__icon md-icon" > < / span >
Third party apps
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../third_party-borgmatic/" class = "md-nav__link" >
Borgmatic Backup
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../third_party-exchange_onprem/" class = "md-nav__link" >
Exchange Hybrid Setup
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-gitea/" class = "md-nav__link" >
Gitea
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-gogs/" class = "md-nav__link" >
Gogs
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-mailpiler_integration/" class = "md-nav__link" >
Mailpiler Integration
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-nextcloud/" class = "md-nav__link" >
Nextcloud
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-portainer/" class = "md-nav__link" >
Portainer
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-roundcube/" class = "md-nav__link" >
Roundcube
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../third_party-thunderbird/" class = "md-nav__link" >
SOGo Connector for Thunderbird
< / a >
< / li >
< / ul >
< / nav >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-sidebar md-sidebar--secondary" data-md-component = "sidebar" data-md-type = "toc" >
< div class = "md-sidebar__scrollwrap" >
< div class = "md-sidebar__inner" >
< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
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< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" > < / span >
Table of contents
< / label >
< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "#yubi-otp" class = "md-nav__link" >
Yubi OTP
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#u2f" class = "md-nav__link" >
U2F
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#totp" class = "md-nav__link" >
TOTP
< / a >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-content" data-md-component = "content" >
< article class = "md-content__inner md-typeset" >
< a href = "https://github.com/mailcow/mailcow-dockerized-docs/edit/master/docs/u_e-mailcow_ui-tfa.md" title = "Edit this page" class = "md-content__button md-icon" >
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z" / > < / svg >
< / a >
< h1 > Two-Factor Authentication< / h1 >
< p > So far three methods for < em > Two-Factor Authentication< / em > are implemented: U2F, Yubi OTP, and TOTP< / p >
< ul >
< li > For U2F to work, you need an encrypted connection to the server (HTTPS) as well as a FIDO security key.< / li >
< li > Both U2F and Yubi OTP work well with the fantastic < a href = "https://www.yubico.com" > Yubikey< / a > .< / li >
< li > While Yubi OTP needs an active internet connection and an API ID + key, U2F will work with any FIDO U2F USB key out of the box, but can only be used when mailcow is accessed over HTTPS.< / li >
< li > U2F and Yubi OTP support multiple keys per user.< / li >
< li > As the third TFA method mailcow uses TOTP: time-based one-time passwords. Those passwords can be generated with apps like "Google Authenticator" after initially scanning a QR code or entering the given secret manually.< / li >
< / ul >
< p > As administrator you are able to temporary disable a domain administrators TFA login until they successfully logged in.< / p >
< p > The key used to login will be displayed in green, while other keys remain grey.< / p >
< p > Information on how to remove 2FA can be found < a href = "https://mailcow.github.io/mailcow-dockerized-docs/debug-reset_pw/#remove-two-factor-authentication" > here< / a > .< / p >
< h3 id = "yubi-otp" > Yubi OTP< a class = "headerlink" href = "#yubi-otp" title = "Permanent link" > ¶ < / a > < / h3 >
< p > The Yubi API ID and Key will be checked against the Yubico Cloud API. When setting up TFA you will be asked for your personal API account for this key.
The API ID, API key and the first 12 characters (your YubiKeys ID in modhex) are stored in the MySQL table as secret.< / p >
< h3 id = "u2f" > U2F< a class = "headerlink" href = "#u2f" title = "Permanent link" > ¶ < / a > < / h3 >
2021-06-19 21:39:24 +02:00
< p > To use U2F, the browser must support this standard.< / p >
< p > The following desktop browsers support this authentication type:< / p >
< ul >
< li > Edge (> =79)< / li >
< li > Firefox (> =47, enabled by default since version 67)< / li >
< li > Chrome (> =41)< / li >
< li > Safari (> =13)< / li >
< li > Opera (40, > =42, not 41)< / li >
< / ul >
< p > The following mobile browsers support this authentication type:< / p >
< ul >
< li > Safari on iOS (> =13.3)< / li >
< li > Firefox on Android (> =68)< / li >
< / ul >
< p > Sources: < a href = "https://caniuse.com/u2f" > caniuse.com< / a > , < a href = "https://blog.mozilla.org/security/2019/08/05/web-authentication-in-firefox-for-android/" > blog.mozilla.org< / a > < / p >
2021-04-01 12:20:45 +02:00
< p > U2F works without an internet connection.< / p >
< h3 id = "totp" > TOTP< a class = "headerlink" href = "#totp" title = "Permanent link" > ¶ < / a > < / h3 >
< p > The best known TFA method mostly used with a smartphone.< / p >
< / article >
< / div >
< / div >
< / main >
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