{"id":776,"date":"2025-08-19T12:03:13","date_gmt":"2025-08-19T10:03:13","guid":{"rendered":"https:\/\/blog.exterra-services.cz\/?p=776"},"modified":"2025-08-19T18:53:12","modified_gmt":"2025-08-19T16:53:12","slug":"duo-security-2fa-na-proxmox-ve","status":"publish","type":"post","link":"https:\/\/blog.exterra-services.cz\/index.php\/2025\/08\/19\/duo-security-2fa-na-proxmox-ve\/","title":{"rendered":"Duo Security 2FA na Proxmox VE"},"content":{"rendered":"\n<p>Vytvo\u0159te soubor \/etc\/apt\/sources.list.d\/duosecurity.list s t\u00edmto obsahem:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">deb https:\/\/pkg.duosecurity.com\/Debian bookworm main<\/pre>\n\n\n\n<p>St\u00e1hn\u011bte GPG kl\u00ed\u010d pro Duo repository a nahrajte do syst\u00e9mu.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">wget https:\/\/duo.com\/DUO-GPG-PUBLIC-KEY.asc<br>mv DUO-GPG-PUBLIC-KEY.asc \/etc\/apt\/trusted.gpg.d<\/pre>\n\n\n\n<p>Nainstalujte Duo Security:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@janus:\/etc\/apt\/trusted.gpg.d# apt-get update &amp;&amp; apt-get install duo-unix<br>Get:1 http:\/\/security.debian.org trixie-security InRelease [43.4 kB]<br>Hit:2 http:\/\/ftp.cz.debian.org\/debian trixie InRelease<br>Get:3 http:\/\/ftp.cz.debian.org\/debian trixie-updates InRelease [47.1 kB]<br>Get:4 http:\/\/security.debian.org trixie-security\/main amd64 Packages [11.6 kB]<br>Hit:5 http:\/\/download.proxmox.com\/debian\/pve trixie InRelease<br>Ign:6 https:\/\/pkg.duosecurity.com\/Debian bookworm InRelease<br>Get:7 https:\/\/pkg.duosecurity.com\/Debian bookworm Release [2,047 B]<br>Get:8 http:\/\/security.debian.org trixie-security\/main Translation-en [10.6 kB]<br>Get:9 https:\/\/pkg.duosecurity.com\/Debian bookworm Release.gpg [862 B]<br>Get:10 https:\/\/pkg.duosecurity.com\/Debian bookworm\/main amd64 Packages [743 B]<br>Fetched 116 kB in 3s (41.1 kB\/s)<br>Reading package lists... Done<br>Reading package lists... Done<br>Building dependency tree... Done<br>Reading state information... Done<br>The following package was automatically installed and is no longer required:<br>  proxmox-kernel-6.8.12-11-pve-signed<br>Use 'apt autoremove' to remove it.<br>The following NEW packages will be installed:<br>  duo-unix<br>0 upgraded, 1 newly installed, 0 to remove and 19 not upgraded.<br>Need to get 184 kB of archives.<br>After this operation, 562 kB of additional disk space will be used.<br>Get:1 https:\/\/pkg.duosecurity.com\/Debian bookworm\/main amd64 duo-unix amd64 2.1.0-0 [184 kB]<br>Fetched 184 kB in 1s (191 kB\/s)<br>Selecting previously unselected package duo-unix.<br>(Reading database ... 81355 files and directories currently installed.)<br>Preparing to unpack ...\/duo-unix_2.1.0-0_amd64.deb ...<br>Unpacking duo-unix (2.1.0-0) ...<br>Setting up duo-unix (2.1.0-0) ...<br>Processing triggers for man-db (2.13.1-1) ...<br><\/pre>\n\n\n\n<p>V administraci Dua vytvo\u0159te dal\u0161\u00ed aplikaci.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"357\" height=\"262\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-1.png\" alt=\"\" class=\"wp-image-778\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-1.png 357w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-1-300x220.png 300w\" sizes=\"(max-width: 357px) 100vw, 357px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"680\" height=\"748\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-2.png\" alt=\"\" class=\"wp-image-779\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-2.png 680w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-2-273x300.png 273w\" sizes=\"(max-width: 680px) 100vw, 680px\" \/><\/figure>\n\n\n\n<p>Upravte soubor \/etc\/duo\/pam_duo.conf<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><br>[duo]<br>; Duo integration key<br>ikey = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx<br>; Duo secret key<br>skey = yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy<br>; Duo API host<br>host = zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz<br>; `failmode = safe` In the event of errors with this configuration file or connection to the Duo service<br>; this mode will allow login without 2FA.<br>; `failmode = secure` This mode will deny access in the above cases. Misconfigurations with this setting<br>; enabled may result in you being locked out of your system.<br>failmode = safe<br>; Send command for Duo Push authentication<br>;pushinfo = yes<br><\/pre>\n\n\n\n<p>Otestujte, \u017ee Duo ov\u011b\u0159uje:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@janus:\/# \/usr\/sbin\/login_duo<br>Autopushing login request to phone...<br>Login request denied.<br>Duo two-factor login for petr.santrucek@exterra-services.cz<br><br>Enter a passcode or select one of the following options:<br><br> 1. Duo Push to +XXX XXX XXX 787<br> 2. SMS passcodes to +XXX XXX XXX 787<br><br>Passcode or option (1-2): 1<br><br>Pushed a login request to your device...<br>Success. Logging you in...<br><\/pre>\n\n\n\n<p>Nyn\u00ed je t\u0159eba aktivovat 2FA u u\u017eivatel\u016f PVE.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"436\" height=\"447\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-4.png\" alt=\"\" class=\"wp-image-782\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-4.png 436w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-4-293x300.png 293w\" sizes=\"(max-width: 436px) 100vw, 436px\" \/><\/figure>\n\n\n\n<p>Vyberte u\u017eivatele a z autentik\u00e1toru na mobilu zadejte k\u00f3d.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"511\" height=\"554\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-5.png\" alt=\"\" class=\"wp-image-783\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-5.png 511w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-5-277x300.png 277w\" sizes=\"(max-width: 511px) 100vw, 511px\" \/><\/figure>\n\n\n\n<p>Pokud v\u0161e prob\u011bhne v po\u0159\u00e1dku, objev\u00ed se u\u017eivatel s 2FA autentikac\u00ed.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"849\" height=\"146\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-6.png\" alt=\"\" class=\"wp-image-784\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-6.png 849w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-6-300x52.png 300w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-6-768x132.png 768w\" sizes=\"(max-width: 849px) 100vw, 849px\" \/><\/figure>\n\n\n\n<p>A te\u010f test p\u0159ihl\u00e1\u0161en\u00edm:-)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"197\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-7.png\" alt=\"\" class=\"wp-image-785\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-7.png 400w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-7-300x148.png 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"508\" height=\"163\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-8.png\" alt=\"\" class=\"wp-image-786\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-8.png 508w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-8-300x96.png 300w\" sizes=\"(max-width: 508px) 100vw, 508px\" \/><\/figure>\n\n\n\n<p>Pokud v\u0161e prob\u011bhlo OK, jste uvnit\u0159:-)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"305\" height=\"299\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-9.png\" alt=\"\" class=\"wp-image-787\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-9.png 305w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/image-9-300x294.png 300w\" sizes=\"(max-width: 305px) 100vw, 305px\" \/><\/figure>\n\n\n\n<p>Nyn\u00ed by asi bylo dobr\u00e9 defaultn\u00edmu u\u017eivateli root na PVE zm\u011bnit heslo na opravdu siln\u00e9 a komplexn\u00ed a pou\u017e\u00edvat pouze u\u017eivatele s 2FA.<\/p>\n\n\n\n<p class=\"has-vivid-red-color has-text-color has-link-color has-medium-font-size wp-elements-6492f2a9fef8d9308af7b26d72573187\">Nezapome\u0148te, \u017ee instalaci Duo Security mus\u00edte prov\u00e9st na v\u0161ech nodech clusteru!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Vytvo\u0159te soubor \/etc\/apt\/sources.list.d\/duosecurity.list s t\u00edmto obsahem: deb https:\/\/pkg.duosecurity.com\/Debian bookworm main St\u00e1hn\u011bte GPG kl\u00ed\u010d pro Duo repository a nahrajte do syst\u00e9mu. wget https:\/\/duo.com\/DUO-GPG-PUBLIC-KEY.ascmv DUO-GPG-PUBLIC-KEY.asc \/etc\/apt\/trusted.gpg.d Nainstalujte Duo Security: root@janus:\/etc\/apt\/trusted.gpg.d# apt-get update &amp;&amp; apt-get install duo-unixGet:1 http:\/\/security.debian.org trixie-security InRelease [43.4 kB]Hit:2 http:\/\/ftp.cz.debian.org\/debian trixie InReleaseGet:3 http:\/\/ftp.cz.debian.org\/debian trixie-updates InRelease [47.1 kB]Get:4 http:\/\/security.debian.org trixie-security\/main amd64 Packages [11.6 kB]Hit:5 http:\/\/download.proxmox.com\/debian\/pve trixie [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":789,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ocean_post_layout":"","ocean_both_sidebars_style":"","ocean_both_sidebars_content_width":0,"ocean_both_sidebars_sidebars_width":0,"ocean_sidebar":"","ocean_second_sidebar":"","ocean_disable_margins":"enable","ocean_add_body_class":"","ocean_shortcode_before_top_bar":"","ocean_shortcode_after_top_bar":"","ocean_shortcode_before_header":"","ocean_shortcode_after_header":"","ocean_has_shortcode":"","ocean_shortcode_after_title":"","ocean_shortcode_before_footer_widgets":"","ocean_shortcode_after_footer_widgets":"","ocean_shortcode_before_footer_bottom":"","ocean_shortcode_after_footer_bottom":"","ocean_display_top_bar":"default","ocean_display_header":"default","ocean_header_style":"","ocean_center_header_left_menu":"","ocean_custom_header_template":"","ocean_custom_logo":0,"ocean_custom_retina_logo":0,"ocean_custom_logo_max_width":0,"ocean_custom_logo_tablet_max_width":0,"ocean_custom_logo_mobile_max_width":0,"ocean_custom_logo_max_height":0,"ocean_custom_logo_tablet_max_height":0,"ocean_custom_logo_mobile_max_height":0,"ocean_header_custom_menu":"","ocean_menu_typo_font_family":"","ocean_menu_typo_font_subset":"","ocean_menu_typo_font_size":0,"ocean_menu_typo_font_size_tablet":0,"ocean_menu_typo_font_size_mobile":0,"ocean_menu_typo_font_size_unit":"px","ocean_menu_typo_font_weight":"","ocean_menu_typo_font_weight_tablet":"","ocean_menu_typo_font_weight_mobile":"","ocean_menu_typo_transform":"","ocean_menu_typo_transform_tablet":"","ocean_menu_typo_transform_mobile":"","ocean_menu_typo_line_height":0,"ocean_menu_typo_line_height_tablet":0,"ocean_menu_typo_line_height_mobile":0,"ocean_menu_typo_line_height_unit":"","ocean_menu_typo_spacing":0,"ocean_menu_typo_spacing_tablet":0,"ocean_menu_typo_spacing_mobile":0,"ocean_menu_typo_spacing_unit":"","ocean_menu_link_color":"","ocean_menu_link_color_hover":"","ocean_menu_link_color_active":"","ocean_menu_link_background":"","ocean_menu_link_hover_background":"","ocean_menu_link_active_background":"","ocean_menu_social_links_bg":"","ocean_menu_social_hover_links_bg":"","ocean_menu_social_links_color":"","ocean_menu_social_hover_links_color":"","ocean_disable_title":"default","ocean_disable_heading":"default","ocean_post_title":"","ocean_post_subheading":"","ocean_post_title_style":"","ocean_post_title_background_color":"","ocean_post_title_background":0,"ocean_post_title_bg_image_position":"","ocean_post_title_bg_image_attachment":"","ocean_post_title_bg_image_repeat":"","ocean_post_title_bg_image_size":"","ocean_post_title_height":0,"ocean_post_title_bg_overlay":0.5,"ocean_post_title_bg_overlay_color":"","ocean_disable_breadcrumbs":"default","ocean_breadcrumbs_color":"","ocean_breadcrumbs_separator_color":"","ocean_breadcrumbs_links_color":"","ocean_breadcrumbs_links_hover_color":"","ocean_display_footer_widgets":"default","ocean_display_footer_bottom":"default","ocean_custom_footer_template":"","ocean_post_oembed":"","ocean_post_self_hosted_media":"","ocean_post_video_embed":"","ocean_link_format":"","ocean_link_format_target":"self","ocean_quote_format":"","ocean_quote_format_link":"post","ocean_gallery_link_images":"on","ocean_gallery_id":[],"footnotes":""},"categories":[5],"tags":[],"class_list":["post-776","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technologie","entry","has-media"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Duo Security 2FA na Proxmox VE | Coffeespot<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.exterra-services.cz\/index.php\/2025\/08\/19\/duo-security-2fa-na-proxmox-ve\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Duo Security 2FA na Proxmox VE | Coffeespot\" \/>\n<meta property=\"og:description\" content=\"Vytvo\u0159te soubor \/etc\/apt\/sources.list.d\/duosecurity.list s t\u00edmto obsahem: deb https:\/\/pkg.duosecurity.com\/Debian bookworm main St\u00e1hn\u011bte GPG kl\u00ed\u010d pro Duo repository a nahrajte do syst\u00e9mu. wget https:\/\/duo.com\/DUO-GPG-PUBLIC-KEY.ascmv DUO-GPG-PUBLIC-KEY.asc \/etc\/apt\/trusted.gpg.d Nainstalujte Duo Security: root@janus:\/etc\/apt\/trusted.gpg.d# apt-get update &amp;&amp; apt-get install duo-unixGet:1 http:\/\/security.debian.org trixie-security InRelease [43.4 kB]Hit:2 http:\/\/ftp.cz.debian.org\/debian trixie InReleaseGet:3 http:\/\/ftp.cz.debian.org\/debian trixie-updates InRelease [47.1 kB]Get:4 http:\/\/security.debian.org trixie-security\/main amd64 Packages [11.6 kB]Hit:5 http:\/\/download.proxmox.com\/debian\/pve trixie [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.exterra-services.cz\/index.php\/2025\/08\/19\/duo-security-2fa-na-proxmox-ve\/\" \/>\n<meta property=\"og:site_name\" content=\"Coffeespot\" \/>\n<meta property=\"article:published_time\" content=\"2025-08-19T10:03:13+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-19T16:53:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2025\/08\/pve-duo.png\" \/>\n\t<meta property=\"og:image:width\" 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