{"id":793,"date":"2026-04-06T07:31:33","date_gmt":"2026-04-06T05:31:33","guid":{"rendered":"https:\/\/blog.exterra-services.cz\/?p=793"},"modified":"2026-04-06T07:33:48","modified_gmt":"2026-04-06T05:33:48","slug":"integrace-proxmox-ve-do-siem","status":"publish","type":"post","link":"https:\/\/blog.exterra-services.cz\/index.php\/2026\/04\/06\/integrace-proxmox-ve-do-siem\/","title":{"rendered":"Integrace Proxmox VE do SIEM"},"content":{"rendered":"\n<p>Proxmox samoz\u0159ejm\u011b loguje velmi podrobn\u011b, ale prost\u00e9 prohl\u00ed\u017een\u00ed log\u016f v GUI v\u011bt\u0161inou nesta\u010d\u00ed a chete logy pos\u00edlat na n\u011bjak\u00fd firemn\u00ed SIEM.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"706\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1024x706.png\" alt=\"\" class=\"wp-image-826\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1024x706.png 1024w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-300x207.png 300w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-768x530.png 768w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image.png 1164w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Pro po\u017eadovanou funk\u010dnost je t\u0159eba ud\u011blat p\u00e1r krok\u016f. Nejprve je t\u0159eba instalovat slu\u017ebu rsyslog.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@hydra:~# apt install rsyslog<br>The following package was automatically installed and is no longer required:<br>  proxmox-kernel-6.8.12-4-pve-signed<br>Use 'apt autoremove' to remove it.<br><br>Installing:<br>  rsyslog<br><br>Installing dependencies:<br>  libestr0  libfastjson4  liblognorm5<br><br>Suggested packages:<br>  rsyslog-doc    | rsyslog-pgsql  rsyslog-elasticsearch  rsyslog-hiredis  rsyslog-kubernetes  rsyslog-clickhouse  | rsyslog-gnutls  rsyslog-relp<br>  rsyslog-mysql  rsyslog-mongodb  rsyslog-kafka          rsyslog-snmp     rsyslog-docker      rsyslog-openssl     rsyslog-gssapi<br><br>Summary:<br>  Upgrading: 0, Installing: 4, Removing: 0, Not Upgrading: 0<br>  Download size: 863 kB<br>  Space needed: 2,338 kB \/ 32.3 GB available<br><br>Continue? [Y\/n] y<br>Get:1 http:\/\/ftp.cz.debian.org\/debian trixie\/main amd64 libestr0 amd64 0.1.11-2 [9,048 B]<br>Get:2 http:\/\/ftp.cz.debian.org\/debian trixie\/main amd64 libfastjson4 amd64 1.2304.0-2 [28.9 kB]<br>Get:3 http:\/\/ftp.cz.debian.org\/debian trixie\/main amd64 liblognorm5 amd64 2.0.6-5 [66.5 kB]<br>Get:4 http:\/\/ftp.cz.debian.org\/debian trixie\/main amd64 rsyslog amd64 8.2504.0-1 [758 kB]<br>Fetched 863 kB in 6s (155 kB\/s)<br>Selecting previously unselected package libestr0:amd64.<br>(Reading database ... 88078 files and directories currently installed.)<br>Preparing to unpack ...\/libestr0_0.1.11-2_amd64.deb ...<br>Unpacking libestr0:amd64 (0.1.11-2) ...<br>Selecting previously unselected package libfastjson4:amd64.<br>Preparing to unpack ...\/libfastjson4_1.2304.0-2_amd64.deb ...<br>Unpacking libfastjson4:amd64 (1.2304.0-2) ...<br>Selecting previously unselected package liblognorm5:amd64.<br>Preparing to unpack ...\/liblognorm5_2.0.6-5_amd64.deb ...<br>Unpacking liblognorm5:amd64 (2.0.6-5) ...<br>Selecting previously unselected package rsyslog.<br>Preparing to unpack ...\/rsyslog_8.2504.0-1_amd64.deb ...<br>Unpacking rsyslog (8.2504.0-1) ...<br>Setting up libestr0:amd64 (0.1.11-2) ...<br>Setting up libfastjson4:amd64 (1.2304.0-2) ...<br>Setting up liblognorm5:amd64 (2.0.6-5) ...<br>Setting up rsyslog (8.2504.0-1) ...<br>Created symlink '\/etc\/systemd\/system\/syslog.service' \u2192 '\/usr\/lib\/systemd\/system\/rsyslog.service'.<br>Created symlink '\/etc\/systemd\/system\/multi-user.target.wants\/rsyslog.service' \u2192 '\/usr\/lib\/systemd\/system\/rsyslog.service'.<br>Processing triggers for libc-bin (2.41-12) ...<br>Processing triggers for man-db (2.13.1-1) ...<br><\/pre>\n\n\n\n<p>Kdy\u017e m\u00e1me instalov\u00e1n rsyslog, mus\u00edme zajistit odes\u00edl\u00e1n\u00ed log\u016f, co\u017e jednodu\u0161e zajist\u00edme p\u0159id\u00e1n\u00edm n\u00e1sleduj\u00edc\u00edho \u0159\u00e1dku do souboru \/etc\/rsyslog.conf<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">*<em>.<\/em>* @192.168.56.9:514<\/pre>\n\n\n\n<p>Pot\u00e9 restartartuje daemona rsyslog a ov\u011b\u0159te, \u017ee b\u011b\u017e\u00ed:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">root@perseus:\/etc# systemctl restart rsyslog<br>root@perseus:\/etc# systemctl status rsyslog<br>\u25cf rsyslog.service - System Logging Service<br>Loaded: loaded (\/usr\/lib\/systemd\/system\/rsyslog.service; enabled; preset: enabled)<br>Active: active (running) since Sun 2026-03-29 15:35:59 CEST; 4s ago<br>Invocation: 6c78f7077a9b413891f3d52f140cf365<br>TriggeredBy: \u25cf syslog.socket<br>Docs: man:rsyslogd(8)<br>man:rsyslog.conf(5)<br>https:\/\/www.rsyslog.com\/doc\/<br>Main PID: 557364 (rsyslogd)<br>Tasks: 4 (limit: 309068)<br>Memory: 1.7M (peak: 2.3M)<br>CPU: 177ms<br>CGroup: \/system.slice\/rsyslog.service<br>\u2514\u2500557364 \/usr\/sbin\/rsyslogd -n -iNONE<\/pre>\n\n\n\n<pre class=\"wp-block-preformatted\">Mar 29 15:35:59 perseus systemd[1]: Starting rsyslog.service - System Logging Service\u2026<br>Mar 29 15:35:59 perseus rsyslogd[557364]: imuxsock: Acquired UNIX socket '\/run\/systemd\/journal\/syslog' (fd 3) from systemd. [v8.2504.0]<br>Mar 29 15:35:59 perseus rsyslogd[557364]: [origin software=\"rsyslogd\" swVersion=\"8.2504.0\" x-pid=\"557364\" x-info=\"https:\/\/www.rsyslog.com\"] start<br>Mar 29 15:35:59 perseus systemd[1]: Started rsyslog.service - System Logging Service.<\/pre>\n\n\n\n<p>Jako c\u00edl jsem zde zvolil Synology NAS se slu\u017ebou syslog serveru, tak\u017ee se nyn\u00ed m\u016f\u017eeme pod\u00edvat, zdali logy opravdu Proxmox zas\u00edl\u00e1.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"487\" src=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1-1024x487.png\" alt=\"\" class=\"wp-image-830\" srcset=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1-1024x487.png 1024w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1-300x143.png 300w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1-768x365.png 768w, https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/03\/image-1.png 1507w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Nyn\u00ed m\u00e1me zaji\u0161t\u011bno, \u017ee v\u00fdstup, kter\u00fd vid\u00edme v GUI Proxmox host zas\u00edl\u00e1m na syslog server (t\u0159eba n\u011bjak\u00fd v\u00e1\u0161 SIEM) a m\u016f\u017eeme s logy d\u00e1l pracovat. <\/p>\n\n\n\n<p>Pokud pou\u017e\u00edv\u00e1te firewall Network Filter (nftables), je u\u017eite\u010dn\u00e9 sb\u00edrat logy zaj\u00edmav\u00fdch ud\u00e1lost\u00ed (typicky pokusy o p\u0159\u00edstup z neautorizovan\u00fd\u00e1ch IP adrsa na slu\u017eby spr\u00e1vy nebo SSH) a vyhodnocovat je (pro detekci pokus\u016f o pr\u016fnik).<\/p>\n\n\n\n<p>V labu, kde jsou t\u0159i PVE hosti (192.168.77.16, 17 a 7) nastav\u00edme pravidla pro NetFilter v \/etc\/nftables.conf<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>flush ruleset\n\na common table for both IPv4 and IPv6\n\ntable inet filter {    \n# protocols to allow\n    set allowed_protocols {\n            type inet_proto\n            elements = { icmp, icmpv6 }\n    }\n\n    # interfaces to accept any traffic on\n    set allowed_interfaces {\n            type ifname\n            elements = { \"lo\" }\n    }\n\n  # PVE hosts\n    set pve_hosts {\n            type ipv4_addr\n            elements = { 192.168.77.16, 192.168.77.17, 192.168.77.7}\n    }\n\n    # restricted services to allow\n    set allowed_tcp_dports {\n            type inet_service\n     flags interval\n            elements = { ssh, 8006, 5900-5999, 3128 }\n    }\n\n\n    # restricted services to allow\n    set allowed_restricted_tcp_dports {\n            type inet_service\n     flags interval\n            elements = { ssh, 8006, 5900-5999, 3128 }\n    }\n\n    # pve internal communications\n    set allowed_pve_tcp_dports {\n            type inet_service\n     flags interval\n          elements = { ssh, 8006, 3128, 5900-5999 }\n    }\n\n    set allowed_pve_udp_dports {\n            type inet_service\n     flags interval\n          elements = { 5404-54059 }\n    }\n\n    # this chain gathers all accept conditions\n    chain allow {\n            ct state established,related accept\n\n            meta l4proto @allowed_protocols accept\n            iifname @allowed_interfaces accept\n            tcp dport @allowed_pve_tcp_dports ip saddr @pve_hosts accept\n            udp dport @allowed_pve_udp_dports ip saddr @pve_hosts accept\n            tcp dport @allowed_tcp_dports accept\n           <strong> tcp dport ssh log prefix \"&#91;nftables] - Inboud SSH Connection Denied: \" counter drop\n            tcp dport 8006 log prefix \"&#91;nftables] - Inboud Management Connection Denied: \" counter drop\n            log prefix \"&#91;nftables] - Inboud Connection Denied: \" counter drop<\/strong>\n    }\n\n    # base-chain for traffic to this host\n    chain INPUT {\n            type filter hook input priority filter + 20\n            policy accept\n\n            jump allow\n            reject with icmpx type port-unreachable\n    }\n}<\/code><\/pre>\n\n\n\n<p>D\u016fle\u017eit\u00e1 jsou pravidla s logov\u00e1n\u00edm:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">tcp dport ssh log prefix \"[nftables] - Inboud SSH Connection Denied: \" counter drop<br>tcp dport 8006 log prefix \"[nftables] - Inboud Management Connection Denied: \" counter drop<br>log prefix \"[nftables] - Inboud Connection Denied: \" counter drop<\/pre>\n\n\n\n<p>Vytvo\u0159te soubor \/etc\/rsyslog.d\/10-nftables.conf<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">:msg, contains, \"[nftables]\" -\/var\/log\/nftables.log<br>&amp; stop<\/pre>\n\n\n\n<p>T\u00edm zajist\u00edme, \u017ee NetFiletr bude logovan\u00fd provoz ukl\u00e1dat do souboru \/var\/log\/nftables.log. Z\u00e1rove\u0148 se ale logovan\u00fd provoz objev\u00ed v syst\u00e9mov\u00e9m logu, tak\u017ee zas\u00edl\u00e1n\u00ed tohoto logu pomoc\u00ed rsyslog daemona na SIEM bude pos\u00edlat i logy firewallu.<\/p>\n\n\n\n<p>Nyn\u00ed u\u017e na stran\u011b SIEM syst\u00e9mu m\u016f\u017eete zpracov\u00e1vat a vyhodnocovat v\u00fdskyty zpr\u00e1v z firewallu a p\u0159\u00edpadn\u011b na n\u011b reagovat n\u011bjakou akc\u00ed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Proxmox samoz\u0159ejm\u011b loguje velmi podrobn\u011b, ale prost\u00e9 prohl\u00ed\u017een\u00ed log\u016f v GUI v\u011bt\u0161inou nesta\u010d\u00ed a chete logy pos\u00edlat na n\u011bjak\u00fd firemn\u00ed SIEM. Pro po\u017eadovanou funk\u010dnost je t\u0159eba ud\u011blat p\u00e1r krok\u016f. Nejprve je t\u0159eba instalovat slu\u017ebu rsyslog. root@hydra:~# apt install rsyslogThe following package was automatically installed and is no longer required: proxmox-kernel-6.8.12-4-pve-signedUse &#8218;apt autoremove&#8216; to remove it.Installing: [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":834,"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":[1],"tags":[],"class_list":["post-793","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nezarazene","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>Integrace Proxmox VE do SIEM | 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\/2026\/04\/06\/integrace-proxmox-ve-do-siem\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Integrace Proxmox VE do SIEM | Coffeespot\" \/>\n<meta property=\"og:description\" content=\"Proxmox samoz\u0159ejm\u011b loguje velmi podrobn\u011b, ale prost\u00e9 prohl\u00ed\u017een\u00ed log\u016f v GUI v\u011bt\u0161inou nesta\u010d\u00ed a chete logy pos\u00edlat na n\u011bjak\u00fd firemn\u00ed SIEM. Pro po\u017eadovanou funk\u010dnost je t\u0159eba ud\u011blat p\u00e1r krok\u016f. Nejprve je t\u0159eba instalovat slu\u017ebu rsyslog. root@hydra:~# apt install rsyslogThe following package was automatically installed and is no longer required: proxmox-kernel-6.8.12-4-pve-signedUse &#039;apt autoremove&#039; to remove it.Installing: [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blog.exterra-services.cz\/index.php\/2026\/04\/06\/integrace-proxmox-ve-do-siem\/\" \/>\n<meta property=\"og:site_name\" content=\"Coffeespot\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-06T05:31:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-06T05:33:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blog.exterra-services.cz\/wp-content\/uploads\/2026\/04\/rsyslogpve.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1536\" \/>\n\t<meta property=\"og:image:height\" content=\"1024\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Petr 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