{"id":28345,"date":"2025-03-26T20:24:01","date_gmt":"2025-03-26T18:24:01","guid":{"rendered":"https:\/\/cryptrz.org\/wordpress\/?p=28345"},"modified":"2025-05-14T05:40:01","modified_gmt":"2025-05-14T03:40:01","slug":"cacher-le-hostname-sous-linux","status":"publish","type":"post","link":"https:\/\/cryptrz.org\/wordpress\/2025\/03\/26\/cacher-le-hostname-sous-linux\/","title":{"rendered":"Cacher le hostname sous Linux"},"content":{"rendered":"\n<p>Si vous vous connectez r\u00e9guli\u00e8rement sur des <a href=\"https:\/\/fr.wikipedia.org\/wiki\/R%C3%A9seau_informatique\" target=\"_blank\" rel=\"noreferrer noopener\">r\u00e9seaux<\/a> qui ne vous appartiennent pas, que ce soit dans un centre commercial, \u00e0 l&rsquo;a\u00e9roport, \u00e0 l&rsquo;h\u00f4tel, ou autres types de <a href=\"https:\/\/fr.digi.com\/blog\/post\/private-network-vs-public-network\" target=\"_blank\" rel=\"noreferrer noopener\">r\u00e9seaux publiques<\/a>, plusieurs pr\u00e9cautions qui sont <a href=\"https:\/\/www.cnil.fr\/fr\/utiliser-un-wi-fi-public-voici-4-precautions-prendre\" target=\"_blank\" rel=\"noreferrer noopener\">souvent recommand\u00e9es<\/a>. Une des principales est bien souvent d&rsquo;utiliser un <a href=\"https:\/\/fr.wikipedia.org\/wiki\/R%C3%A9seau_priv%C3%A9_virtuel\" target=\"_blank\" rel=\"noreferrer noopener\">VPN<\/a> (non, cet article n&rsquo;est pas sponsoris\u00e9 par BiduleVPN), de bien penser \u00e0 v\u00e9rfier que le site est en <a href=\"https:\/\/support.mozilla.org\/fr\/kb\/mode-https-uniquement-dans-firefox\" target=\"_blank\" rel=\"noreferrer noopener\">HTTPS<\/a> (petit cadenas, etc&#8230;), et autres conseils du m\u00eame genre, Mais il en existe un qui est souvent ignor\u00e9 alors que pourtant il peut donner des infos sur vous ou votre machine, ou les deux, c&rsquo;est le <a href=\"https:\/\/www.malekal.com\/quest-ce-quun-nom-hote-hostname\/\" target=\"_blank\" rel=\"noreferrer noopener\">hostname<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"832\" height=\"448\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-12.png\" alt=\"Vue sur des serveurs qui ont la classe\" class=\"wp-image-28376\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-12.png 832w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-12-300x162.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-12-768x414.png 768w\" sizes=\"auto, (max-width: 832px) 100vw, 832px\" \/><\/figure>\n\n\n\n<p>Votre ordinateur, qu&rsquo;il soit sous <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Linux\" target=\"_blank\" rel=\"noreferrer noopener\">Linux<\/a>, <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Microsoft_Windows\" target=\"_blank\" rel=\"noreferrer noopener\">Windows<\/a> ou <a href=\"https:\/\/fr.wikipedia.org\/wiki\/MacOS\" target=\"_blank\" rel=\"noreferrer noopener\">macOS<\/a>, a un nom qui apparait sur chaque r\u00e9seau sur lequel il se connecte. Quand le nom est \u00ab\u00a0Tim\u00e9o&rsquo;s MacBook Pro\u00a0\u00bb comme c&rsquo;est souvent le cas par d\u00e9faut chez Apple, on a votre pr\u00e9nom et le mod\u00e8le de machine, ce qui inclut aussi le type de syst\u00e8me d&rsquo;exploitation dans le cas d&rsquo;Apple (sauf <a href=\"https:\/\/sm.pcmag.com\/t\/pcmag_uk\/news\/l\/linuxs-lin\/linuxs-linus-torvalds-sorry-for-being-a-jerk_66mp.1920.png\" target=\"_blank\" rel=\"noreferrer noopener\">exceptions<\/a>), C&rsquo;est bien \u00e9videmment <a href=\"https:\/\/www.reddit.com\/r\/sysadmin\/comments\/71hv43\/computer_naming_with_username_security_risk\/?tl=fr\" target=\"_blank\" rel=\"noreferrer noopener\">un risque en terme de s\u00e9curit\u00e9<\/a>, Un <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Macintosh\" target=\"_blank\" rel=\"noreferrer noopener\">Mac<\/a> est rarement sous autre chose que macOS (toujours possible d&rsquo;y installer un <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Liste_des_distributions_GNU\/Linux\" target=\"_blank\" rel=\"noreferrer noopener\">Linux<\/a> ou un <a href=\"https:\/\/en.wikipedia.org\/wiki\/List_of_BSD_operating_systems\" target=\"_blank\" rel=\"noreferrer noopener\">BSD<\/a> mais plus rare).<\/p>\n\n\n\n<p>Si sous <strong>Windows<\/strong> et <strong>macOS<\/strong> il est relativement facile de modifier le hostname, nous allons voir comment proc\u00e9der sous <strong>Linux<\/strong> pour le supprimer compl\u00e8tement. Dans l&rsquo;exemple qui suit nous allons utiliser <a href=\"https:\/\/www.linuxmint.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Linux Mint<\/a> mais le principe sera plus ou moins le m\u00eame sur une autre distrib.<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0);color:#ff0000\" class=\"has-inline-color\"><strong>Petite pr\u00e9cision avant de commencer:<\/strong> il n&rsquo;est pas toujours n\u00e9cessaire de faire la totalit\u00e9 de ce qu&rsquo;on va voir ci-dessous. Selon le r\u00e9seau sur lequel vous \u00eates connect\u00e9, une ou deux manips peuvent parfois suffir. Mais comme chaque r\u00e9seau est diff\u00e9rent, il est pr\u00e9f\u00e9rable de tout faire afin de pouvoir s&rsquo;adapter \u00e0 la plupart des connections auxquelles vous vous connecterez. Ce que je propose n&rsquo;est pas infaillibre non plus, avec un peu de bonne volont\u00e9 on peut obtenir beaucoup de choses, mais \u00e7a devrait faire l&rsquo;affaire dans la plupart des cas.<\/mark><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-15.png\" alt=\"Le petit Kim se demande par o\u00f9 commencer, il y a tellement de gens \u00e0 surveiller\" class=\"wp-image-28381\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-15.png 640w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-15-300x300.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-15-150x150.png 150w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-15-180x180.png 180w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Scan du r\u00e9seau<\/h2>\n\n\n\n<p>Nous allons tout d&rsquo;abord v\u00e9rifier comment nous apparaissons lorsque nous nous connection sur un r\u00e9seau. Il existe diff\u00e9rentes mani\u00e8res de proc\u00e9der mais pour faire simple et efficace on va tester avec <a href=\"https:\/\/angryip.org\/\" target=\"_blank\" rel=\"noreferrer noopener\">Angry IP Scanner<\/a>. <\/p>\n\n\n\n<p>Pour s&rsquo;assurer qu&rsquo;on ne se trompe pas de machine, qui pour ce test est une machine virtuelle qui s&rsquo;appelle <strong>coucoucestmoi<\/strong>, on va v\u00e9rifier l&rsquo;adresse IP qu&rsquo;on utilise avec <code>ip a<\/code>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"698\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/1.adresseIP_VM-1-1024x698.png\" alt=\"V\u00e9rification de l'adresse IP \" class=\"wp-image-28363\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/1.adresseIP_VM-1-1024x698.png 1024w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/1.adresseIP_VM-1-300x205.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/1.adresseIP_VM-1-768x524.png 768w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/1.adresseIP_VM-1.png 1292w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Maintenant qu&rsquo;on a rep\u00e9r\u00e9 l&rsquo;adresse on peut scanner.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"568\" height=\"228\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/2.scanAvantModif.png\" alt=\"Le nom de la machine appara\u00eet bien sur Angry IP Scanner\" class=\"wp-image-28365\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/2.scanAvantModif.png 568w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/2.scanAvantModif-300x120.png 300w\" sizes=\"auto, (max-width: 568px) 100vw, 568px\" \/><\/figure>\n<\/div>\n\n\n<p>On voit que <strong>coucoucestmoi<\/strong> apparait bien \u00e0 l&rsquo;adresse <code>192.168.178.122<\/code>. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Modifions quelques fichiers<\/h2>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>D\u00e9sactiver la diffusion du nom d&rsquo;h\u00f4te<\/strong><\/h5>\n\n\n\n<p><strong>Raison:<\/strong> Emp\u00eacher la diffusion du nom d&rsquo;h\u00f4te r\u00e9duit la visibilit\u00e9 de la machine sur le r\u00e9seau. Les requ\u00eates <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Address_Resolution_Protocol\" target=\"_blank\" rel=\"noreferrer noopener\">ARP<\/a> (<strong>Address Resolution Protocol<\/strong>) sont utilis\u00e9es pour r\u00e9soudre les <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Adresse_IP\" target=\"_blank\" rel=\"noreferrer noopener\">adresses IP<\/a> en <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Adresse_MAC\" target=\"_blank\" rel=\"noreferrer noopener\">adresses MAC<\/a>. En configurant les param\u00e8tres <strong>ARP<\/strong> pour ignorer ou limiter les annonces <strong>ARP<\/strong>, vous r\u00e9duisez la capacit\u00e9 des autres machines \u00e0 d\u00e9couvrir votre nom d&rsquo;h\u00f4te via ces requ\u00eates.<\/p>\n\n\n\n<p><strong>Technique:<\/strong> Modifiez votre configuration r\u00e9seau pour emp\u00eacher la diffusion de votre nom d&rsquo;h\u00f4te. Cela peut \u00eatre fait en \u00e9ditant le fichier <code>\/etc\/sysctl.conf<\/code> et en ajoutant :<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">text<code>net.ipv4.conf.all.arp_ignore = 1\nnet.ipv4.conf.all.arp_announce = 2\n<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"678\" height=\"488\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/3.1.sysctl_edit.png\" alt=\"Param\u00e8tres arp_ignore et arp_announce dans sysctl.conf\" class=\"wp-image-28366\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/3.1.sysctl_edit.png 678w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/3.1.sysctl_edit-300x216.png 300w\" sizes=\"auto, (max-width: 678px) 100vw, 678px\" \/><\/figure>\n<\/div>\n\n\n<p>Ensuite, ex\u00e9cutez <code>sudo sysctl -p<\/code> pour appliquer les modifications.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"319\" height=\"86\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/3.2.sysctl_apply_modif-1.png\" alt=\"sudo sysctl -p pour appliquer les modifications de sysctl.conf\" class=\"wp-image-28368\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/3.2.sysctl_apply_modif-1.png 319w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/3.2.sysctl_apply_modif-1-300x81.png 300w\" sizes=\"auto, (max-width: 319px) 100vw, 319px\" \/><\/figure>\n<\/div>\n\n\n<h5 class=\"wp-block-heading\"><strong>Modifier la configuration du client DHCP<\/strong><\/h5>\n\n\n\n<p><strong>Raison:<\/strong> Si votre machine envoie son nom d&rsquo;h\u00f4te au serveur <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Dynamic_Host_Configuration_Protocol\" target=\"_blank\" rel=\"noreferrer noopener\">DHCP<\/a>, cela peut \u00eatre visible sur le r\u00e9seau. Le serveur <strong>DHCP<\/strong> peut stocker ces informations et les utiliser pour configurer le r\u00e9seau.<\/p>\n\n\n\n<p><strong>Technique:<\/strong> \u00c9ditez le fichier de configuration du client <strong>DHCP<\/strong> (g\u00e9n\u00e9ralement <code>\/etc\/dhcp\/dhclient.conf<\/code>) pour emp\u00eacher l&rsquo;envoi du nom d&rsquo;h\u00f4te au serveur <strong>DHCP<\/strong>.<\/p>\n\n\n\n<p>Avant modification, vous devriez voir l&rsquo;appel de la fonction <code>gethostname()<\/code>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"645\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.1.dhcpclientAvantModif-1024x645.png\" alt=\"Edition du client DHCP dans dhclient.conf\" class=\"wp-image-28369\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.1.dhcpclientAvantModif-1024x645.png 1024w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.1.dhcpclientAvantModif-300x189.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.1.dhcpclientAvantModif-768x483.png 768w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.1.dhcpclientAvantModif.png 1293w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<p>Vous pouvez la supprimer et garder seulement les guillemets vides.<\/p>\n\n\n\n<p>text<code>send host-name \"\";<\/code><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"646\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.2.dhcpclientApresModif-1024x646.png\" alt=\"Suppresion de la fonction gethostname()\" class=\"wp-image-28370\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.2.dhcpclientApresModif-1024x646.png 1024w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.2.dhcpclientApresModif-300x189.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.2.dhcpclientApresModif-768x484.png 768w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/4.2.dhcpclientApresModif.png 1292w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Gardez \u00e0 l&rsquo;esprit que masquer compl\u00e8tement le nom d&rsquo;h\u00f4te sur un <a href=\"https:\/\/fr.wikipedia.org\/wiki\/R%C3%A9seau_local\" target=\"_blank\" rel=\"noreferrer noopener\">LAN<\/a> peut \u00eatre difficile, car certains <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Protocole_r%C3%A9seau\" target=\"_blank\" rel=\"noreferrer noopener\">protocoles r\u00e9seau<\/a> reposent sur les informations de nom d&rsquo;h\u00f4te pour fonctionner correctement. Ces m\u00e9thodes aideront \u00e0 r\u00e9duire la visibilit\u00e9 du nom d&rsquo;h\u00f4te, mais ne garantissent pas une anonymisation totale sur le r\u00e9seau.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\"><strong>Changer le nom d&rsquo;h\u00f4te en un nom g\u00e9n\u00e9rique<\/strong><\/h5>\n\n\n\n<p><strong>Raison:<\/strong> Changer le nom d&rsquo;h\u00f4te peut aider \u00e0 masquer l&rsquo;identit\u00e9 de la machine, mais cela ne suffit pas pour emp\u00eacher sa d\u00e9couverte sur le r\u00e9seau. Le nom d&rsquo;h\u00f4te est souvent utilis\u00e9 pour identifier une machine sur un r\u00e9seau, et le modifier peut rendre plus difficile pour les autres utilisateurs de savoir \u00e0 quoi correspond votre machine.<\/p>\n\n\n\n<p><strong>Technique:<\/strong> Ouvrez le fichier <code>\/etc\/hostname<\/code>, le nom de la machine devrait \u00eatre assign\u00e9 \u00e0 l&rsquo;adresse locale <code>127.0.0.1<\/code>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"703\" height=\"526\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.1.hostAvantModif.png\" alt=\"Le nom de 127.0.0.1 dans le fichier hostname avant modification\" class=\"wp-image-28371\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.1.hostAvantModif.png 703w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.1.hostAvantModif-300x224.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.1.hostAvantModif-640x480.png 640w\" sizes=\"auto, (max-width: 703px) 100vw, 703px\" \/><\/figure>\n<\/div>\n\n\n<p>Supprimez simplement le nom d&rsquo;h\u00f4te actuel et sauvegardez.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"691\" height=\"511\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.2.hostApresModif.png\" alt=\"Le nom de 127.0.0.1 dans le fichier hostname est maintenant supprim\u00e9\" class=\"wp-image-28372\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.2.hostApresModif.png 691w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/5.2.hostApresModif-300x222.png 300w\" sizes=\"auto, (max-width: 691px) 100vw, 691px\" \/><\/figure>\n<\/div>\n\n\n<h5 class=\"wp-block-heading\"><strong>D\u00e9sactiver mDNS (Multicast DNS)<\/strong><\/h5>\n\n\n\n<p><strong>Raison:<\/strong> <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Zeroconf#Multicast_DNS_(mDNS)\" target=\"_blank\" rel=\"noreferrer noopener\">mDNS<\/a> permet aux machines de r\u00e9soudre les noms d&rsquo;h\u00f4te locaux sans serveur <a href=\"https:\/\/fr.wikipedia.org\/wiki\/Domain_Name_System\" target=\"_blank\" rel=\"noreferrer noopener\">DNS<\/a> centralis\u00e9. D\u00e9sactiver <strong>mDNS<\/strong> r\u00e9duit la visibilit\u00e9 de votre machine sur le r\u00e9seau local, car les autres machines ne pourront plus r\u00e9soudre votre nom d&rsquo;h\u00f4te via ce protocole.<\/p>\n\n\n\n<p><strong>Technique:<\/strong> Si vous utilisez <strong><a href=\"https:\/\/fr.wikipedia.org\/wiki\/Avahi_(logiciel)\" target=\"_blank\" rel=\"noreferrer noopener\">Avahi<\/a><\/strong> pour <strong>mDNS<\/strong>, vous pouvez le d\u00e9sactiver en arr\u00eatant le service avahi-daemon :<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"><code>sudo systemctl stop avahi-daemon<br>sudo systemctl disable avahi-daemon<br>sudo systemctl status avahi-daemon<\/code><\/pre>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"644\" height=\"395\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/6.avahi-disable.png\" alt=\"D\u00e9sactivation de avahi-daemon avec les commandes systemctl \" class=\"wp-image-28373\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/6.avahi-disable.png 644w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/6.avahi-disable-300x184.png 300w\" sizes=\"auto, (max-width: 644px) 100vw, 644px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Nouveau scan du r\u00e9seau<\/h2>\n\n\n\n<p>Moment de v\u00e9rit\u00e9, maintenant que tout est modifi\u00e9 on peut relancer <strong>Angry IP Scanner<\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"575\" height=\"249\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/7.scanApresModification.png\" alt=\"Nouveau scan avec Angry IP Scanner pour v\u00e9rifier la disparition du nom de la machine\" class=\"wp-image-28374\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/7.scanApresModification.png 575w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/7.scanApresModification-300x130.png 300w\" sizes=\"auto, (max-width: 575px) 100vw, 575px\" \/><\/figure>\n<\/div>\n\n\n<p>Pour la m\u00eame <strong>adresse IP<\/strong>, on voit que le <strong>hostname<\/strong> a bien disparu des r\u00e9sultats. <\/p>\n\n\n\n<p>Mission accomplie! <\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"640\" src=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-13.png\" alt=\"Mr Robonymous est content\" class=\"wp-image-28378\" srcset=\"https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-13.png 640w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-13-300x300.png 300w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-13-150x150.png 150w, https:\/\/cryptrz.org\/wordpress\/wp-content\/uploads\/2025\/03\/image-13-180x180.png 180w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Si vous vous connectez r\u00e9guli\u00e8rement sur des r\u00e9seaux qui ne vous appartiennent pas, que ce soit dans un centre commercial, \u00e0 l&rsquo;a\u00e9roport, \u00e0 l&rsquo;h\u00f4tel, ou autres types de r\u00e9seaux publiques,<a href=\"https:\/\/cryptrz.org\/wordpress\/2025\/03\/26\/cacher-le-hostname-sous-linux\/\" class=\"more-link\"><span class=\"readmore\">Continue reading<span class=\"screen-reader-text\">Cacher le hostname sous Linux<\/span><\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[73,105,68,60,133],"tags":[59],"class_list":["post-28345","post","type-post","status-publish","format-standard","hentry","category-internet","category-linux","category-prevention","category-securite","category-vie-privee","tag-tutoriel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cacher le nom d&#039;utilisateur Linux pour plus de s\u00e9curit\u00e9<\/title>\n<meta name=\"description\" content=\"Lorsque vous utilisez des r\u00e9seaux publics, il est conseill\u00e9 de prendre certaines pr\u00e9cautions. 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