{"id":696,"date":"2014-09-05T04:45:00","date_gmt":"2014-09-05T04:45:00","guid":{"rendered":"https:\/\/dev.railscarma.com\/secure-your-server-with-ssh-access\/"},"modified":"2021-06-07T07:23:57","modified_gmt":"2021-06-07T07:23:57","slug":"proteggi-il-tuo-server-con-laccesso-ssh","status":"publish","type":"post","link":"https:\/\/www.railscarma.com\/it\/blog\/gestione\/proteggi-il-tuo-server-con-laccesso-ssh\/","title":{"rendered":"Proteggi il tuo server con l&#039;accesso SSH"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"696\" class=\"elementor elementor-696\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4ffe6cb6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4ffe6cb6\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-c9b1726\" data-id=\"c9b1726\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-709d966f elementor-widget elementor-widget-text-editor\" data-id=\"709d966f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: justify;\">Secure Shell (SSH), talvolta noto come Secure Socket Shell, \u00e8 un&#039;interfaccia di comando e un protocollo basato su UNIX per ottenere l&#039;accesso in modo sicuro a un computer remoto. \u00c8 ampiamente utilizzato dagli amministratori di rete per controllare da remoto il Web e altri tipi di server.<\/p>\n<p style=\"text-align: justify;\"><strong>SSH<\/strong> \u00e8 in realt\u00e0 una suite di tre utilit\u00e0 \u2013 slogin, ssh e scp \u2013 che sono versioni sicure delle precedenti utilit\u00e0 UNIX, rlogin, rsh e rcp. I comandi SSH sono crittografati e protetti in diversi modi. Entrambe le estremit\u00e0 della connessione client\/server vengono autenticate utilizzando un certificato digitale e le password sono protette tramite crittografia.<\/p>\n\n<div style=\"text-align: justify;\">\n\nQueste misure possono essere adottate per proteggere il tuo server, con accesso SSH. Aggiorna il sistema operativo, Apache e CPanel alle ultime versioni stabili. Questo pu\u00f2 essere fatto da WHM\/CPanel. Limitare l&#039;accesso SSH Per limitare e proteggere l&#039;accesso SSH, associare sshd a un singolo IP diverso dall&#039;IP principale del server e su una porta diversa dalla porta 22. SSH nel server e accedere come root. Al prompt dei comandi digitare: vi \/etc\/ssh\/sshd_config Scorrere verso il basso fino alla sezione del file simile a questa: Port 22 Protocol 2, 1 ListenAddress 0.0.0.0 ListenAddress :: Decommenta e modifica la porta 22 in modo che assomigli alla porta 5678 (scegli il tuo numero di porta da 4 a 5 cifre (49151 \u00e8 il numero di porta pi\u00f9 alto) Decommenta e cambia Protocol 2, 1 in modo che assomigli a Protocol 2 Decommenta e cambia ListenAddress 0.0.0.0 in modo che assomigli a ListenAddress 123.123.123.15 (usa uno dei tuoi indirizzi IP che \u00e8 stato assegnato al tuo server) Nota 1: se desideri disabilitare il login root diretto, scorri verso il basso fino a trovare PermitRootLogin s\u00ec e decommentalo e fallo sembrare PermitRootLogin no Salva premendo Ctrl o sulla tastiera, quindi esci premendo Ctrl x sulla tastiera. Nota 2: puoi anche creare un server dei nomi personalizzato appositamente per il tuo nuovo indirizzo IP SSH. Basta crearne uno chiamato qualcosa come ssh.xyz.com o qualsiasi altra cosa. Assicurati di aggiungere un indirizzo A alla tua zona per il nuovo server dei nomi. Ora riavvia SSH Al prompt dei comandi digitare: \/etc\/rc.d\/init.d\/sshd restart Esci da SSH, quindi accedi nuovamente a SSH utilizzando il nuovo IP o server dei nomi e la nuova porta . Nota: se dovessi riscontrare problemi, collega semplicemente Telnet al tuo server, risolvi il problema, quindi esegui nuovamente l&#039;accesso SSH. Telnet \u00e8 un protocollo molto non sicuro, quindi cambia la password di root dopo averlo utilizzato. Disabilitare Telnet Per disabilitare Telnet, accedere tramite SSH al server e accedere come root. Al prompt dei comandi digitare: vi \/etc\/xinetd.d\/telnet cambia disabilita = no in disabilita = s\u00ec Salva ed esci Al prompt dei comandi digita: \/etc\/init.d\/xinetd riavvia il server invia un&#039;e-mail ogni volta che qualcuno accede come root A chiedi al server di inviarti un&#039;e-mail ogni volta che qualcuno accede come root, SSH nel server e accedi come root. Al prompt dei comandi digitare: pico .bash_profile Scorrere fino alla fine del file e aggiungere la seguente riga: echo &#039;ALERT \u2013 Root Shell Access on:&#039; <code>data<\/code> <code>Chi<\/code> | mail -s \u201cAvviso: accesso root da <code>chi | awk &#039;{stampa $6}&#039;<\/code>&#8221; <a href=\"mailto:your@email.com\">tuo@email.com<\/a>\n\nSalva ed esci. Imposta un messaggio legale SSH Per un messaggio legale SSH, accedi tramite SSH al server e accedi come root. Al prompt dei comandi digita: vi \/etc\/motd Inserisci il tuo messaggio, salva ed esci. Nota: utilizzo il seguente messaggio... ALERT! Stai entrando in un&#039;area protetta! Il tuo IP e le informazioni di accesso sono stati registrati. L&#039;amministrazione del sistema \u00e8 stata avvisata. Questo sistema \u00e8 limitato solo agli accessi autorizzati. Tutte le attivit\u00e0 su questo sistema vengono registrate e registrate. L&#039;accesso non autorizzato verr\u00e0 indagato a fondo e segnalato alle forze dell&#039;ordine appropriate.\u00e2\u20ac Ora ogni volta che qualcuno accede come root, vedr\u00e0 questo messaggio... Disabilita account Shell Disabilita output di identificazione per Apache Per disabilitare l&#039;output della versione per proftp, SSH nel server e accedi come root. Al prompt dei comandi digitare: vi \/etc\/httpd\/conf\/httpd.conf Scorrere (molto) verso il basso e modificare la riga seguente in ServerSignature Off Restart Apache Al prompt dei comandi digitare: \/etc\/rc.d\/init.d\/httpd restart\n\n<\/div>\n<a href=\"\/it\/contattaci\/\">Mettiti in contatto con noi.<\/a>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-b90780f elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"b90780f\" data-element_type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-649816f9\" data-id=\"649816f9\" 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It is widely used by network administrators to control Web and other kinds of servers remotely. SSH is actually a suite of three utilities &#8211; slogin, ssh, and scp &#8211; that &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/www.railscarma.com\/it\/blog\/rails-link_to-method-the-complete-guide-with-examples\/\"> <span class=\"screen-reader-text\">Metodo Rails link_to: Guida completa con esempi<\/span> Leggi altro \"<\/a><\/p>","protected":false},"author":1,"featured_media":32117,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[385],"tags":[448,593,594,595],"class_list":["post-696","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-management","tag-server","tag-server-with-ssh-access","tag-slogin","tag-ssh"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Secure your server with SSH access<\/title>\n<meta name=\"description\" content=\"SSH is UNIX-based command interface &amp; protocol for securely getting access to remote computer. 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