{"id":99147,"date":"2021-02-16T16:22:36","date_gmt":"2021-02-16T14:22:36","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/skanirovnie-portov-privelo-k-blokirovke-podseti-provajderom-iz-za-popadaniya-v-spisok-uceprotect"},"modified":"2021-02-16T16:22:36","modified_gmt":"2021-02-16T14:22:36","slug":"skanirovnie-portov-privelo-k-blokirovke-podseti-provajderom-iz-za-popadaniya-v-spisok-uceprotect","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/skanirovnie-portov-privelo-k-blokirovke-podseti-provajderom-iz-za-popadaniya-v-spisok-uceprotect","title":{"rendered":"La scansione delle porte ha portato al blocco della sottorete da parte del provider a causa dell'inserimento nella lista UCEPROTECT","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Vincent Canfield, amministratore del servizio email e rivenditore di hosting cock.li, ha scoperto che l'intera sua rete IP \u00e8 stata automaticamente inserita nella lista DNSBL UCEPROTECT a causa della scansione delle porte proveniente da macchine virtuali vicine. La subnet di Vincent \u00e8 finita nella lista di livello 3, in cui il blocco avviene per numero di sistemi autonomi e abbraccia intere sottoreti da cui si sono attivati pi\u00f9 volte i rilevatori di spam per indirizzi diversi. Di conseguenza, il fornitore M247 ha disabilitato l'annuncio di una delle sue reti in BGP, sospendendo effettivamente il servizio. <\/p>\n

Il problema \u00e8 che i finti server<\/a> UCEPROTECT, che si spacciano per rel\u00e8 aperti e registrano i tentativi di invio di posta attraverso di essi, aggiungono automaticamente gli indirizzi alla lista di blocco sulla base di qualsiasi attivit\u00e0 di rete, senza controllare l'instaurazione della connessione di rete. Un metodo simile di inserimento nella lista di blocco \u00e8 utilizzato anche dal progetto Spamhaus. <\/p>\n

Per entrare nella lista di blocco, \u00e8 sufficiente inviare un pacchetto TCP SYN, sfruttabile da malintenzionati. In particolare, poich\u00e9 non \u00e8 richiesta una conferma bidirezionale della connessione TCP, \u00e8 possibile utilizzare lo spoofing per inviare un pacchetto con un indirizzo falso Indirizzi IP<\/a> e iniziare a bloccare qualsiasi host. Simulando attivit\u00e0 da pi\u00f9 indirizzi, \u00e8 possibile ottenere un'escalation della blocco ai livelli Level 2 e Level 3, che eseguono il blocco per sottoreti e numeri di sistemi autonomi. <\/p>\n

La lista Level 3 \u00e8 stata originariamente creata per combattere i fornitori che incoraggiano attivit\u00e0 dannose dei clienti e non rispondono ai reclami (ad esempio, hosting creati apposta per ospitare contenuti illegali o per servire spammer). Alcuni giorni fa, UCEPROTECT ha modificato le regole di inclusione nelle liste Level 2 e Level 3, portando a un filtraggio pi\u00f9 aggressivo e a un aumento delle dimensioni delle liste. Ad esempio, il numero di voci nella lista Level 3 \u00e8 aumentato da 28 a 843 sistemi autonomi. <\/p>\n

Per contrastare UCEPROTECT \u00e8 stata proposta l'idea di utilizzare il spoofing degli indirizzi IP provenienti dall'intervallo dei sostenitori di UCEPROTECT durante la scansione. Di conseguenza, UCEPROTECT ha incluso negli suoi database gli indirizzi dei propri sostenitori e di molti altri innocenti, causando problemi nella consegna delle email. Anche la rete CDN della societ\u00e0 Sucuri \u00e8 stata inserita nella lista nera.
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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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La sottorete di Vincent \u00e8 finita nella lista di livello 3, in cui il blocco avviene in base ai numeri dei sistemi autonomi e comprende intere sottoreti da cui sono scattate ripetutamente richieste per diversi indirizzi.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/novosti-interneta\/skanirovnie-portov-privelo-k-blokirovke-podseti-provajderom-iz-za-popadaniya-v-spisok-uceprotect","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0421\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u043d\u0438\u0435 \u043f\u043e\u0440\u0442\u043e\u0432 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