{"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\/et\/blog\/news\/skanirovnie-portov-privelo-k-blokirovke-podseti-provajderom-iz-za-popadaniya-v-spisok-uceprotect","title":{"rendered":"Portide skaneerimine viis proviideri poolt alamv\u00f5rgu blokeerimise UCEPROTECTi loendis,","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Vincent Canfield, e-posti teenuse ja hostimis-reselleri cock.li administraator, avastas, et kogu tema IP-v\u00f5rk kantakse automaatselt DNSBL UCEPROTECT\u2019i musta nimekirja naabervirtuaalsete masinate portide skannimise t\u00f5ttu. Vincendi alamv\u00f5rk sattus Level 3 nimekirja, kus blokeeritakse autonoomsete s\u00fcsteemide numbrite alusel ja see h\u00f5lmab terveid alamv\u00f5rke, millelt on korduvalt ja erinevate aadresside puhul aktiveeritud sp\u00e4mmi avastamise mehhanismid. Selle tulemusena keelas teenusepakkuja M247 \u00fche tema v\u00f5rgu BGP anunntse, peatades sisuliselt teenuse. <\/p>\n

Probleem seisneb selles, et valeandmed serverid<\/a> UCEPROTECT, mis teesklevad olema avatud relayed ja registreerivad p\u00fc\u00fcdeid postitamise katseteks, lisavad aadresse automaatselt blokeerimisnimekirja igasuguse v\u00f5rguaktiivsuse alusel, ilma et v\u00f5rgu\u00fchenduse loomise seadistust kontrollitaks. Sarnast blokeerimismeetodit rakendab ka projekt Spamhaus. <\/p>\n

Blokeerimisnimekirja sattumiseks piisab \u00fche TCP SYN paketi saatmisest, mida kurjategijad v\u00f5ivad \u00e4ra kasutada. Eriti kuna kahepoolset kinnitust TCP-\u00fchenduse jaoks ei ole vajalik, on spoofimise teel v\u00f5imalik saata pakett vale aadressiga IP-aadressid<\/a> ja algatada blokeerimise mis tahes masina jaoks. Kui simuleerida aktiivsust mitme aadressiga, on v\u00f5imalik saavutada blokeeringu eskaleerimist Level 2 ja Level 3 tasemetele, mis blokeerivad alamv\u00f5rkude ja autonoomsete s\u00fcsteemide numbrite alusel. <\/p>\n

Level 3 nimekiri loodi algselt, et v\u00f5idelda teenusepakkujatega, kes soosivad klientide pahatahtlikku tegevust ja ei reageeri kaebustele (n\u00e4iteks hostimisteenused, mis on loodud ebaseadusliku sisu majutamiseks v\u00f5i sp\u00e4mmerite teenindamiseks). M\u00f5ned p\u00e4evad tagasi muutis UCEPROTECT Level 2 ja Level 3 nimekirja reegleid, mis viis agressiivsema filtreerimise ja nimekirjade suuruse suurenemiseni. N\u00e4iteks kasvas Level 3 nimekirja sissekannete arv 28-lt 843 autonoomsete s\u00fcsteemideni. <\/p>\n

UCEPROTECT\u2019ile vastukaaluks on esitatud idee kasutada skannimisel v\u00f5rguadresside spoofimist UCEPROTECT'i sponsorite IP-diest. Tulemuseks on see, et UCEPROTECT lisas oma toetajate ja paljude teiste s\u00fc\u00fctu aadresse oma andmebaasi, mis tekitas probleeme e-kirjade edastamisel. Sealhulgas sattus blokeerimisnimekirja ka ettev\u00f5tte Sucuri CDN-v\u00f5rk.
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Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412\u0438\u043d\u0441\u0435\u043d\u0442 \u041a\u044d\u043d\u0444\u0438\u043b\u0434 (Vincent Canfield), \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440 \u043f\u043e\u0447\u0442\u043e\u0432\u043e\u0433\u043e \u0441\u0435\u0440\u0432\u0438\u0441\u0430 \u0438 \u0445\u043e\u0441\u0442\u0438\u043d\u0433\u0430-\u0440\u0435\u0441\u0435\u043b\u043b\u0435\u0440\u0430 cock.li, \u043e\u0431\u043d\u0430\u0440\u0443\u0436\u0438\u043b, \u0447\u0442\u043e \u0432\u0441\u044e \u0435\u0433\u043e IP-\u0441\u0435\u0442\u044c \u0430\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u0432\u043d\u0435\u0441\u043b\u0438 \u0432 \u0441\u043f\u0438\u0441\u043e\u043a DNSBL UCEPROTECT \u0437\u0430 \u0441\u043a\u0430\u043d\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u0435 \u043f\u043e\u0440\u0442\u043e\u0432 \u0441 \u0441\u043e\u0441\u0435\u0434\u043d\u0438\u0445 \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d. 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-99147","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Portide skaneerimine p\u00f5hjustas alamv\u00f5rgu blokeerimise teenusepakkuja poolt nimekirja UCEPROTECT sattumise t\u00f5ttu | ProHoster","description":"Vincent Canfield, e-posti teenuse ja hostimis-reselleri cock.li administreerija, avastas, et kogu tema IP-v\u00f5rk kantakse automaatselt nimekirja DNSBL UCEPROTECT portide skaneerimise t\u00f5ttu 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