{"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\/novosti-interneta\/skanirovnie-portov-privelo-k-blokirovke-podseti-provajderom-iz-za-popadaniya-v-spisok-uceprotect","title":{"rendered":"Portide skanneerimine viis pakkuja subnetti blokeerimiseni, kuna see sattus UCEPROTECT nimekirja","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Vincent Canfield, e-posti teenuse ja cock.li hulgihostingute administraator, avastas, et kogu tema IP-v\u00f5rk oli automaatselt kantud DNSBL UCEPROTECTi nimekirja portide skaneerimise t\u00f5ttu naabervirtuaalmasinatelt. Vincenti alamv\u00f5rk sattus Level 3 nimekirja, kus blokeerimine toimub autonoomsete s\u00fcsteemide numbrite j\u00e4rgi ja h\u00f5lmab terveid alamv\u00f5rke, millelt on korduvalt ja erinevate aadresside kaudu tuvastatud r\u00e4mpsposti saatmise katsete tegemist. Selle tulemusena katkestas teenusepakkuja M247 \u00fche tema v\u00f5rkude BGP v\u00e4ljakuulutamise, sisuliselt peatades teenuse. <\/p>\n

Probleem seisneb selles, et valeisiku serverid<\/a> UCEPROTECT, mis k\u00e4ituvad nagu avatud releed ja registreerivad p\u00fc\u00fcdeid e-kirjade saatmiseks enda kaudu, lisavad automaatselt aadresse blokeerimisnimekirja igasuguse v\u00f5rguaktiivsuse p\u00f5hjal, ilma et kontrollitaks v\u00f5rgu\u00fchenduse seadistust. Sarnast blokeerimise meetodit rakendab ka Spamhaus. <\/p>\n

Blokeerimisse nimekirja sattumiseks piisab \u00fche TCP SYN-paketi saatmisest, mida r\u00fcndajad v\u00f5ivad \u00e4ra kasutada. Eriti kuna TCP-\u00fchenduse kahetasandilist kinnitust ei n\u00f5uta, saab spoofimise abil saata paketi vale aadressiga. IP-aadressid<\/a> ja algatada \u00fcksk\u00f5ik millise hosti blokeerimise. Mitme aadressiga aktiivsuse simuleerimise abil on v\u00f5imalik saavutada blokeerimise t\u00f5stmine tasemetele Level 2 ja Level 3, mis blokeerivad alad ja autonoomsete s\u00fcsteemide numbrid. <\/p>\n

Level 3 nimekiri loodi algselt klientide kuritegeliku tegevuse soosimise ja kaebustele reageerimise puudumise t\u00f5ttu proviisorite vastu (n\u00e4iteks hosting-teenused, mis on loodud ebaseadusliku sisu majutamiseks v\u00f5i sp\u00e4mmerite teenindamiseks). M\u00f5ned p\u00e4evad tagasi muutis UCEPROTECT Level 2 ja Level 3 nimekirja sisenemise reegleid, mis viis agressiivseama filtreerimise ja nimekirjade mahu suurenemiseni. N\u00e4iteks kasvas Level 3 nimekirja sissekannete arv 28-lt 843 autonoomse s\u00fcsteemi v\u00f5rreldes. <\/p>\n

UCEPROTECTi vastasuse tagamiseks esitati idee kasutada skaneerimisel IP-aadresse, mis on UCEPROTECTi sponsorite vahemikust. L\u00f5pptulemusena lisas UCEPROTECT oma sponsorite ja paljude teiste s\u00fc\u00fctute aadresse oma andmebaasidesse, mis tekitas probleeme meilide edastamisel. Sealhulgas sattus blokeerimisnimekirja ettev\u00f5tte Sucuri CDN-v\u00f5rk.
\n
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. \u041f\u043e\u0434\u0441\u0435\u0442\u044c \u0412\u0438\u043d\u0441\u0435\u043d\u0442\u0430 \u043f\u043e\u043f\u0430\u043b\u0430 \u0432 \u0441\u043f\u0438\u0441\u043e\u043a Level 3, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0430 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e \u043d\u043e\u043c\u0435\u0440\u0430\u043c \u0430\u0432\u0442\u043e\u043d\u043e\u043c\u043d\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0438 \u043e\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u0446\u0435\u043b\u044b\u0435 \u043f\u043e\u0434\u0441\u0435\u0442\u0438, \u0441 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043c\u043d\u043e\u0433\u043e\u043a\u0440\u0430\u0442\u043d\u043e \u0438 \u0434\u043b\u044f \u0440\u0430\u0437\u043d\u044b\u0445 \u0430\u0434\u0440\u0435\u0441\u043e\u0432 \u0441\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u043b\u0438 […]<\/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-novosti-interneta"],"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 t\u00f5i kaasa alamv\u00f5rgu blokeerimise teenusepakkuja poolt, kuna see sattus UCEPROTECTi nimekirja | ProHoster","description":"Vincent Canfield, postiteenuse ja hostingu edasim\u00fc\u00fcja cock.li administraator, avastas, et kogu tema IP-v\u00f5rk lisati automaatselt UCEPROTECTi DNSBL nimekirja portide skaneerimise t\u00f5ttu naabervirtuaalsetelt masinatelt. 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