Početak›Forumi›Linuks›Linuks umrežavanje›Anti Spam mail proxy
- This topic has 2 odgovora, 2 glasa, and was last updated 18 years, 8 months ranije by dens.
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5. avgust 2005. u 8:02 pm #5884densUčesnik
Za sve one koji odrzavaju neki mail server a jos uvek nisu resili problem SPAM mail-ova, mogu da preporucim veoma efikasnu multiplatformsku aplikaciju:
ASSP radi posao veoma dobro, opremljen je mnogobrojnim mogucnostima, ima dobru dokumentaciju i lako se instalira i podesava i na *nix i na window$ platformama.
Ovih dana ga testiram na windowsu, a za neki dan cu ga podici i na FreeBSD-u. Lako se podesava kroz WEB interfejs. Jedina ¨mana” je sto je pisan u perlu, pa mozda nije najbrzi na svetu, ali je zato veoma efikasan. Buduci da je u pitanju SMTP proxy, moze se koristiti u kombinaciji sa bilo kojim mail serverom (cak i sa exchange-om [FUJ]).
Razliciti scenariji i iskustva korisnika su opisani a ima i aktivan forum… Pa izvol’te. Po svemu sudeci, mnogo je efikasniji i laksi za upotrebu i odrzavanje od famoznog SA (spam assassin).
Evo izvoda iz Feature-a:
1. Easy browser-based setup (optional).
2. Uses your existing message transport and existing SMTP server.
3. Works with Sendmail, qmail, Postfix, Imail, Exchange, Courier, Mercury, Lotus Notes, and all other standard SMTP servers.
4. Runs on Linux, Unix, Windows, OS X, OS/2, and more.
5. Automatically customizes to your site�s unique email profile.
6. Automatic whitelist � noone you email will ever be blocked.
7. Senders receive immediate notification if mail is blocked but no erroneous bounces are ever generated.
8. Basic anti-virus filtering using the ClamAV virus databases.
9. Redlist keeps an address off the whitelist.
10. No-processing addresses pass through.
11. Makes use of honeypot type spambucket addresses to automatically recognize spam and update your spam database.
12. Bayesian filter intelligently classifies email into spam and non-spam.
13. Supports additional site-defined regular expressions to identify spam or non-spam email.
14. Can optionally block all non-whitelisted email (for anti-spam zelots).
15. Mime encoded and other camouflaged spam is also recognized.
16. Automatically maintains the spam and non-spam databases.
17. Accepts whitelist submissions and spam error reports by authorized email.
18. Optionally rejects executable attachments from non-whitelisted (or all) addresses.
19. Free (as in speech) software — Licensed under the GPL.
20. Practically no maintenance required.
21. Active user community and email list for support questions.
22. Source code included if you need to customize your installation.
23. Runs as a service in Windows NT / 2000.
24. Optionally blocks no mail but adds an email header and/or updates the message subject.
25. Optionally uses community-based spam statistics to identify hosts that are likely to send spam or non-spam mail.
26. In *nix environments can switch to non-root user. Also supports chroot jail.
27. Individual users can be configured to receive all mail.
28. Shows detailed analysis of spam rating process for specific messages.
29. Option to forward a copy of every rejected mail to an address.
30. No perl modules to install — runs complete “out of the box”.
31. Can block spam-bombs (when spammers forge your domain in the from field).
32. Keeps spam statistics for your site.
33. Detailed up-to-date documentation.
34. Can listen on more than one smtp port.
35. And much more!Pozdrav i nadam se da ce ovo nekome koristiti kao sto meni koristi.
8. avgust 2005. u 1:39 pm #32149babeaUčesnikJa koristim postfix i spamassassin kao smtp proxy. To radi dosta dobro ali sam imao puno “rucnog” posla dok nisam sve podesio. Recimo da je sada uspesnost detektovanja spam poruka visa od 80%.
Inace u proseku dnevno na mail server nam dolazi 22000 mailova od kojih su 5000 spam.8. avgust 2005. u 6:11 pm #32150densUčesnikNa zalost efikasnost SpamAssasin-a ne mogu da komentarisem iz licnog iskustva ili na bazi ciste instalacije (Trenutno ga imam implementiranog u komercijalni mail server od strane proizvodjaca softvera i radi lose, ili da kazem veoma lose).
ASSP kod mene za sada radi odlicno, a to je u skladu sa onim sto sam procitao na samom sajtu. Kod mene naravno ne dolazi toliko mailova dnevno, ali je ipak procenat spama veliki.
Glavna stvar je sto se veoma jednostavno instalira. Prva proba ide sa:
perl assp.pl (ne moz’ biti prostije), onda -> web browser:
http://127.0.0.1:55555
i podesis ostalo…Krene u test modu (sto je kod mene i dalje u toku) i za to vreme samo ubacuje hedere sa svojom procenom da li je nesto SPAM ili nije. Kad dobijes reprezentativni uzorak (oko 400 spam poruka), i rucno preraspodelis greske u njegovoj proceni, rebilduje se baza i iskljuci test mod… i on pocinje da radi svoj posao.
Ako neki SPAM ipak zaluta, svaki korisnik samo taj mail forwarduje na odgovarajucu adresu i ASSP iz toga uci…
Jedina mana je sto je u pitanju kod u perlu (sto mu je i dobra osobina jer je portabilan 100%), tako da kao sto sam rekao, nije bas svetski prvak u brzini. Ali na sajtu ima primera sa implementacijama gde je protok mailova veci od tvog i nekoliko puta, tako da to i nije uz dobar hardver u prevelikoj meri usko grlo…
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