Podjetje Proxmox, znano po razvoju distribucije Proxmox Virtual Environment za postavitev infrastrukture virtualnih strežnikov, je predstavilo različico distribucije Proxmox Mail Gateway 9.1, ki se predstavlja kot končna rešitev za hitro vzpostavitev sistema nadzora nad poštnim prometom in zaščito notranjega poštnega strežnika.
Namestitvena ISO-slika je na voljo za prost prenos. Specifične komponente distribucije so odprte pod licenco AGPLv3. Za namestitev posodobitev sta na voljo tako plačljiv Enterprise repozitorij kot dva brezplačna repozitorija, ki se razlikujeta po stopnji stabilizacije posodobitev. Sistemski del distribucije temelji na paketni bazi Debian. Možna je namestitev komponent Proxmox Mail Gateway na že delujoče strežnike na osnovi Debiana.
Proxmox Mail Gateway deluje kot proxy-strežnik, ki deluje kot prehod med zunanjim omrežjem in notranjim poštnim strežnikom na osnovi MS Exchange, Lotus Domino ali Postfix. Na voljo je upravljanje vseh prihajajočih in odhajajočih tokov poštne korespondence. Vsi dnevniški zapisi korespondence se analizirajo in so dostopni za analizo prek spletnega vmesnika. Na voljo so tako grafi za oceno skupne dinamike kot različna poročila in obrazci za pridobivanje informacij o določenih sporočilih in stanju dostave. Podpirajo se klasterske konfiguracije za zagotavljanje visoke razpoložljivosti (vodenje sinhroniziranega varnostnega strežnika, podatki se sinhronizirajo prek SSH-tunela) ali uravnoteženje obremenitve.
Na voljo je nabor orodij za zagotavljanje zaščite, filtriranje neželene pošte, phishinga in virusov. Za blokiranje zlonamernih priponk se uporablja ClamAV in baza Google Safe Browsing, medtem ko ponudba proti neželeni pošti vključuje vrsto ukrepov, temelječih na SpamAssassin, ki vsebujejo podporo za povratno preverjanje pošiljatelja, SPF, DNSBL, sive sezname, sistem bayesovske klasifikacije in blokiranje na podlagi seznama neželene pošte URI.
Za legitimno korespondenco je na voljo fleksibilen sistem filtrov, ki omogoča določanje pravil obdelave pošte glede na domeno, prejemnika/pošiljatelja, čas prejemanja in vrsto vsebine.
Glavne novosti:
- Ssuccessfully synchronized with the Debian 13.5 package base. The Linux kernel has been updated to release 7.0. The ZFS file system implementation has been updated to OpenZFS 2.4. The versions of the spam filtering system SpamAssassin 4.0.2, antivirus package ClamAV 1.4.4, and database management system PostgreSQL 17 have been upgraded.
- The web interface for managing problematic email quarantine has been improved. The interface is optimized for use on both stationary computers and mobile devices. Users can now mark emails viewed, placed in quarantine from shared mailboxes, to avoid double-checking by different people. The quarantine report now displays not only the final spam score but also the individual positive and negative components for a clearer understanding of the reason for email filtering.
An option has been added to load images present in emails placed in quarantine only after explicitly requesting their display by clicking the 'Load Images' button. An option has been added to the admin panel.
The 'Copy Link' option has been added to obtain a link to access the email located in quarantine. - Support for client-side backup encryption and management of the keys used for encryption has been added. In this mode, not only the backed-up data is encrypted but also associated metadata such as email settings, filtering rules, and statistics. An optional master key can be set for recovery.
- An option has been added to initiate a backup check and view the encryption and verification status for each snapshot.
- Support for adding announcements displayed before entering the administration interface, such as displaying notes about usage, has been implemented.
- Support for logging the sender's address of each email given during the SMTP session has been added, as well as the decoded contents of the From, To, and Subject headers for auditing.
Izvor: opennet.ru
