Ports and servers used by Kaspersky Secure Mail Gateway

The list of ports and servers used by Kaspersky Secure Mail Gateway:

Updater-servers (TCP, port 80)
dnl-01.geo.kaspersky.com
dnl-02.geo.kaspersky.com
dnl-03.geo.kaspersky.com
dnl-04.geo.kaspersky.com
dnl-05.geo.kaspersky.com
dnl-06.geo.kaspersky.com
dnl-07.geo.kaspersky.com
dnl-08.geo.kaspersky.com
dnl-09.geo.kaspersky.com
dnl-10.geo.kaspersky.com
dnl-11.geo.kaspersky.com
dnl-12.geo.kaspersky.com
dnl-13.geo.kaspersky.com
dnl-14.geo.kaspersky.com
dnl-15.geo.kaspersky.com
dnl-16.geo.kaspersky.com
dnl-17.geo.kaspersky.com
dnl-18.geo.kaspersky.com
dnl-19.geo.kaspersky.com
dnl-00.geo.kaspersky.com

KSN servers (TCP, port 443)

ksn-crypto-file-geo.kaspersky-labs.com
ksn-crypto-a-stat-geo.kaspersky-labs.com
ksn-crypto-url-geo.kaspersky-labs.com
ksn-crypto-verdict-geo.kaspersky-labs.com
ksn-crypto-kas-geo.kaspersky-labs.com
ksn-crypto-a-stat-geo.kaspersky-labs.com 

Please note: The KSN servers may be changed without any notifications.

Moebius (TCP, port 443) aka Enforced Anti-Spam Update Service
sget35.kaspersky-labs.com
sget27.kaspersky-labs.com

NTP (UDP, port 123)
0.centos.pool.ntp.org
1.centos.pool.ntp.org
2.centos.pool.ntp.org

DNS (UDP, 53)
Administrator specifies the servers manually

SURBL, DNSBL

DNS requests to the servers present in anti-spam databases and specified by the administrator

SMTP (TCP, 25)

All incoming/outgoing messages