16 Appendix
738
Appendix
16
NAT/NAPT
Communication protocols that transmit UPnP, TURN, STUN, ICE, and UDP hole punching
in SIP communications are not supported. IP Fax (SIP) does not work in an environment
that uses NAT/NAPT devices including ALG.
Notes and Restrictions when Connecting with Internet Service Provider
This section describes notes and restrictions to observe when using features that transmit e-
mails or Internet faxes using an Internet service provider (ISP).
The features related to e-mail are as follows:
E-mail
E-mail Notification Service
Print E-mail
Internet Fax
Notes and Restrictions on Accessing ISP
Observe the following notes and restrictions when connecting the machine to ISP:
Dial-up connection is not supported. Continuous connection is required.
Connect the machine in an environment using IP masquerade. Assigning a global IP
address to the machine is not supported.
Be sure to assign an exclusive e-mail account to the machine for POP reception. Sharing
an e-mail account with other users may cause troubles.
Be sure to set size limitation for sending e-mail. Although the applicable e-mail size may
vary depending on the ISP used, we recommend that you set a small value.
Although continuous connection other than ADSL or cable connection is also supported,
the reception of image data significantly burdens the machine.
SMTP reception is not supported. This machine supports only POP reception.
When installing the machine in an environment that is operating a mail transfer agent
(MTA) in a private segment, set the machine to adapt to the operation system being used.
For information about supported ISPs, contact our Customer Support Center.
When received via POP, the fax cannot be sent using the Fax Gateway feature. This is
because POP receiving does not forward an Internet fax document received by e-mail to
the fax machine.
Feature Specifications
Details of the features related to e-mail are as follows:
Transmission specifications
Authentication for transmission
Supported protocol : SMTP
Port number : 25 (default)
SMTP authentication : AUTH GSSAPI (only for Kerberos), AUTH
NTLMv2, AUTH NTLMv1, AUTH
PLAIN,AUTH LOGIN, and AUTH CRAM-
MD5