D-Link DSR-250v2 Product Manual 2 - Page 73

H.323, IPSec Passthrough, Field, Description, Policy, Subject, Email address, Add icon, Delete icon

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SIP H.323 TFTP SMTP IPSec Passthrough L2TP Passthrough PPTP Passthrough Enable it to allow devices and applications using VoIP (Voice over IP) to communicate across NAT. Enable it to allow H.323 (specifically Microsoft Netmeeting) clients to communicate across NAT. Enable it to allow Trivial FTP (TFTP) clients and servers to transfer data across NAT. Enable it to transfer email between mail servers over the Internet and enter the port at which the SMTP packets are inspected. Enable this feature to allow encrypted VPN traffic for IPSec VPN tunnel connections through the device. Enable this feature to allow encrypted VPN traffic for L2TP VPN tunnel connections through the device. Enable this feature to allow encrypted VPN traffic for PPTP VPN tunnel connections through the device. E-mail filter list The E-mail filter list appears only when the SMTP is enabled. Simple Mail Transfer Protocol (SMTP) is a text-based protocol used for transferring emails between mail servers over the Internet. Typically, the local SMTP server is located on a DMZ so that mail sent by remote SMTP servers traverses the router to reach the local server. Local users then use email client software to retrieve their email from the local SMTP server. SMTP is also used when clients send emails. In addition, SMTP ALG can monitor SMTP traffic originating from both clients and servers. The table lists all the subjects along with email addresses that are blocked or allowed. Field Policy Subject Email address Description It displays the policy to allow or block the email address. It displays the subject. It displays the email address. Click Add icon to open a row to Add Email filter to add a new entry. To delete multiple entries at once, select the checkboxes of the entries you want to delete, and click Delete icon.

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SIP
Enable it to allow devices and applications using VoIP (Voice over IP) to communicate
across NAT.
H.323
Enable it to allow H.323 (specifically Microsoft Netmeeting) clients to communicate across
NAT.
TFTP
Enable it to allow Trivial FTP (TFTP) clients and servers to transfer data across NAT.
SMTP
Enable it to transfer email between mail servers over the Internet and enter the
at which
port
the SMTP packets are inspected.
IPSec Passthrough
Enable this feature to allow encrypted VPN traffic for IPSec VPN tunnel connections through
the device.
L2TP Passthrough
Enable this feature to allow encrypted VPN traffic for L2TP VPN tunnel connections through
the device.
PPTP Passthrough
Enable this feature to allow encrypted VPN traffic for PPTP VPN tunnel connections through
the device.
E-mail filter list
The
appears only when the SMTP is enabled. Simple Mail Transfer Protocol (SMTP) is a text-based protocol used for transferring
E-mail filter list
emails between mail servers over the Internet. Typically, the local SMTP server is located on a DMZ so that mail sent by remote SMTP servers
traverses the router to reach the local server. Local users then use email client software to retrieve their email from the local SMTP server. SMTP
is also used when clients send emails. In addition, SMTP ALG can monitor SMTP traffic originating from both clients and servers.
The table lists all the subjects along with email addresses that are blocked or allowed.
Field
Description
Policy
It displays the policy to allow or block the email address.
Subject
It displays the subject.
Email address
It displays the email address.
Click
to open a row to
to add a new entry. To delete multiple entries at once, select the checkboxes of the entries you
Add icon
Add Email filter
want to delete, and click
.
Delete icon