ZyXEL Communications LTE3202-M430, Руководство пользователя, Страница: 75 / 117

Chapter 10 NAT
LTE3202-M430 User’s Guide
75
Figure 52 Configuration > NAT > ALG
The following table describes the labels in this screen.
10.5 The Pass Through Screen
Use this screen to enable NAT and enable/disable the ALGs (Application Layer Gateways) in the
LTE3202-M430. Click
Configuration > NAT > Pass through to open the following screen.
Table 34 Configuration > NAT > ALG
LABEL DESCRIPTION
ALG
FTP ALG Select this check box to allow FTP sessions to pass through the LTE3202-M430. FTP (File Transfer
Protocol) is a protocol that enables fast transfer of files, including large files that may not be
possible by e-mail.
TFTP ALG Select this check box to allow TFTP sessions to pass through the LTE3202-M430. TFTP (Trivial File
Transfer Protocol) is an Internet File Transfer Protocol similar to FTP, but uses UDP (User Datagram
Protocol) rather than TCP (Transmission Control Protocol).
PPTP ALG Select this check box to enable PPTP ALG on the LTE3202-M430 to detect PPTP traffic and help
build PPTP sessions through the LTE3202-M430’s NAT.
RSTP ALG Select this check box to have the LTE3202-M430 detect RSTP traffic and help build RTSP sessions
through its NAT. The Real Time Streaming (media control) Protocol (RSTP) is a remote control for
multimedia on the Internet.
SIP ALG Select this check box to allow SIP sessions to pass through the LTE3202-M430. SIP is a signaling
protocol used in VoIP (Voice over IP), the sending of voice signals over Internet Protocol.
Apply Click Apply to save your changes back to the LTE3202-M430.
Cancel Click Cancel to reload the previous configuration for this screen.