Ericsson W25 Bedienungsanleitung PDF herunterladen (Seite 18)

18 221 02-FGB 101 327 Uen C - December 2006

3.2.5.1 NAT Port Forwarding

The NAT Port Forwarding feature, sometimes referred to as Virtual Server,

redirects traffic from the WAN side to a server on the LAN side.

The Port Forwarding feature requires a public WAN IP address on the W2x

terminals.

3.2.5.2 NAT ALGs

An ALG enables the transfer of specific application streams through firewall

policies and NAT. This is enabled by creating dynamic holes in the firewall

policy and NAT and changing IP addresses in network protocol headers,

and if a secondary port is required, the ALG will open one.

The W2x terminals include NAT ALGs for the following protocols:

• FTP

• TFTP

The included ALGs can be enabled/disabled individually and do not require

any additional configuration.

3.2.6 IP Quality of Service

The QoS service in the W2x terminals support the Stochastic Fair Queuing

(SFQ) scheduling algorithm which makes sure that no single session can

dominate outgoing bandwidth.

The QoS feature applies for upstream traffic only.

3.2.7 UPnP

The W2x terminals support the UPnP standard with respect to the Internet

Gateway Device (IGD) profile, used by Microsoft Messenger (among

others) to configure port forwarding in a NAT router.

3.2.8 VPN Pass-Through

The W2x terminals support IPSec VPN (Virtual Private Network) pass-

through.

3.2.9 PPP Clients

The W2x terminals include a PPP client for WAN access.

For authentication both the PAP (Password Authentication Protocol) and

CHAP (Challenge Handshake authentication Protocol) protocols are

supported.

3.2.10 SIP (W25 only)

The Ericsson W25 supports the SIP protocol (RFC 3261) for T.38 Fax over

IP.

3.3 USB Services

The W2x terminals function as a network storage device for LAN hosts

using SMB/CIFS (as printer and file sharing in Windows).

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Ericsson W25 Bedienungsanleitung Seite 18