Intel 9515, 9525, 9535 manual Src. port Action Pass Protocol

Page 21

DMZ Firewall Solution for the Express Router

Filter Function

2Allows FTP (only passive connections) from secure LAN to the FTP proxy server on the DMZ (see note 1).

Two filters are required.

3

4Allows incoming mail (SMTP) from DMZ to the secure LAN.

5Allows outgoing mail (SMTP) from secure LAN to the DMZ.

6Allows incoming News (NNTP) from the DMZ to the secure LAN (see note 2).

7Allows outgoing News (NNTP) to DMZ from secure LAN.

Settings

Src. port:

= 80

Action:

Pass

Protocol:

TCP

TCP flags:

ACK

Dest. address type:

All

Dest port:

>1023

Src. address type:

Host

Src. address:

193.84.251.2

Src. port:

= 21

Action:

Pass

Protocol:

TCP

TCP flags:

ACK

Dest. address type:

All

Dest. port:

> 1023

Src. address type:

Host

Src. address:

193.84.251.2

Src. port:

> 1023

Action:

Pass

Protocol:

TCP

TCP flags:

All

Dest. address type:

Host

Dest. address:

10.1.0.1

Dest. port:

25

Src. address type:

Host

Src. address:

193.84.251.3

Src. port:

> 1023

Action:

Pass

Protocol:

TCP

TCP flags:

ACK

Dest. address type:

Host

Dest. address:

10.1.0.1

Dest. port:

> 1023

Src. address type:

Host

Src. address:

193.84.251.3

Src. port:

25

Action:

Pass

Protocol:

TCP

TCP flags:

All

Dest. address type:

Host

Dest. address:

10.1.0.2

Dest. port:

119

Src. address type:

Host

Src. address:

193.84.251.4

Src. port:

> 1023

Action:

Pass

Protocol:

TCP

TCP flags:

ACK

Dest. address type:

Host

Dest. address:

10.1.0.2

07-12-99

Version 1.0

20

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Contents DMZ Firewall Solution Copyright 1999, Intel Corporation. All rights reserved Table of Contents Introduction What is a DMZAbout This Document ReferencesGeneral Setup and Considerations IP Filters in the Express RouterIP Address Selection DNS Setup Routing SetupMail Smtp Setup FTP SetupDMZ Single IP Address Solution Static Routing SetupNetwork Address Translation NAT Setup Settings IP Filters SetupEntry Function Receive Rx Filters on LAN1Transmit Tx Filters on LAN1 Filter FunctionSrc. address 10.2.0.2 Src. port Action Pass Protocol Receive Rx Filters on LAN2 2 LAN2 FiltersRIP Filter Function SettingsTransmit Tx filters on LAN2 Settings Receive Rx Filters on the connection to the Internet Internet Connection FiltersAction Pass Protocol UDP Transmit Tx Filters on the Connection to the Internet IP Address Assignment DMZ Multiple IP Address SolutionNetwork Address Translation NAT Transmit Tx Filters on LAN1 Settings Src. port Action Pass Protocol Dest. address type All Dest port Src. address type All Src. port Action Discard Protocol Action Discard Protocol Transmit Tx filters on LAN2 Src. port 1023 Action Pass Protocol UDP Transmit Tx Filters on the Connection to the Internet
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