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SG-500 VPN Security Gateway User’s Manual

- 102 -

4.16 Download

Restrict the Internal Users to access to video, audio, and some specific sub-name

file from http or ftp protocol directly

STEP 1﹒Enter the following settings in Download of Content Blocking function:

 Select All Types Blocking

 Click OK

 Complete the setting of Download Blocking.

Download Blocking Web UI

Содержание

User s manual 1
Vpn security gateway sg 500 1
Ce mark warning 2
Copyright 2
Disclaimer 2
Federal communication commission interference statement 2
Trademarks 2
Fcc caution 3
R tte compliance statement 3
Revision 3
Safety 3
Chapter 1 introduction 1 4
Chapter 2 system 4 4
Chapter 3 interface 38 4
Chapter 4 policy object 50 4
Table of contents 4
Chapter 5 policy 223 5
Chapter 6 web vpn ssl vpn 247 5
Chapter 7 anomaly flow ip 260 5
Chapter 8 monitor 271 5
Chapter 1 introduction 6
Features 6
Package contents 7
Vpn security gateway rear panel 7
Vpn security gateway top view 7
Specification 8
Administration 9
Chapter 2 system 9
System is the managing of settings such as the privileges of packets that pass through the sg 500 and monitoring controls the system administrators can manage monitor and configure sg 500 settings but all configurations are read only for all users other than the system administrator those users are not able to change any setting of the sg 500 9
Admin define the required fields of administrator 10
Adding a new sub administrator 11
Modify the administrator s password 12
Permitted ips 13
Logout 14
Software update 15
Configure 16
The configure is according to the basic setting of the sg 500 in this section the definition is setting date time multiple subnet route table dhcp dynamic dns hosts table and language settings 16
Settings 17
Define the required fields of time settings 18
Define the required fields of multiple subnet 19
Define the required fields of ddns 21
Define the required fields of dhcp 21
Define the required fields of host table 21
System settings exporting 22
System settings importing 23
Enabling e mail alert notification 24
Restoring factory default settings 24
Reboot sg 500 26
Date time 27
Multiple subnet 28
Adding multiple subnet 29
Route table 33
To connect two different subnet router with the sg 500 and makes them to connect to internet through sg 500 33
Dhcp web ui 38
Occasion when the system administrator starts authentication the users first dns server must be the 38
Same as lan interface ip in order to enter authentication web ui 38
When selecting automatically get dns the dns server will lock it as lan interface ip using 38
Host table 41
Language 42
Chapter 3 interface 43
Interface 44
Interface define the required fields of interface 44
Dynamic ip address connection 52
Dmz setting dmz interface address nat mode 53
Setting dmz interface address transparent mode 54
Address 55
Chapter 4 policy object 55
Define the required fields of address 56
Example 58
Example under dhcp situation assign the specific ip to static users and restrict them to access ftp net service only through policy 58
Setup a policy that only allows partial users to connect with specific ip external specific ip 61
Step 1 setting several lan network address 61
Service 65
Define the required fields of service 66
Custom 68
Custom allow external user to communicate with internal user by voip through policy voip port tcp 1720 tcp 15328 15333 udp 15328 15333 68
Setting service group and restrict the specific users only can access to service setting service group and restrict the specific users only can access to service resource that provided by this group through policy group http pop3 smtp dns 72
Complete the setting of adding service group 73
Schedule 75
To configure the valid time periods for lan users to access to internet in a day 76
The flow after using qos max bandwidth 400kbps guaranteed bandwidth 200kbps 79
Define the required fields of qos 80
Example 82
Example setting a policy that can restrict the user s downstream and upstream bandwidth 82
Authentication 84
By configuring the authentication you can control the user s connection authority the user has to pass the authentication to access to internet the sg 500 configures the authentication of lan s user by setting account and password to identify the privilege 84
Define the required fields of authentication 85
Connecting to the appointed website after authentication 87
If the users ask for authentication positively they can enter the lan ip by the authentication port 87
It will connect to the appointed website after passing authentication 87
Number and then the authentication web ui will be displayed 87
Example 90
Example setting specific users to connect with external network only those pass the authentication of policy adopt the built in auth user and auth group function 90
Content blocking 94
Define the required fields of content blocking 95
Url blocking 98
Url restrict the internal users only can access to some specific web site 98
Restrict the internal users to access to script file of website restrict the internal users to access to script file of website 101
Script 101
Restrict the internal users to access to the file on internet by p2p restrict the internal users to access to the file on internet by p2p 103
Restrict the internal users to send message files video and audio by instant restrict the internal users to send message files video and audio by instant messaging 105
Download 107
Download restrict the internal users to access to video audio and some specific sub name file from http or ftp protocol directly 107
Virtual server 109
Define the required fields of virtual server 111
Example 113
Example make a single server that provides several services such as ftp web and mail to provide service by policy 113
A single server that provides several services by mapped ip 115
Step 7 complete the setting of providing several services by mapped ip 115
Make several servers that provide a single service to provide service through policy by virtual server take web service for example 116
Step 1 setting several servers that provide web service in lan network which ip address is 192 68 01 192 68 02 192 68 03 and 192 68 04 116
The external user use voip to connect with voip of lan voip port tcp 1720 tcp 153210 15333 udp 153210 15333 119
Make several servers that provide several same services to provide service through policy by virtual server take http pop3 smtp and dns group for example 123
How to use the vpn 127
Ipsec vpn 127
Example to access the static subnet resources via the ipsec vpn connection between two sg 500 appliances 131
Vpn test environment 131
The default gateway of company a is the sg 500 lan ip 192 68 0 follow the steps 132
The default gateway of company b is the lan ip of the sg 500 192 68 0 follow the steps below 138
Example 144
Test environment 144
The deployment 144
The way to set the sg 500 appliance ipsec vpn connection in windows 2000 144
Following settings 145
The a company s default gateway is the lan ip 192 68 0 in the sg 500 add the 145
The b company s real ip is 211 2 2 2 add the following settings 151
Example 202
Test environment 202
The way to set the ipsec vpn connection between two sg 500 appliances aggressive mode the ipsec algorithm 3des encryption md5 authentication 202
Settings 203
The a company s default gateway is the sg 500 lan ip 192 68 0 make the following 203
Settings 209
The b company s default gateway is the sg 500 s lan ip 192 68 0 add the following 209
Example 215
Test environment 215
The deployment 215
The way to set the ipsec vpn connection between two sg 500 appliances the gre packets the ipsec algorithm 3des encryption md5 authentication 215
The a company s default gateway is the lan ip 192 68 0 in sg 500 216
The b company s default gateway is the lan ip 192 68 0 of sg 500 add the following settings 222
Chapter 5 policy 228
Define the required fields of policy define the required fields of policy 230
Policy 230
Example 234
Example set up the policy that can monitor the internal users take logging statistics and alarm threshold for example 234
231 231 236
Sg 500 vpn security gateway user s manual 236
Statistics web ui 236
Step 4 to display the traffic record that through policy to access to internet in policy statistics of statistics function 236
Forbid the users to access to specific network take specific wan ip and content blocking for example 237
Download blocking setting 238
Only allow the users who pass authentication to access to internet in particular time 242
The external user control the internal pc through remote control software take pc anywhere for example 244
Set a ftp server under dmz nat mode and restrict the download bandwidth from external and max concurrent sessions 246
Set a mail server to allow the internal and external users to receive and send e mail under dmz transparent mode 248
As a result of the internet universal application the demand which the enterprise security about remote login also grows day by day the most convenient security solution to user is nothing better than in ssl vpn the user does not need to install any software or the hardware and just use standard browser to transmit data through ssl safe encryption agreement 252
Chapter 6 web vpn ssl vpn 252
Define the required fields of setting 253
Define the required fields of vpn 253
Define the required fields of status 254
Settings 255
Settings setting web vpn ssl vpn connection between external client and sg 500 255
Chapter 7 anomaly flow ip 265
When the sg 500 received the intrusion packets from hackers the internal pc will block this abnormal packets in it to prevent the company s network be paralyzed in this chapter we will make the introduction and settings of anomaly flow ip 265
Settings 266
To alert and block the external or internal anomalous data packets 270
Can add non detected ip and these ip will not controlled by this function 271
The setting of anomaly flow ip and dos anti attack 271
Send the netbios alert notification to the mis engineer 273
Chapter 8 monitor 276
Traffic log 278
Traffic log to detect the information and protocol port that users use to access to internet or intranet by sg 500 278
Event log 283
Event log to record the detailed management events such as interface and event description of sg 500 of the administrator 283
Connection log 286
Connection log to detect event description of wan connection 286
Log backup 289
Log backup to save or receive the records that sent by the sg 500 289
Accounting report 291
Define the required fields of accounting report 292
Outbound 294
Outbound source ip statistics report 295
Outbound destination ip statistics report 297
Inbound 300
Inbound top users statistics report 301
Inbound destination ip statistics report 303
According to the downstream upstream report of the selected top numbering to draw the protocol distribution chart 305
Statistics 306
Define the required fields of statistics 307
Policy 310
In this section we will make the introduction of wake on lan 312
Software such as vnc terminal service and pc anywhere 312
The mis engineers can use the sg 500 appliance to start up the internal pcs by sending packets 312
Wake on lan 312
Which included the network bootable network adapter and can additionally use the remote monitor 312
Remote monitor the internal pc 313
Status 314
Interface 315
Interface status 316
Authentication 317
Arp table 318
Dhcp clients 319

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