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Security > firewall, Security > vpn passthrough, Security > firewall security > vpn passthrough – Cisco WRT310N User Manual

Page 19: Advanced configuration, Firewall, Internet filter, Web filter

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Chapter 3

Advanced Configuration

18

Wireless-N Gigabit Router

hear the beacons and awaken to receive the broadcast

and multicast messages. The default value is 1.

Fragmentation Threshold

This value specifies the

maximum size for a packet before data is fragmented

into multiple packets. If you experience a high packet

error rate, you may slightly increase the Fragmentation

Threshold. Setting the Fragmentation Threshold too low

may result in poor network performance. Only minor

reduction of the default value is recommended. In most

cases, it should remain at its default value of 2346.

RTS Threshold

Should you encounter inconsistent data

flow, only minor reduction of the default value, 2347, is

recommended. If a network packet is smaller than the

preset RTS threshold size, the RTS/CTS mechanism will

not be enabled. The Router sends Request to Send (RTS)

frames to a particular receiving station and negotiates

the sending of a data frame. After receiving an RTS, the

wireless station responds with a Clear to Send (CTS) frame

to acknowledge the right to begin transmission. The RTS

Threshold value should remain at its default value of

2347.
Click Save Settings to apply your changes, or click Cancel

Changes to cancel your changes.

Security > Firewall

The Firewall screen is used to configure a firewall that can

filter out various types of unwanted traffic on the Router’s

local network.

Security > Firewall

Firewall

SPI Firewall Protection

To use firewall protection,

keep the default selection, Enabled. To turn off firewall

protection, select Disabled.

Internet Filter

Filter Anonymous Internet Requests

This feature

makes it more difficult for outside users to work their

way into your network. This feature is selected by default.

Deselect the feature to allow anonymous Internet

requests.

Filter Multicast

Multicasting allows for multiple

transmissions to specific recipients at the same time. If

multicasting is permitted, then the Router will allow IP

multicast packets to be forwarded to the appropriate

computers. Select this feature to filter multicasting. This

feature is not selected by default.

Filter Internet NAT Redirection

This feature uses port

forwarding to block access to local servers from local

networked computers. Select this feature to filter Internet

NAT redirection. It is not selected by default.

Filter IDENT (Port 113)

This feature keeps port 113 from

being scanned by devices outside of your local network.

This feature is selected by default. Deselect this feature to

disable it.

Web Filter

Proxy

Use of WAN proxy servers may compromise the

Gateway’s security. Denying Proxy will disable access to

any WAN proxy servers. Select this feature to enable proxy

filtering. Deselect the feature to allow proxy access.

Java

Java is a programming language for websites. If you

deny Java, you run the risk of not having access to Internet

sites created using this programming language. Select

this feature to enable Java filtering. Deselect the feature

to allow Java usage.

ActiveX

ActiveX is a programming language for websites.

If you deny ActiveX, you run the risk of not having access to

Internet sites created using this programming language.

Select this feature to enable ActiveX filtering. Deselect the

feature to allow ActiveX usage.

Cookies

A cookie is data stored on your computer and

used by Internet sites when you interact with them. Select

this feature to filter cookies. Deselect the feature to allow

cookie usage.
Click Save Settings to apply your changes, or click Cancel

Changes to cancel your changes.

Security > VPN Passthrough

The VPN Passthrough screen allows you to enable VPN

tunnels using IPSec, PPTP, or L2TP protocols to pass through

the Router’s firewall.