Cisco EA2700 User Manual - Page 44

How to improve security using the built-in firewall - update

Get Cisco EA2700 PDF manuals and user guides View all Cisco EA2700 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 44 highlights

Linksys EA-Series 7. Click Save Settings at the bottom of the page. 8. Click Wireless Client List again to check the updated device list. Only the device you selected remains on the network. How to improve security using the built-in firewall Why would I need to change my security settings? By default, the firewall settings in your router have been optimized for most home environments, so no changes are needed. The SPI (Stateful Packet Inspection) firewall is enabled by default. In addition, anonymous Internet requests and IDENT requests are filtered by default. All web filters are disabled, because enabling them may cause problems for sites that depend on ActiveX controls, Java, or cookies. General firewall settings To change your firewall settings: Security > Firewall 1. Log into the browser-based utility (see "How to open the browser-based utility" on page 20). 2. Click the Security tab, then click the Firewall page. Improving Security 3. Select each setting that you want to change. Tip For descriptions of the filters, click Help on the right side of the screen. More complete descriptions are included below. •• SPI Firewall Protection-This helps protect your local network from Internet threats. This option is enabled by default. On some router models, this setting is separated into IPv6 and IPv4 options so that each can be handled separately. Caution To help protect your network, you should keep this option enabled. •• Filter Anonymous Internet Requests-This filter blocks Internet requests from unknown sources such as ping requests. This option is enabled by default. •• Filter Multicast-Multicasting allows a single transmission to simultaneously reach specific recipients within your local network. Select this option to block multicasting. This option is disabled by default. •• Filter Internet NAT Redirection for IPv4 Internet Only-This filter prevents a local computer from using a URL or Internet IP address to access the local server. Select this option to enable the filter. This option is disabled by default. On some router models, this setting applies to IPv4 Internet only. •• Filter IDENT (Port 113)-This filter prevents port 113 from being scanned by devices from the Internet. This option is enabled by default. 4. Click Save Settings to update your changes. 41

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
41
Improving Security
Linksys EA-Series
7.
Click
Save Settings
at the bottom of the page.
8.
Click
Wireless Client List
again to check the updated device list. Only
the device you selected remains on the network.
How to improve security using the built-in firewall
Why would I need to change my security settings?
By default, the firewall
settings in your router have been optimized for most home environments, so
no changes are needed. The
SPI
(Stateful Packet Inspection) firewall is enabled
by default. In addition, anonymous Internet requests and IDENT requests are
filtered by default. All web filters are disabled, because enabling them may
cause problems for sites that depend on ActiveX controls, Java, or cookies.
General firewall settings
To change your firewall settings:
Security > Firewall
1.
Log into the browser-based utility (see “How to open the browser-based
utility” on page 20).
2.
Click the
Security
tab, then click the
Firewall
page.
3.
Select each setting that you want to change.
TIP
For descriptions of the filters, click
Help
on the right side of the
screen. More complete descriptions are included below.
•
SPI Firewall Protection
—This helps protect your local network from
Internet threats. This option is enabled by default. On some router
models, this setting is separated into IPv6 and IPv4 options so that
each can be handled separately.
CAUTION
To help protect your network, you should keep this option enabled.
•
Filter Anonymous Internet Requests
—This filter blocks Internet
requests from unknown sources such as ping requests. This option is
enabled by default.
•
Filter Multicast
—Multicasting allows a single transmission to
simultaneously reach specific recipients within your local network.
Select this option to block multicasting. This option is disabled by
default.
•
Filter Internet NAT Redirection for IPv4 Internet Only
—This filter
prevents a local computer from using a URL or Internet IP address
to access the local server. Select this option to enable the filter. This
option is disabled by default. On some router models, this setting
applies to IPv4 Internet only.
•
Filter IDENT (Port 113)
—This filter prevents port 113 from being
scanned by devices from the Internet. This option is enabled by
default.
4.
Click
Save Settings
to update your changes.