Sophos WS100 User Manual

Virtual Appliances on page 22
Related tasks
Backup on page 120
2.3.9 Network Deployment Troubleshooting
The following is a list of known Web Appliance network deployment issues and their solutions.
"Blocked" Notification Page Lacks Graphics and a Stylesheet
Problem: If the "Blocked" notification page is displayed without any graphics and as raw HTML
without the formatting of a stylesheet, the problem can result from the following combination of
conditions in your network deployment:
■
Your browser is configured to bypass use of the Web Appliance for your internal sites (for
example, the domain name of your Web Appliance would normally be bypassed).
■
Your browser is configured with the Web Appliance’s IP address instead of its fully qualified
hostname.
■
Your DNS server cannot resolve the Web Appliance’s IP address.
Solution: The best solution is to add the Web Appliance to your DNS server.
Firewall reports attachments stripped from Web
Appliance-generated email
Background:The Web Appliance provides a managed appliance experience that is enabled in
part by sending system status snapshots as email attachments to Sophos to ensure that your
Web Appliance is operating within acceptable thresholds.
Problem: Firewalls can strip attachments from Web Appliance-generated email.
Solution: To enable the Sophos managed appliance experience, configure your firewall to allow
email with attachments from the Web Appliance to wsasupport@sophos.com.
Long delays when loading web pages
Problem: If latency is significantly increased when browsing through the appliance, the problem
may be due to an inappropriate Speed and duplex setting forced by enabling the auto-detect
option.
Solution:To test if this is the case, set one of the manual options in the Speed and duplex option
on the Configuration > Network > Network Interface page. If this change does not remedy the
high latency problem, reinstate the automatic option and contact Sophos Technical Support .
RealPlayer Content Appears to be Blocked
Problem: RealPlayer content fails to play.This is typically a firewall configuration issue and not
an Web Appliance problem. RealPlayer uses port 554, which is typically blocked in default firewall
configurations.
Note: The remote site can force the use of a non-HTTP port, which will result in users not being
able to view the content if the firewall is blocking the port being used.
Solution: To enable access to RealPlayer content, open port 554 on your firewall.
42 | Getting Started | Sophos Web Appliance

Sophos WS100 Specifications

General

Brand	Sophos
Model	WS100
Category	Firewall
Language	English