Intel 1520 用户手册

Appendix A Caching Solutions and Performance

Bypass rules can be either static or adaptive. Adaptive bypass rules are 
dynamically generated if you configure the appliance to bypass in the case of 
non-HTTP port 80 traffic or HTTP errors.

Static and dynamic rules look exactly the same. However, the appliance creates 
dynamic rules when it encounters particular problems, such as non-HTTP port 80 
traffic or HTTP errors. 

You can bypass requests based on the following criteria:

✔ Requests from particular users (identified by source IP addresses); set static 

source bypass rules from the command-line interface

✔ Requests to particular Web sites (identified by destination IP addresses); set 

static destination bypass rules from the command-line interface

✔ Requests from specific sources to specific destinations; set static 

source/destination bypass rules from the command-line interface

Bypass rules fall into these categories:

This rule tells the appliance to bypass a particular source IP address or range 
of IP addresses. For example, you can use this rule to bypass clients that want 
to opt out of a caching solution. Source bypass rules are not dynamically 
generated. 

This rule tells the appliance to bypass a particular destination IP address or 
range of IP addresses. For example, these could be Web servers that use IP 
authentication based on the client’s real IP address. Destination bypass rules 
can be dynamically generated.

Destination bypass rules prevent the appliance from caching an entire site. 
You will experience hit rate impacts if the site you bypass is popular. 

This rule tells the appliance to bypass requests that originate from the 
specified source to the specified destination. For example, you can route 
around specific client-server pairs that experience broken IP authentication or 
out-of-band HTTP traffic problems when cached. 
Source/destination rules can be dynamically generated.

Source/destination bypass rules might be preferable to destination rules 
because they block a destination server only for those particular users that 
experience problems.