![background image](http://html.mh-extra.com/html/cisco/5505-asa-firewall-edition-bundle/5505-asa-firewall-edition-bundle_cli-configuration-manual_186241125.webp)
1-19
Cisco ASA Series CLI Configuration Guide
Chapter 1 Configuring Inspection of Basic Internet Protocols
HTTP Inspection
The
send-protocol-error
keyword sends a protocol error message.
The
drop-connection
keyword drops the packet and closes the connection.
The
mask
keyword masks out the matching portion of the packet.
The
reset
keyword drops the packet, closes the connection, and sends a TCP reset to the server
and/or client.
The
log
keyword, which you can use alone or with one of the other keywords, sends a system log
message.
The
rate-limit
message_rate
argument limits the rate of messages.
You can specify multiple
class
or
match
commands in the policy map. For information about the order
of
class
and
match
commands, see the
“Defining Actions in an Inspection Policy Map” section on
.
Step 7
To configure parameters that affect the inspection engine, perform the following steps:
a.
To enter parameters configuration mode, enter the following command:
hostname(config-pmap)#
parameters
hostname(config-pmap-p)#
b.
To check for HTTP protocol violations, enter the following command:
hostname(config-pmap-p)#
protocol-violation
[
action
[
drop-connection
|
reset
|
log
]]
Where the
drop-connection
action closes the connection. The
reset
action closes the connection
and sends a TCP reset to the client. The
log
action sends a system log message when this policy map
matches traffic.
c.
To substitute a string for the server header field, enter the following command:
hostname(config-pmap-p)#
spoof-server
string
Where the
string
argument is the string to substitute for the server header field. Note: WebVPN
streams are not subject to the
spoof-server
comand.
The following example shows how to define an HTTP inspection policy map that will allow and log any
HTTP connection that attempts to access “www\.xyz.com/.*\.asp" or "www\.xyz[0-9][0-9]\.com" with
methods "GET" or "PUT." All other URL/Method combinations will be silently allowed.
hostname(config)#
regex url1 “www\.xyz.com/.*\.asp”
hostname(config)#
regex url2 “www\.xyz[0-9][0-9]\.com”
hostname(config)#
regex get “GET”
hostname(config)#
regex put “PUT”
hostname(config)#
class-map type regex match-any url_to_log
hostname(config-cmap)#
match regex url1
hostname(config-cmap)#
match regex url2
hostname(config-cmap)#
exit
hostname(config)#
class-map type regex match-any methods_to_log
hostname(config-cmap)#
match regex get
hostname(config-cmap)#
match regex put
hostname(config-cmap)#
exit
hostname(config)#
class-map type inspect http http_url_policy
hostname(config-cmap)#
match request uri regex class url_to_log
hostname(config-cmap)#
match request method regex class methods_to_log
hostname(config-cmap)#
exit
Summary of Contents for 5505 - ASA Firewall Edition Bundle
Page 28: ...Glossary GL 24 Cisco ASA Series CLI Configuration Guide ...
Page 61: ...P A R T 1 Getting Started with the ASA ...
Page 62: ......
Page 219: ...P A R T 2 Configuring High Availability and Scalability ...
Page 220: ......
Page 403: ...P A R T 2 Configuring Interfaces ...
Page 404: ......
Page 499: ...P A R T 2 Configuring Basic Settings ...
Page 500: ......
Page 533: ...P A R T 2 Configuring Objects and Access Lists ...
Page 534: ......
Page 601: ...P A R T 2 Configuring IP Routing ...
Page 602: ......
Page 745: ...P A R T 2 Configuring Network Address Translation ...
Page 746: ......
Page 845: ...P A R T 2 Configuring AAA Servers and the Local Database ...
Page 846: ......
Page 981: ...P A R T 2 Configuring Access Control ...
Page 982: ......
Page 1061: ...P A R T 2 Configuring Service Policies Using the Modular Policy Framework ...
Page 1062: ......
Page 1093: ...P A R T 2 Configuring Application Inspection ...
Page 1094: ......
Page 1191: ...P A R T 2 Configuring Unified Communications ...
Page 1192: ......
Page 1333: ...P A R T 2 Configuring Connection Settings and QoS ...
Page 1334: ......
Page 1379: ...P A R T 2 Configuring Advanced Network Protection ...
Page 1380: ......
Page 1475: ...P A R T 2 Configuring Modules ...
Page 1476: ......
Page 1549: ...P A R T 2 Configuring VPN ...
Page 1550: ......
Page 1965: ...P A R T 2 Configuring Logging SNMP and Smart Call Home ...
Page 1966: ......
Page 2059: ...P A R T 2 System Administration ...
Page 2060: ......
Page 2098: ...1 8 Cisco ASA Series CLI Configuration Guide Chapter 1 Troubleshooting Viewing the Coredump ...
Page 2099: ...P A R T 2 Reference ...
Page 2100: ......