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Limitations

Limitations associated with the IPS Signature Converter plugin.
The following are limitations associated with the IPS Signature Converter plugin.
Issue ID
Description
CON-47912
You can upload only 100 rules at a time for conversion. If you attempt to upload more than 100 rules, the plugin will convert only the first 100 rules and then will display a warning.
CON-47912
The converter supports only rules with headers that contain one of five protocols:
  • tcp
  • udp
  • icmp
  • smb
  • http
PAN-159486
The converter always treats certain fields as either case-sensitive or case-insensitive, even if the original custom signature specifies case-sensitivity using nocase or \i. The following fields are always case-sensitive:
  • http-rsp-reason
  • http-rsp-headers
  • http-rsp-code
  • http-req-mime-form-data
  • file-data
The following are always case-insensitive:
  • http-req-uri
  • http-req-headers
  • http-req-host-header
  • http-req-user-agent-header
  • tcp-context-free
  • udp-context-free
PLUG-6375
Snort rules that use the soid keyword are not supported.
PLUG-6183
Snort rules for enabling or disabling decoder and preprocessor events are not supported.
PLUG-6155
Converted Snort/Suricata rules with large values for the within keyword can result in long commit times on PA-220 and PA-850 platforms. As a result, the maximum supported value of within is 100. The converter will reduce any value greater than that to 100.
PLUG-5405
A rule fails conversion when it includes a pcre pattern that would convert to use the tcp-context-free, udp-context-free, or file-data custom signature context.