In the firewall configuration command line interface, it will tip can't delete when we input undo acl XXXX, XXXX in the system mode.
As shown in figure:
1 Enter the inter-domain model, cancel the application of ACL in the inter-domain, input command:
[USG2200]firewall interzone zone1 zone2（Zone1 and zone2 are two area names.）
[UGS2200-interzone-zone1-zone2]undo packet－filter acl xxxx inbound/outbound
2 enter the system model, delete the acl XXXX, input command:
[USG2200] undo acl XXXX
Note that in the delete acl configuration save and business security, completes the strategy adjustment.
This ACL has been used in inter-domain.
Save the configuration before delete.