1. ENUM User Guide
  2. ENUM Queries Handling
  3. ENUM Query Screening

3.1 ENUM Query Screening

The ENUM application allows ENUM Query messages to be received from only trusted ENUM clients. The ENUMACL table is used to provision the IP addresses of trusted ENUM clients. A Query message is discarded if the Query message is received from a client other than a trusted ENUM client stored in the ENUMACL table. The ENUMACL table has a maximum capacity of 100 IPADDR entries. For further information, refer to ENUM ACLs section.

Table 3-1 ENUMACL Table

Field Name Constraints Comments

IPADDR
  • Four numbers in the range 0-255 separated by dots
  • Mandatory

The ENUM client IP address is allowed to query the ENUM server.

Wild Cards (*) in IP Addresses

An ACL IPADDR entry of *.*.*.* is invalid. ACL entries which overlap with other entries with wild cards are not allowed. DSR allows the use of wild cards to support IP address ranges covered by an ACL entry as follows:

  • xxx.xxx.xxx.*
  • xxx.xxx.*.*
  • xxx.*.*.*

Table 3-2 ENUMACL Table Example Entries

IPADDR
10.250.80.41
10.250.60.*
10.252.*.*