updated

1 files changed, 9 insertions, 0 deletions

diff --git a/examples/v3arch/manager/ntfrcv/v2c-with-regexp-community-name.py b/examples/v3arch/manager/ntfrcv/v2c-with-regexp-community-name.py
index abfb991..61507a4 100644
--- a/examples/v3arch/manager/ntfrcv/v2c-with-regexp-community-name.py
+++ b/examples/v3arch/manager/ntfrcv/v2c-with-regexp-community-name.py
@@ -14,6 +14,15 @@
 # $ snmptrap -v1 -c rollover 127.0.0.1 1.3.6.1.4.1.20408.4.1.1.2 127.0.0.1 1 1 123 1.3.6.1.2.1.1.1.0 s test
 # $ snmpinform -v2c -c glove 127.0.0.1 123 1.3.6.1.6.3.1.1.5.1
 #
+# The Notification Receiver below taps on v1/v2c SNMP security module
+# to deliver certains values, normally internal to SNMP Engine, up to
+# the context of user application.
+#
+# This script examines the value of CommunityName, as it came from peer SNMP
+# Engine, and may modify it to match the only locally configured CommunityName
+# 'public'. This effectively makes NotificationReceiver accepting messages with
+# CommunityName's, not explicitly configured to local SNMP Engine.
+#
 from pysnmp.entity import engine, config
 from pysnmp.carrier.asynsock.dgram import udp
 from pysnmp.entity.rfc3413 import ntfrcv