When snmpd is configured to send traps, it is supposed to use the clientaddr
from snmp.conf..
clientaddr [<transport-specifier>:]<transport-address>
specifies the source address to be used by command-line applica‐
tions when sending SNMP requests. See snmpcmd(1) for more infor‐
mation about the format of addresses.
This value is also used by snmpd when generating notifications.
It does work for snmptrap from command line but not from snmpd (the value is
ignored).
I believe the problem is caused because of:
agent_trap.c:create_trap_session2 uses
/*
* if the sink is localhost, bind to localhost, to reduce open ports.
*/
if ((NULL == netsnmp_ds_get_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_CLIENT_ADDR)) &&
((0 == strcmp("localhost",sink)) || (0 == strcmp("127.0.0.1",sink))))
session.localname = strdup("localhost");
t = netsnmp_tdomain_transport_full("snmptrap", sink, 0, NULL, sinkport);
rather than:
netsnmp_transport_open_client("snmptrap", session.peername)
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