Hello, all.
I've developed a couple of SNMP subagents over the last few months using
net-snmp with good results. I've bumped into an issue involving rwcommunity
that I don't quite understand and am hoping that somebody can give me an "AHA!"
insight.
I'm using version 5.3.1 and only supporting V1 and V2c. I have two copies of
snmpd running on a single system, each listening on different interfaces. One
of these is the "master" and has its snmpd.conf file in a non-standard
directory (I've defined the location using SNMPCONFPATH).
The issue here is that this snmpd master process appears to be ignoring the
rwcommunity definition in its snmpd.conf file. I can specify any community on
an snmpwalk and have it "succeed" when accessing this system.
The only hint I have as to what might be going on is something I noticed when
turning on full debugging using -DALL.
The rwcommunity token is accessed twice by the snmpd master process; it
recognizes it the first time, but not the second time ("unknown token"). This
is true whether or not I prefix rwcommunity with [snmpd]. Also, I tried
specifying the community via --rwcommunity="prince" and had the same results.
Here are some snippets from the debug log file:
read_config: config path used for
snmpd:/etc/snmp/master:/usr/share/snmp:/usr/lib/snmp:/root/.snmp (persistent
path:/var/net-snmp)
read_config:
Reading configuration /etc/snmp/master/snmpd.conf
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:70 examining: master agentx
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:75 examining: agentuser root
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:86 examining: agentxsocket localhost:722
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:87 examining: smuxsocket 1.0.0.0
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:126 examining: rwcommunity prince
.
.
.
trace:
netsnmp_ds_set_string(): default_store.c, 283:
netsnmp_ds_set_string:
Setting APP:5 = "1.0.0.0"
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:126 examining: rwcommunity prince
/etc/snmp/master/snmpd.conf:
line 126: Warning: Unknown token: rwcommunity.
Here are similar snippets using [snmpd] and using --rwcommunity:
trace:
read_config(): read_config.c, 756:
read_config:
Switching to new context: (this line only) snmpd
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:126 examining: [snmpd] rwcommunity prince
.
.
trace:
read_config(): read_config.c, 779:
read_config:
/etc/snmp/master/snmpd.conf:126 examining: [snmpd] rwcommunity prince
/etc/snmp/master/snmpd.conf:
line 126: Warning: Unknown token: rwcommunity.
**
trace:
netsnmp_config_process_memory_list(): read_config.c, 631:
read_config:
processing memory: rwcommunity prince
.
.
.
trace:
netsnmp_config_process_memory_list(): read_config.c, 631:
read_config:
processing memory: rwcommunity prince
: line 0:
Warning: Unknown token: rwcommunity.
Is there anything obvious here that I'm missing?
Thanks,
Paul
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