On Mon, Apr 21, 2025 at 4:09 PM Ari Rabinowitz wrote:
>
> Hi,
>
> I'm trying to set up SNMP monitoring of many of our devices. Since most of
> them support SNMPv3 I've set up the following in my /etc/snmp/snmp.conf:
> defVersion 3
> defSecurityLevel authPriv
> defAuthType SHA
> defPrivType AES
> defAuthPassphrase REDACTED
> defPrivPassphrase REDACTED
> defSecurityName USER
>
> I'm able to override the Version 3 parameters such as defSecurityLevel,
> defAuthType and the passphrases for the devices which support SNMPv3 in host
> specific configuration files in /etc/snmp/hosts/, but I can't find any way to
> specify in a host-specific configuration that the host uses version 2c or
> version 1. Is there any way to do that, if the general default is version 3?
There's supposed to be a way - man snmp.conf says
For example, if you wanted a particular host to use SNMPv2c by default
you could create a ˜/.snmp/hosts/NAME.conf file and in it put:
defVersion 2c
but it doesn't work for me
$ cat ~/.snmp/librarysw.conf
defVersion 2c
$ head -1 ~/.snmp/snmp.conf
defVersion 3
$ snmpwalk librarysw system
snmpwalk: Unknown user name (Sub-id not found: (top) -> system)
$ snmpwalk -v 2c librarysw system
RFC1213-MIB::sysDescr.0 = STRING: "JetStream 24-Port Gigabit L2+
Managed Switch with 4 SFP Slots"
RFC1213-MIB::sysObjectID.0 = OID: TPLINK-MIB::tplinkProducts.122
RFC1213-MIB::sysUpTime.0 = Timeticks: (1501667371) 173 days, 19:17:53.71
RFC1213-MIB::sysContact.0 = STRING: "www.tp-link.com"
RFC1213-MIB::sysName.0 = STRING: "librarysw"
RFC1213-MIB::sysLocation.0 = STRING: "Hong Kong"
RFC1213-MIB::sysServices.0 = INTEGER: 3
hrmmm.. the man page says ˜/.snmp/hosts/NAME.conf so let's move the
librarysw.conf file to .snmp/hosts/ and try again
$ cat ~/.snmp/hosts/librarysw.conf
defVersion 2c
$ snmpwalk librarysw system
snmpwalk: Unknown user name (Sub-id not found: (top) -> system)
still no :(
Regards
Lee
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