Re: Unable to access snmpd from anywhere but localhost

Hi,

Does querying alpha (10.0.0.224 ) from remote device using SNMPv2c
community works ?


On Tue, Jan 10, 2017 at 6:14 PM, Ed Greenberg <[email protected]> wrote:

> This is on Centos 7 with
>
> Installed Packages
> net-snmp.x86_64 1:5.7.2-24.el7_2.1                     @base
>
> I have this package on two servers on the same subnet.
>
> On 10.0.0.224 (let's call it 'alpha', because that's it's hostname) I run:
>
> [root@alpha ~]# net-snmp-create-v3-user
> Enter a SNMPv3 user name to create:
> nagios
> Enter authentication pass-phrase:
> foobarski
> Enter encryption pass-phrase:
>    [press return to reuse the authentication pass-phrase]
>
> adding the following line to /var/lib/net-snmp/snmpd.conf:
>     createUser nagios MD5 "foobarski" DES
> adding the following line to /etc/snmp/snmpd.conf:
>     rwuser nagios
> [root@alpha ~]#
>
> Then I start snmpd with
>
> [root@alpha ~]# snmpd -LEd -f -d -a
> NET-SNMP version 5.7.2
>
> This should log to standard error, anything debug or better, without
> detaching.
>
>  From 10.0.0.244 I run
>
> snmpget -v3 -u nagios -a MD5 -A foobarski -l authPriv -x DES -X
> foobarski  10.0.0.224 system.sysUpTime.0
>
> Over in another window on Alpha I am running tcpdump and I see the
> packets coming in.
> 07:36:49.913605 IP 10.0.0.244.38890 > alpha.snmp:  F=r U= E= C=
> GetRequest(14)
> 07:36:50.914888 IP 10.0.0.244.38890 > alpha.snmp:  F=r U= E= C=
> GetRequest(14)
> 07:36:51.916270 IP 10.0.0.244.38890 > alpha.snmp:  F=r U= E= C=
> GetRequest(14)
> 07:36:52.917526 IP 10.0.0.244.38890 > alpha.snmp:  F=r U= E= C=
> GetRequest(14)
> 07:36:53.918674 IP 10.0.0.244.38890 > alpha.snmp:  F=r U= E= C=
> GetRequest(14)
> 07:36:54.919985 IP 10.0.0.244.38890 > alpha.snmp:  F=r U= E= C=
> GetRequest(14)
> ^C
>
> snmpd stands mute. It does not log to stderror, beyond logging it's
> signon, and it does not respond to the packets.
>
> The config files were exactly as delivered, but for what
> net-snmp-create-v3-user added.
>
> Later, I added agentAddress udp:161 with no change.
>
> I'm stumped.
>
> In my last job I had over 100 servers that had been set up according to
> this process. They were, however, all centos 6 running 1:5.5-57.el6_8.1
>
> Did something change?
>
> Many thanks,
>
>
> Ed Greenberg
>
>
>
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