SNMP

[Nobody's Hero]

I am trying to send very simple snmpd commands from 'a' to 'b'. 'b' is on the other side of the firewall, however, our network group told me they opened port 161 for snmp. Still no response. Is there a command I can use to test port 161 on system 'b'?

[harry d brown jr]

yes, -->

telnet b 161

live free or die
harry

[Sajid_1]

hello,

you can use 'lsof' on the remote system and see if the port is configured to accept requests.

hth

[Jeff Schussele]

Hi Robert,

Did the FW group open port 161 UDP?
SNMP uses UDP & not TCP, so have them doublecheck.
They'll also have to open 162/UDP for the traps.

HTH,
Jeff

[Nobody's Hero]

Harry,
I tried 'telnet b 161' on this 10.20 box and it returned 'b: Unknown Host'. Am I not understanding your command?

[Nobody's Hero]

I also noticed that the following sub agents are not running. When I try to start them, I get no error that I can see and it does not start.

/usr/sbin/hp_unixagt
/usr/sbin/mib2agt

the snmpd daemon is running though.

[Jeff Schussele]

Hi Robert,

Harry meant
telnet hostname_of_b 161
i.e. telnet to the host on port 161.

Rgds,
Jeff

[Jeff Schussele]

But on reflection telnet is a TCP function.
If it connects OK that's eveidence that the FW group opened 161/TCP & you need 161/UDP and 162/UDP.

Rgds,
Jeff

[Nobody's Hero]

Sorry harry, not enough coffee yet. I understand. My bag.

[Sajid_1]

hello,

This will give you the explanation:
# man telnet

If you are not giving any telnet ports, it will try connecting to the default one. You can also check the /etc/services file and see if the port is defined there and which service is running.

[Nobody's Hero]

Tried,
'telnet ihshp2 161'
Returns:

'telnet ihshp2 161
Trying...
telnet: Unable to connect to remote host: Connection refused'

[MANOJ SRIVASTAVA]

Hi Robert


Can you do nslookup ihshp2 and see how the name is resolved , also you may try the nslookup IP adress , onc ethis get throght then you may be able to login or accces it using the port no.



Manoj Srivastava

[Sajid_1]

This will be helpful:
http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000048605640

Doc ID - A5858520

[harry d brown jr · Accepted solution]

Robert,

Yea, sorry about that, telnet isn't going to work here. try loading this:

http://hpux.cs.utah.edu/hppd/hpux/Networking/Admin/tricklet-1.4/

then test it with this on HOSTA:

echo "sysDescr" | /opt/tricklet/bin/snmp-get HOSTNAMEB

live free or die
harry

[Nobody's Hero]

Bingo, thanks Harry. Peerrrffeecctt.
Exactly what I was looking for. Could you srdf your knowledge. I need an upgrade.