agent only responding to the localhost... not to the interfaces...

Hello all,

(two years ago I was an active member of this list because I was
developing an snmp agent for UPSs, and I keep the memory of everybody
helping me out... thanks for that. I also had the oportunity to help
others...)

My problem:

--- I'm running snmpd on a Debian/GNU/Linux router with several network
interfaces for traffic shapping;
--- there is an iptables firewall by I'm doing tests with all default
policies as ACCEPT;
--- I can access httpd and sshd: this would imply that the firewall is
letting things through (at least tcp !!!) (only connect through sshd)
--- I have even configured mrtg: it accesses snmpd locally through the
localhost (127.0.0.1) interface; it works just fine;
--- unfortunatelly the agent does not respond if the requests are
directed to any of the interfaces - even when the requests are executed
locally.

See bellow some shell details and snmpd.conf

thank you
jmf


-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
bottle:~# ifconfig | grep -A 1 eth0
eth0       Encapsulamento do Link: Ethernet  Endereço de HW
00:0E:2E:0D:60:C4
          inet end.: 194.79.75.113  Bcast:194.79.75.127 
Masc:255.255.255.224
bottle:~# snmpget -v2c -c public localhost sysContact.0
SNMPv2-MIB::sysContact.0 = STRING: Pedro Costa: pedroc _ estg | ipvc |
pt
bottle:~# snmpget -v2c -c public 194.79.75.113 sysContact.0
Timeout: No Response from 194.79.75.113.
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
bottle:~# iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination
DROP       all  --  anywhere             anywhere            ipp2p
v0.8.1_rc1 --kazaa --gnu --edk --dc --bit --apple --soul --winmx --ares

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
bottle:~#
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-------- SNMPD.CONF ---------------------------
---- (I have eliminated most of the comment (#) lines, only those!) -

bottle:~# cat /etc/snmp/snmpd.conf

# snmpd.conf
#
#   - created by the snmpconf configuration program
#

syslocation  "Escola Superior de Tecnologia e Gestão"

syscontact  Pedro Costa: pedroc _ estg | ipvc | pt

rocommunity  public

-----------------------------------------------
-----------------------------------------------
-----------------------------------------------
-----------------------------------------------

Thank you all for your help

I really can't figure it out !?!?!

... this machine is our main gateway and we really need to monitor
it....

jmf




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