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[nv-l] Authentication Trap Failures from Localhost

To: "Nv-L (nv-l@lists.us.ibm.com)" <nv-l@lists.us.ibm.com>
Subject: [nv-l] Authentication Trap Failures from Localhost
From: "Bursik, Scott {PBSG}" <Scott.Bursik@pbsg.com>
Date: Tue, 9 Dec 2003 14:57:43 -0600
Delivery-date: Tue, 09 Dec 2003 21:14:16 +0000
Envelope-to: nv-l-archive@lists.skills-1st.co.uk
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NetView 7.1.3 AIX 4.3.3

I am working on some AIX 5.2 nodes trying to get a "golden" SNMP
configuration. I have performed some tests and I have one thing holding me
back. I am getting a LOT of Authentication Failure traps coming into my
NetView server from these "test" AIX machines. I set up packet sniffing on
one of the machines for the SNMP protocols and I see that there are attempts
to "talk" to the SNMP agent using the "public" community name from the lo0
localhost interface. Our community name for readOnly is not "public". I have
looked at the snmpd.log and it looks like before these Authentication
Failure traps are sent there is some SMUX activity. Is there a configuration
for SMUX where the community name needs to be set?


Here is a sample of the packet where the "public" community name is used:



====( 71 bytes transmitted on interface lo0 )==== 14:37:03.919638085
OTHER packet   (IP)
IP header breakdown:
        < SRC =   156.81.227.74 >  (pbsxst00001.fritolay.pvt)
        < DST =   156.81.227.74 >  (pbsxst00001.fritolay.pvt)
        ip_v=4, ip_hl=20, ip_tos=0, ip_len=71, ip_id=6432, ip_off=0
        ip_ttl=30, ip_sum=0, ip_p = 17 (UDP)
UDP header breakdown:
        <source port=32896, <destination port=161(snmp) >
        [ udp length = 51 | udp checksum = 4adf ]
00000000     30290201 00040670 75626c69 63a01c02     |0).....public...|
00000010     01010201 00020100 3011300f 060b2b06     |........0.0...+.|
00000020     01040102 02010101 000500                |...........     |


Thanks again,

Scott Bursik







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