by the way I have to configure this SNMP stuff on a firewall that is part of a SNMP project
so they want to allow only some hosts to send SNMP packets a across this Linux firewall
Since I still don't get how to do it on SNMP like in Windows
I was thinking using hosts.allow and deny like this
but I read this
# Never configure TCP Wrappers on firewall host.
# Put TCP Wrappers behind a firewall systems as TCP Wrappers is no substitute for netfilter or pf firewall.
I am working on a project, which has the following type of hardware setup.
A special hardware device is receiving data from an external network interface. So we can have multiple such a hardware devices. Now these hardware devices will route the captured incoming data through the external... (4 Replies)
there are a number of clients connected to a server.... how can i count that each clients recieve ...? how do i moniter the activity of the client..? (2 Replies)
Hi,
I want to capture snmp packets in AIX.
When i give print from AIX6.1, Printer will give its response thru' snmp.
I used iptrace command like below, but it is not capturing snmp packets other packets are captured like udp, tcp..
1. iptrace command:
/usr/sbin/iptrace -a -i en0... (1 Reply)
Hi ,
Currently DELL OMSA SNMP sends data through default udp port 161.I want my custom SNMP MIB also to send data in the same udp port 161.Whether its possible.If yes where to configure .I tried starting my custom MIB in udp port 161,but it throws port already in use.Kindly guide. (0 Replies)
Hi ,
Currently DELL OMSA SNMP sends data through default udp port 161.I want my custom SNMP MIB also to send data in the same udp port 161.Whether its possible.If yes where to configure .I tried starting my custom MIB in udp port 161,but it throws port already in use.Kindly guide. (1 Reply)
I am having a problem with an SNMP event, and I am not sure where I should be looking to solve this problem.
Description:
There is an SNMP event in our system that for one reason or another is not getting sent out as an email because it is never getting to our SNMP agent.
I see where the... (0 Replies)
Dear Champs,
I am new to unix, and need to configure linux server to send below traps to a SNMP server.
Monitoring TRAP Disk Space Low
Monitoring TRAP Memory Low
Monitoring TRAP CPU high
Monitoring TRAP Admin login/Logoff
Please help me how to send this information to my SNMP server... (2 Replies)
i am working with embedded system -Dell DCS management sub system. my question is as below:
currently we are using linux kernel 2.6.30 build and we have a kernel logs stored to the /var/log/messages path. now we have to transfer all this logs to the specified SNMP target as a part of SNMP... (4 Replies)
Discussion started by: vipul_prajapati
4 Replies
LEARN ABOUT ULTRIX
snmpd
snmpd(8n)snmpd(8n)Name
snmpd - Simple Network Management Protocol (SNMP) Agent for ULTRIX gateways and hosts
Syntax
/etc/snmpd [ -d debuglevel logfile ]
Description
The SNMP Agent, performs SNMP operations on an ULTRIX gateway or host. The daemon, which is started up by an entry in the file, sits in
the background and listens on SNMP port 161. When the daemon receives an SNMP packet from a Network Management Station (NMS), the daemon
performs SNMP operations on the packet and returns a valid response to the NMS.
The daemon extracts much of its information from kernel memory. Static variables whose values are not available in the kernel take values
from the SNMP configuration file,
SNMP Trap Support
The cold start and authentication failure trap types are supported by
The cold start trap type is generated by when is restarted. The authentication failure trap type is generated when an attempt at using a
community fails. The attempt fails when an unauthorized client tries to use or the community is used in a way that the community type does
not allow.
The daemon sends traps to all communities specified in the configuration file with a community type
The default is for the daemon to generate authentication failure traps. However, if the following clause is specified somewhere in the
file, authentication failure traps are not generated:
no_authen_traps
SNMP Sets
When the daemon receives a set-request packet, it processes the variables in the packet and verifies that they are valid read-write vari-
ables. While performing this verification, the daemon constructs a linked list of the set requests. After it has completed the verifica-
tion, it performs the actual set operations on the variables, as if they were being performed simultaneously. If any actual set operation
fails, all of the previous set variables from the set-request packet are restored to their old values.
SNMP Supported Variables
For a complete listing of the SNMP Management Information Base (MIB) variables that are supported, see the Guide to Networking.
Options
By default, the daemon uses the command to record its error messages. However, you can obtain certain debugging and trace information by
specifying the flag, the appropriate debug level, and a log file for the output on the command line.
-d debuglevel logfile
Outputs debugging and trace information.
You can specify any one of the following debug levels with the flag:
1 Print the version number, start time, and exit time of Also print out when an SNMP packet is received, the address of the sender, and
the packet size in bytes.
2 Print out what the daemon has read from the file.
3 Dump the SNMP packet that the daemon has just received and is about to process. Also print out the route and interface address that
the daemon is currently looking up. This debug level also dumps the SNMP packet that the server is sending back in response to a
received SNMP message.
4 Dump the variable tree. Also print out the static bootstrap array of tree information.
The output for a debug level includes the information for all levels including and below the level that you specify. For example, if you
specify a debug level of 3, your output includes debug information for levels 3, 2, and 1.
If no debug levels are set, detaches itself from the controlling terminal and executes in the background.
Restrictions
Not all of the MIB variables are supported.
Only the variable is settable.
Files
SNMP configuration file
See Alsosnmpext(3n), snmpd.conf(5n), snmpsetup(8n)
RFC 1066--Management Information Base for Network Management of TCP/IP-based Internets
RFC 1067--A Simple Network Management Protocol
Guide to Networking
snmpd(8n)