Hi,
When I use the trapsess or trap2sink as follows to configure the agent to send
traps to a target, I see that a local listen port is also opened.
trapsess -v2c -cpublic 10.8.76.101
or
trap2sink 10.8.76.101 public
When I run a netstat command to get the list of all listen ports that are *NOT*
opened with the localhost IP i.e. netstat -an | grep -iE 'udp.*\*\.' | grep
-iEv '127.0.0.1',
I see the following output:
udp4 0 0 10.8.101.20.161 *.*
udp4 0 0 *.18748 *.*
Running the command, lsof | grep 18748 shows the following:
snmpd 58163 root 12u IPv4 0xfffff80033366b10 0t0
UDP *:18748
If I remove the trapsess/trap2sink directive, then this listen port is no
longer opened.
Why is this listen port opened on the local host when the trap target is a
remote machine? Would a remote machine connect to this port?
Since, it shows the port as “*.18478”, it has, most probably, been opened with
INADDR_ANY.
How can I change to listen on either <LOCAL_IP_ADDR>:<port> or
<127.0.0.1>:<port>?
Would I need to change the code or can this be accomplished by an extra
param(?) to the trap2sink/trapsess directive?
Thanks,
Ananth
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