[Python] PySNMP SNMPV3 Trap not being sent

I am implementing the pysnmp code for snmpv3, trying to send a trap over to a machine in my network. I can see that the trap is being seen in Wireshark but it does not show up in any of my trap receivers. The code is as below:

from pysnmp.hlapi import *

errorIndication, errorStatus, errorIndex, varBinds = next(
sendNotification(
SnmpEngine(OctetString(hexValue='8000000001020304')),
UsmUserData('usr', authKey='authh', privKey='privv',
authProtocol=usmHMACSHAAuthProtocol,
privProtocol=usmAesCfb128Protocol),
UdpTransportTarget('192.168.1.79',162),
ContextData(),
'trap',
NotificationType(ObjectIdentity('SNMPv2-MIB', 'authenticationFailure'))
)
)

if errorIndication:
print(errorIndication)


If I remove authKey, privKey, authProtocol and privProtocol, I can see the traps being recieved in the trap receiver but when I put them all in, I do not see the traps.

My questions are:

1. Does Ubuntu have to open up its 161 and 162 ports for windows machine to receive it?
2. Even with a hard coded Engine ID, I am able to send a trap with no authentication, but is it necessary to have the correct Engine ID in the case of full authentication ? Is that why the trap isn't showing up? If so, can someone guide me on finding the engine ID of the receiving system?
3. Can we surely say that since Wireshark is clearly seeing the trap come through, its only a matter of configuration on Trap receiver to show the trap?

I'm using Python 2.7

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