Connection problems between 2 computers on the same LAN

Hi All!

I am trying to run DDS 6.0.1 on 2 win 10 hosts and make them communicate, both windows firewalls are disabled, on localhost everything goes smoothly. I tried running rtiddsping on both machines (one as subscriber, other as publisher), but it seems they don't see each other.

I also tried rtiddsspy and it seems that each computer can see the topics that are started on the other machine:

RTI Connext DDS Spy built with DDS version: 6.0.1 (Core: 1.9a.00, C: 1.9a.00, C++: 1.9a.00)
Copyright 2012 Real-Time Innovations, Inc.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
rtiddsspy is listening for data, press CTRL+C to stop it.

source_timestamp Info Src HostId topic type
----------------- ---- ---------- ------------------ ------------------
1583102323.051999 W +N C0A8014E ph_topic ph2
1583102360.860988 d +N C0A8014E ph_topic ph2
1583102361.060999 d +M C0A8014E ph_topic ph2

Also, I checked pinging 224.0.0.1, it goes well on one of the computers, but on the other one it answers as:

Pinging 224.0.0.1 with 32 bytes of data:
PING: transmit failed. General failure.

I tried igmpquery and it resulted as follows, so it sees it also found the other end on the network.

IGMP query generator V1.4
Project web site: http://code.google.com/p/igmpquery/
Requires WinPcap

\Device\NPF_{CD7EFA8C-7C44-4F7B-94C3-782595122BC3}
Description: Microsoft

Address Family Name: AF_INET
Address: 192.168.1.69
Netmask: 255.255.255.0
Broadcast Address: 255.255.255.255
IGMPv2 general query 192.168.1.69 -> 224.0.0.1

listening for responses ...

\Device\NPF_{042CDDB6-9314-4F1C-A5E0-41129C3C1671}
Description: USB3.0 to Gigabit Ethernet Adapt

Address Family Name: AF_INET
Address: 192.168.1.64
Netmask: 255.255.255.0
Broadcast Address: 255.255.255.255
IGMPv2 general query 192.168.1.64 -> 224.0.0.1

listening for responses ...

\Device\NPF_{51EF9EFA-EEAB-4399-B635-D2C2F0CAE32D}
Description: Intel(R) Ethernet Connection (5) I219-LM

Address Family Name: AF_INET
Address: 192.168.1.72
Netmask: 255.255.255.0
Broadcast Address: 255.255.255.255
IGMPv2 general query 192.168.1.72 -> 224.0.0.1

listening for responses ...
23:20:14.207 192.168.1.78 -> 224.0.0.251 IGMP Rpt 224.0.0.251
23:20:14.207 192.168.1.78 -> 224.0.0.252 IGMP Rpt 224.0.0.252
23:20:14.207 192.168.1.78 ->239.255.255.250 IGMP Rpt 239.255.255.250
23:20:14.275 192.168.1.73 -> 224.0.0.251 IGMP Rpt 224.0.0.251
23:20:14.431 192.168.1.67 ->239.255.255.250 IGMP Rpt 239.255.255.250
23:20:14.628 192.168.1.74 -> 224.0.0.251 IGMP Rpt 224.0.0.251
23:20:14.658 192.168.1.74 -> 239.255.3.22 IGMP Rpt 239.255.3.22
23:20:14.823 192.168.1.84 -> 224.0.1.60 IGMP Rpt 224.0.1.60
23:20:15.142 192.168.1.84 ->239.255.255.250 IGMP Rpt 239.255.255.250

\Device\NPF_{97E738FB-7C6B-44A2-94E6-849711BE5FEA}
Description: Juniper Network Connect Virtual Adapter

\Device\NPF_{34300D3D-4A5E-4FFC-AAC3-858698ABE021}
Description: Microsoft

\Device\NPF_{A2831814-A4AF-4FE4-A8E4-88FAD0E560D4}
Description: Microsoft Corporation

Address Family Name: AF_INET
Address: 192.168.70.209
Netmask: 255.255.255.240
Broadcast Address: 255.255.255.255
IGMPv2 general query 192.168.70.209 -> 224.0.0.1

listening for responses ...
23:20:24.558 192.168.70.209 -> 224.0.0.251 IGMP Rpt 224.0.0.251
23:20:24.558 192.168.70.209 ->239.255.255.250 IGMP Rpt 239.255.255.250

Could you please help me out?

Thanks in advance:

Ben