I'm trying to connect to port 25 with netcat from one virtual machine to another but It's telling me
no route to host although i can ping. I do have my firewall default policy set to drop but I have an exception to accept traffic for port 25 on that specific subnet. I can connect from VM 3 TO VM 2 on port 25 with nc but not from VM 2 TO 3.
When I show the listening services I have
*:25 which means it's listening for all ipv4 ip addresses and
:::25 for ipv6 addresses. I don't understand where the error is and why is not working both firewall rules accept traffic on port 25 so it's supposed to be connecting. I tried comparing the differences between both to see why I can connect from vm3 to vm2 but the configuration is all the same. Any suggestions on what could be the problem?
Update stopping the iptable service resolves the issue but I still need those rules to be present.