Hm, weird... I don't think we're restricting any ports, and I'm pretty certain we didn't implement a new firewall on the vmnet virtual switches. (I did just write this down as a feature request earlier today as it so happens!).
Does the issue persist on Host Only, Bridged (if possible) or standard NAT?
Have you tried to enable promiscuos mode for the nics ?
ethernet0.noPromisc = "true" / "false"