Microsoft Remote Desktop só funciona com ip público

Question

Estou tendo um problema estranho. Quando eu tento RDP no meu servidor usando seu ip local (192.168.0.30) meu cliente RDP fica preso em "Credenciais de Negociação". Se eu usar o meu ip publico / internet (porta 3389 exposta a internet) ele funciona bem.

Cada cliente abaixo mostra o mesmo comportamento (funciona usando o IP da WAN; falha com o IP da LAN)

Clientes RDP testados:

• Microsoft Remote Desktop Mac
• Microsoft Remote Desktop Mac Beta
• Conexão de Área de Trabalho Remota (com Windows)
• Microsoft RDP Client Android

Versão do Windows: 8.1 Pro

Alguns registros:

[2018-Apr-15 10:58:50] RDP (0): --- BEGIN INTERFACE LIST ---
[2018-Apr-15 10:58:50] RDP (0): lo0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): lo0 af=2 (AF_INET)  addr=127.0.0.1 netmask=255.0.0.0
[2018-Apr-15 10:58:50] RDP (0): lo0 af=30 (AF_INET6)  addr=::1 netmask=ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
[2018-Apr-15 10:58:50] RDP (0): lo0 af=30 (AF_INET6)  addr=fe80::1%lo0 netmask=ffff:ffff:ffff:ffff::
[2018-Apr-15 10:58:50] RDP (0): gif0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): stf0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): en0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): en0 af=30 (AF_INET6)  addr=fe80::1088:3af5:ffd5:d57b%en0 netmask=ffff:ffff:ffff:ffff::
[2018-Apr-15 10:58:50] RDP (0): en0 af=2 (AF_INET)  addr=192.168.0.25 netmask=255.255.255.0
[2018-Apr-15 10:58:50] RDP (0): en1 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): en2 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): bridge0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): p2p0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): awdl0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): awdl0 af=30 (AF_INET6)  addr=fe80::784a:38ff:fee3:da4d%awdl0 netmask=ffff:ffff:ffff:ffff::
[2018-Apr-15 10:58:50] RDP (0): utun0 af=18  addr= netmask=
[2018-Apr-15 10:58:50] RDP (0): utun0 af=30 (AF_INET6)  addr=fe80::b2eb:9d8e:546f:9c59%utun0 netmask=ffff:ffff:ffff:ffff::
[2018-Apr-15 10:58:50] RDP (0): --- END INTERFACE LIST ---
[2018-Apr-15 10:58:50] RDP (0): correlation id: correlation not set or of invalid length
[2018-Apr-15 10:58:50] RDP (0): Resolved '192.168.0.30' to '192.168.0.30' using NameResolveMethod_DNS(1)
[2018-Apr-15 10:58:50] RDP (0): Protocol state changed to: ProtocolConnectingNetwork(1)
[2018-Apr-15 10:58:50] RDP (0): Protocol state changed to: ProtocolNegotiatingCredentials(2)
[2018-Apr-15 10:59:11] RDP (0): Exception caught: Exception in file '../../librdpclient/asiosocketendpoint.cpp' at line 400
    User Message : Connection reset by peer
[2018-Apr-15 10:59:11] RDP (0): correlation id: correlation not set or of invalid length
[2018-Apr-15 10:59:11] RDP (0): Protocol state changed to: ProtocolConnectingNetwork(1)
[2018-Apr-15 10:59:11] RDP (0): Resolved '192.168.0.30' to '192.168.0.30' using NameResolveMethod_DNS(1)
[2018-Apr-15 10:59:11] RDP (0): Protocol state changed to: ProtocolNegotiatingCredentials(2)
[2018-Apr-15 10:59:32] RDP (0): Exception caught: Exception in file '../../librdpclient/asiosocketendpoint.cpp' at line 400
    User Message : Connection reset by peer
[2018-Apr-15 10:59:32] RDP (0): Protocol state changed to: ProtocolDisconnecting(7)
[2018-Apr-15 10:59:32] RDP (0): Protocol state changed to: ProtocolDisconnected(8)
[2018-Apr-15 10:59:32] RDP (0): ------ END ACTIVE CONNECTION ------

O Firewall do Windows está desativado e não há antivírus instalado.

Não consigo pensar em nenhum motivo pelo qual ele falhe ao usar meu ip local. Eu só posso supor que é um problema de configuração no roteador ou no computador host.