Olá pessoal, desculpem se a pergunta for meio ignorante, sou leigo no assunto, é o seguinte: Comprei um roteador da Xiaomi, importado da china, modelo Mi Router 4A Gigabit, um excelente roteador, porém estou com uma dúvida referente à quantidade de portas abertas por padrão nele, um simples escaneamento no Nmap mostra uma dezena delas, assim que ligo ele, todas já estão abertas, não fiz nenhuma configuração manualmente, é padrão dele deixar elas assim. A minha pergunta é: Isso pode colocar em risco a segurança da minha rede? Pois em outros roteadores que eu tenho, um TP-Link TL-WR840N e um Mercusys MW301R, não existem todas essas portas abertas, segue detalhes do escaneamento:
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Starting Nmap 7.91 ( https://nmap.org ) at 2021-08-13 08:07 Hora oficial do Brasil
NSE: Loaded 153 scripts for scanning.
NSE: Script Pre-scanning.
Initiating NSE at 08:07
Completed NSE at 08:07, 0.00s elapsed
Initiating NSE at 08:07
Completed NSE at 08:07, 0.00s elapsed
Initiating NSE at 08:07
Completed NSE at 08:07, 0.00s elapsed
Initiating ARP Ping Scan at 08:07
Scanning 192.168.31.1 [1 port]
Completed ARP Ping Scan at 08:07, 0.42s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 08:07
Completed Parallel DNS resolution of 1 host. at 08:07, 0.00s elapsed
Initiating SYN Stealth Scan at 08:07
Scanning XiaoQiang (192.168.31.1) [65535 ports]
Discovered open port 80/tcp on 192.168.31.1
Discovered open port 53/tcp on 192.168.31.1
Discovered open port 8080/tcp on 192.168.31.1
Discovered open port 784/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 11.58% done; ETC: 08:12 (0:03:57 remaining)
Discovered open port 5081/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 22.85% done; ETC: 08:12 (0:03:26 remaining)
Discovered open port 8382/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 33.05% done; ETC: 08:12 (0:03:04 remaining)
Discovered open port 8191/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 44.81% done; ETC: 08:12 (0:02:29 remaining)
Discovered open port 8196/tcp on 192.168.31.1
Discovered open port 8195/tcp on 192.168.31.1
Discovered open port 8190/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 56.32% done; ETC: 08:12 (0:01:57 remaining)
Discovered open port 8384/tcp on 192.168.31.1
Discovered open port 8380/tcp on 192.168.31.1
Discovered open port 8899/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 67.97% done; ETC: 08:12 (0:01:25 remaining)
Discovered open port 8192/tcp on 192.168.31.1
Discovered open port 5351/tcp on 192.168.31.1
Discovered open port 8999/tcp on 192.168.31.1
SYN Stealth Scan Timing: About 79.17% done; ETC: 08:12 (0:00:56 remaining)
Discovered open port 8193/tcp on 192.168.31.1
Discovered open port 8098/tcp on 192.168.31.1
Discovered open port 8197/tcp on 192.168.31.1
Discovered open port 8381/tcp on 192.168.31.1
Discovered open port 8383/tcp on 192.168.31.1
Completed SYN Stealth Scan at 08:12, 263.57s elapsed (65535 total ports)