Is port 4000 (ICQ / Diablo II) dangerous?

Port 4000 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 4000 be open on my firewall?

Port 4000 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 4000 use?

Port 4000 (ICQ / Diablo II) uses the TCP/UDP transport protocol and falls under the Messaging category.

:4000 (TCP/UDP)

ICQ / Diablo II

Medium Risiko

TCP/UDP — Messaging

Ikhtisar Port

Nomor Port 4000

Nama Layanan ICQ / Diablo II

Protokol Transport TCP/UDP

Kategori Messaging

Risiko Keamanan Medium

Rentang Port Terdaftar (1024-49151)

Apa itu Port 4000?

Port 4000 is associated with ICQ instant messaging (legacy) and Blizzard's Diablo II game server. Various custom applications also use this port as a default. It is in the registered port range and frequently appears in network scans due to its use by multiple different services.

TCP/UDP Messaging

Pertimbangan Keamanan

Port 4000 (ICQ / Diablo II) diklasifikasikan sebagai risiko sedang. Meskipun layanan ini umumnya diekspos, pertimbangkan untuk menggunakan alternatif terenkripsi jika tersedia.

Rekomendasi: Jaga layanan tetap diperbarui. Pantau log untuk aktivitas yang tidak biasa.

Port Terkait — Messaging

18 MSP 87 ttylink / link 98 TACNews 99 Metagram 119 NNTP 169 SEND 194 IRC 218 MPP

Istilah Terkait

ARP FTP HTTP ICMP IMAP NTP