Port 5905 (asmgcs)

IANA assigns port 5905 to asmgcs: Adv Surface Mvmnt and Guidance Cont Sys.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

asmgcs TCP Adv Surface Mvmnt and Guidance Cont Sys
Defined TXT keys: ASMGCS International Civil Aviation Organisation -

asmgcs UDP Adv Surface Mvmnt and Guidance Cont Sys
Defined TXT keys: ASMGCS International Civil Aviation Organisation -

asmgcs SCTP Adv Surface Mvmnt and Guidance Cont Sys
Defined TXT keys: ASMGCS International Civil Aviation Organisation -

Registry dates for this port: registered 2022-06-03.

Linux: is anything listening on TCP 5905?

sudo ss -tlnp 'sport = :5905'

Linux: UDP 5905

sudo ss -ulnp 'sport = :5905'

Linux / macOS: which process owns the port

sudo lsof -nP -i :5905

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':5905 '

Windows (Command Prompt)

netstat -ano | findstr :5905

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5905 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 5905

From Windows

Test-NetConnection HOST -Port 5905

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 5905

ufw

sudo ufw deny 5905/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 5905 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 5905 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 5905' -Direction Inbound -Protocol TCP -LocalPort 5905 -Action Block

ufw

sudo ufw deny 5905/udp

iptables

sudo iptables -A INPUT -p udp --dport 5905 -j DROP

nftables

sudo nft add rule inet filter input udp dport 5905 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 5905' -Direction Inbound -Protocol UDP -LocalPort 5905 -Action Block

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.