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Port 1053 (remote-as)

IANA assigns port 1053 to remote-as: Remote Assistant (RA).

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
remote-as TCP Remote Assistant (RA) Roman Kriis -
remote-as UDP Remote Assistant (RA) Roman Kriis -

Check what is listening on port 1053

Linux: is anything listening on TCP 1053?
sudo ss -tlnp 'sport = :1053'
Linux: UDP 1053
sudo ss -ulnp 'sport = :1053'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1053
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1053 '
Windows (Command Prompt)
netstat -ano | findstr :1053
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1053 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1053
From Windows
Test-NetConnection HOST -Port 1053
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1053

Block port 1053 in the firewall

ufw
sudo ufw deny 1053/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1053 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1053 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1053' -Direction Inbound -Protocol TCP -LocalPort 1053 -Action Block
ufw
sudo ufw deny 1053/udp
iptables
sudo iptables -A INPUT -p udp --dport 1053 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1053 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1053' -Direction Inbound -Protocol UDP -LocalPort 1053 -Action Block

Related ports

1051optima-vnet1052ddt1054brvread1055ansyslmd

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