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Port 5313 (rrdp)

IANA assigns port 5313 to rrdp: Real-time & Reliable Data.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rrdp TCP Real-time & Reliable Data Ted Hoshi -
rrdp UDP Real-time & Reliable Data Ted Hoshi -

Registry dates for this port: registered 2004-06.

Check what is listening on port 5313

Linux: is anything listening on TCP 5313?
sudo ss -tlnp 'sport = :5313'
Linux: UDP 5313
sudo ss -ulnp 'sport = :5313'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5313
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5313 '
Windows (Command Prompt)
netstat -ano | findstr :5313
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5313 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5313
From Windows
Test-NetConnection HOST -Port 5313
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5313

Block port 5313 in the firewall

ufw
sudo ufw deny 5313/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5313 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5313 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5313' -Direction Inbound -Protocol TCP -LocalPort 5313 -Action Block
ufw
sudo ufw deny 5313/udp
iptables
sudo iptables -A INPUT -p udp --dport 5313 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5313 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5313' -Direction Inbound -Protocol UDP -LocalPort 5313 -Action Block

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