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Port 5103 (actifio-c2c)

IANA assigns port 5103 to actifio-c2c: Actifio C2C.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
actifio-c2c TCP Actifio C2C Ravi Kollipara -

Registry dates for this port: registered 2010-06-18.

Check what is listening on port 5103

Linux: is anything listening on TCP 5103?
sudo ss -tlnp 'sport = :5103'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5103
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5103 '
Windows (Command Prompt)
netstat -ano | findstr :5103
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5103 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5103
From Windows
Test-NetConnection HOST -Port 5103

Block port 5103 in the firewall

ufw
sudo ufw deny 5103/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5103 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5103 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5103' -Direction Inbound -Protocol TCP -LocalPort 5103 -Action Block

Related ports

5101talarian-tcp, talarian-udp5102oms-nonsecure5104tinymessage5105hughes-ap

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