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Port 3708 (sun-as-iiops)

IANA assigns port 3708 to sun-as-iiops: Sun App Svr - Naming.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
sun-as-iiops TCP Sun App Svr - Naming Abhijit Kumar -
sun-as-iiops UDP Sun App Svr - Naming Abhijit Kumar -

Registry dates for this port: registered 2005-11.

Check what is listening on port 3708

Linux: is anything listening on TCP 3708?
sudo ss -tlnp 'sport = :3708'
Linux: UDP 3708
sudo ss -ulnp 'sport = :3708'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3708
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3708 '
Windows (Command Prompt)
netstat -ano | findstr :3708
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3708 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3708
From Windows
Test-NetConnection HOST -Port 3708
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3708

Block port 3708 in the firewall

ufw
sudo ufw deny 3708/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3708 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3708 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3708' -Direction Inbound -Protocol TCP -LocalPort 3708 -Action Block
ufw
sudo ufw deny 3708/udp
iptables
sudo iptables -A INPUT -p udp --dport 3708 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3708 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3708' -Direction Inbound -Protocol UDP -LocalPort 3708 -Action Block

Related ports

3706rt-event3707rt-event-s3709ca-idms3710portgate-auth

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.