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Port 3488 (fs-rh-srv)

IANA assigns port 3488 to fs-rh-srv: FS Remote Host Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
fs-rh-srv TCP FS Remote Host Server Brian Nickles -
fs-rh-srv UDP FS Remote Host Server Brian Nickles -

Registry dates for this port: registered 2002-05.

Check what is listening on port 3488

Linux: is anything listening on TCP 3488?
sudo ss -tlnp 'sport = :3488'
Linux: UDP 3488
sudo ss -ulnp 'sport = :3488'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3488
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3488 '
Windows (Command Prompt)
netstat -ano | findstr :3488
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3488 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3488
From Windows
Test-NetConnection HOST -Port 3488
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3488

Block port 3488 in the firewall

ufw
sudo ufw deny 3488/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3488 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3488 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3488' -Direction Inbound -Protocol TCP -LocalPort 3488 -Action Block
ufw
sudo ufw deny 3488/udp
iptables
sudo iptables -A INPUT -p udp --dport 3488 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3488 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3488' -Direction Inbound -Protocol UDP -LocalPort 3488 -Action Block

Related ports

3486ifsf-hb-port3487ltctcp, ltcudp3489dtp-dia3490colubris

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