HTTPfy

Port 2353 (pspserver)

IANA assigns port 2353 to pspserver.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
pspserver TCP pspserver - -
pspserver UDP pspserver - -

Check what is listening on port 2353

Linux: is anything listening on TCP 2353?
sudo ss -tlnp 'sport = :2353'
Linux: UDP 2353
sudo ss -ulnp 'sport = :2353'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2353
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2353 '
Windows (Command Prompt)
netstat -ano | findstr :2353
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2353 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2353
From Windows
Test-NetConnection HOST -Port 2353
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2353

Block port 2353 in the firewall

ufw
sudo ufw deny 2353/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2353 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2353 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2353' -Direction Inbound -Protocol TCP -LocalPort 2353 -Action Block
ufw
sudo ufw deny 2353/udp
iptables
sudo iptables -A INPUT -p udp --dport 2353 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2353 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2353' -Direction Inbound -Protocol UDP -LocalPort 2353 -Action Block

Related ports

2351psrserver2352pslserver2354psprserver2355psdbserver

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