HTTPfy

Port 2351 (psrserver)

IANA assigns port 2351 to psrserver.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
psrserver TCP psrserver - -
psrserver UDP psrserver - -

Check what is listening on port 2351

Linux: is anything listening on TCP 2351?
sudo ss -tlnp 'sport = :2351'
Linux: UDP 2351
sudo ss -ulnp 'sport = :2351'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2351
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2351 '
Windows (Command Prompt)
netstat -ano | findstr :2351
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2351 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2351
From Windows
Test-NetConnection HOST -Port 2351
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2351

Block port 2351 in the firewall

ufw
sudo ufw deny 2351/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2351 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2351 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2351' -Direction Inbound -Protocol TCP -LocalPort 2351 -Action Block
ufw
sudo ufw deny 2351/udp
iptables
sudo iptables -A INPUT -p udp --dport 2351 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2351 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2351' -Direction Inbound -Protocol UDP -LocalPort 2351 -Action Block

Related ports

2349redstorm-diag, redstorm_diag2350psbserver2352pslserver2353pspserver

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