HTTPfy

Port 2355 (psdbserver)

IANA assigns port 2355 to psdbserver.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
psdbserver TCP psdbserver Paul Reddy -
psdbserver UDP psdbserver Paul Reddy -

Check what is listening on port 2355

Linux: is anything listening on TCP 2355?
sudo ss -tlnp 'sport = :2355'
Linux: UDP 2355
sudo ss -ulnp 'sport = :2355'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2355
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2355 '
Windows (Command Prompt)
netstat -ano | findstr :2355
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2355 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2355
From Windows
Test-NetConnection HOST -Port 2355
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2355

Block port 2355 in the firewall

ufw
sudo ufw deny 2355/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2355 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2355 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2355' -Direction Inbound -Protocol TCP -LocalPort 2355 -Action Block
ufw
sudo ufw deny 2355/udp
iptables
sudo iptables -A INPUT -p udp --dport 2355 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2355 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2355' -Direction Inbound -Protocol UDP -LocalPort 2355 -Action Block

Related ports

2353pspserver2354psprserver2356gxtelmd2357unihub-server

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