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Port 2255 (vrtp)

IANA assigns port 2255 to vrtp: VRTP - ViRtue Transfer Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
vrtp TCP VRTP - ViRtue Transfer Protocol Max Fudim -
vrtp UDP VRTP - ViRtue Transfer Protocol Max Fudim -

Check what is listening on port 2255

Linux: is anything listening on TCP 2255?
sudo ss -tlnp 'sport = :2255'
Linux: UDP 2255
sudo ss -ulnp 'sport = :2255'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2255
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2255 '
Windows (Command Prompt)
netstat -ano | findstr :2255
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2255 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2255
From Windows
Test-NetConnection HOST -Port 2255
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2255

Block port 2255 in the firewall

ufw
sudo ufw deny 2255/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2255 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2255 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2255' -Direction Inbound -Protocol TCP -LocalPort 2255 -Action Block
ufw
sudo ufw deny 2255/udp
iptables
sudo iptables -A INPUT -p udp --dport 2255 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2255 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2255' -Direction Inbound -Protocol UDP -LocalPort 2255 -Action Block

Related ports

2253dtv-chan-req2254seispoc2256pcc-mfp2257simple-tx-rx

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