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Port 3955 (p2pcommunity)

IANA assigns port 3955 to p2pcommunity: p2pCommunity.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
p2pcommunity TCP p2pCommunity Tiago Bittencourt Si -
p2pcommunity UDP p2pCommunity Tiago Bittencourt Si -

Registry dates for this port: registered 2005-08.

Check what is listening on port 3955

Linux: is anything listening on TCP 3955?
sudo ss -tlnp 'sport = :3955'
Linux: UDP 3955
sudo ss -ulnp 'sport = :3955'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3955
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3955 '
Windows (Command Prompt)
netstat -ano | findstr :3955
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3955 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3955
From Windows
Test-NetConnection HOST -Port 3955
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3955

Block port 3955 in the firewall

ufw
sudo ufw deny 3955/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3955 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3955 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3955' -Direction Inbound -Protocol TCP -LocalPort 3955 -Action Block
ufw
sudo ufw deny 3955/udp
iptables
sudo iptables -A INPUT -p udp --dport 3955 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3955 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3955' -Direction Inbound -Protocol UDP -LocalPort 3955 -Action Block

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3953xmlink-connect3954adrep3956gvcp3957mqe-broker

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