Port 8027 (papachi-p2p-srv)

IANA assigns port 8027 to papachi-p2p-srv: peer tracker and data relay service.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

papachi-p2p-srv TCP peer tracker and data relay service Pavel Csefalvay -

papachi-p2p-srv UDP peer tracker and data relay service Pavel Csefalvay -

Registry dates for this port: registered 2020-09-18.

Linux: is anything listening on TCP 8027?

sudo ss -tlnp 'sport = :8027'

Linux: UDP 8027

sudo ss -ulnp 'sport = :8027'

Linux / macOS: which process owns the port

sudo lsof -nP -i :8027

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':8027 '

Windows (Command Prompt)

netstat -ano | findstr :8027

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8027 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 8027

From Windows

Test-NetConnection HOST -Port 8027

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 8027

ufw

sudo ufw deny 8027/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 8027 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 8027 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 8027' -Direction Inbound -Protocol TCP -LocalPort 8027 -Action Block

ufw

sudo ufw deny 8027/udp

iptables

sudo iptables -A INPUT -p udp --dport 8027 -j DROP

nftables

sudo nft add rule inet filter input udp dport 8027 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 8027' -Direction Inbound -Protocol UDP -LocalPort 8027 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.