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Port 248 (bhfhs)

IANA assigns port 248 to bhfhs.

Well-known (system) port, 0-1023 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
bhfhs TCP bhfhs John Kelly -
bhfhs UDP bhfhs John Kelly -

Check what is listening on port 248

Linux: is anything listening on TCP 248?
sudo ss -tlnp 'sport = :248'
Linux: UDP 248
sudo ss -ulnp 'sport = :248'
Linux / macOS: which process owns the port
sudo lsof -nP -i :248
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':248 '
Windows (Command Prompt)
netstat -ano | findstr :248
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 248 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 248
From Windows
Test-NetConnection HOST -Port 248
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 248

Block port 248 in the firewall

ufw
sudo ufw deny 248/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 248 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 248 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 248' -Direction Inbound -Protocol TCP -LocalPort 248 -Action Block
ufw
sudo ufw deny 248/udp
iptables
sudo iptables -A INPUT -p udp --dport 248 -j DROP
nftables
sudo nft add rule inet filter input udp dport 248 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 248' -Direction Inbound -Protocol UDP -LocalPort 248 -Action Block

Related ports

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