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Port 1248 (hermes)

IANA assigns port 1248 to hermes.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
hermes TCP hermes - -
hermes UDP hermes - -

Check what is listening on port 1248

Linux: is anything listening on TCP 1248?
sudo ss -tlnp 'sport = :1248'
Linux: UDP 1248
sudo ss -ulnp 'sport = :1248'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1248
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1248 '
Windows (Command Prompt)
netstat -ano | findstr :1248
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1248 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1248
From Windows
Test-NetConnection HOST -Port 1248
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1248

Block port 1248 in the firewall

ufw
sudo ufw deny 1248/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1248 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1248 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1248' -Direction Inbound -Protocol TCP -LocalPort 1248 -Action Block
ufw
sudo ufw deny 1248/udp
iptables
sudo iptables -A INPUT -p udp --dport 1248 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1248 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1248' -Direction Inbound -Protocol UDP -LocalPort 1248 -Action Block

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