Port 1138 (encrypted-admin, encrypted_admin)

IANA assigns port 1138 to encrypted-admin, encrypted_admin: encrypted admin requests IANA assigned this well-formed service name as a replacement for "encrypted_admin"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

encrypted-admin TCP encrypted admin requests IANA assigned this well-formed service name as a replacement for "encrypted_admin". Michael Elizarov -

encrypted_admin TCP encrypted admin requests
This entry is an alias to "encrypted-admin". This entry is now historic, not usable for use with many common service discovery mechanisms. Michael Elizarov -

encrypted-admin UDP encrypted admin requests IANA assigned this well-formed service name as a replacement for "encrypted_admin". Michael Elizarov -

encrypted_admin UDP encrypted admin requests
This entry is an alias to "encrypted-admin". This entry is now historic, not usable for use with many common service discovery mechanisms. Michael Elizarov -

Registry dates for this port: registered 2007-01.

Check what is listening on port 1138

Linux: is anything listening on TCP 1138?

sudo ss -tlnp 'sport = :1138'

Linux: UDP 1138

sudo ss -ulnp 'sport = :1138'

Linux / macOS: which process owns the port

sudo lsof -nP -i :1138

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':1138 '

Windows (Command Prompt)

netstat -ano | findstr :1138

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1138 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 1138

From Windows

Test-NetConnection HOST -Port 1138

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

nc -vzu -w 5 HOST 1138

Block port 1138 in the firewall

ufw

sudo ufw deny 1138/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 1138 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 1138 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 1138' -Direction Inbound -Protocol TCP -LocalPort 1138 -Action Block

ufw

sudo ufw deny 1138/udp