Port 3027 (LiebDevMgmt-C, LiebDevMgmt_C)

IANA assigns port 3027 to LiebDevMgmt-C, LiebDevMgmt_C: LiebDevMgmt_C IANA assigned this well-formed service name as a replacement for "LiebDevMgmt_C"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

LiebDevMgmt-C TCP LiebDevMgmt_C IANA assigned this well-formed service name as a replacement for "LiebDevMgmt_C". - -

LiebDevMgmt_C TCP LiebDevMgmt_C
This entry is an alias to "LiebDevMgmt-C". This entry is now historic, not usable for use with many common service discovery mechanisms. - -

LiebDevMgmt-C UDP LiebDevMgmt_C IANA assigned this well-formed service name as a replacement for "LiebDevMgmt_C". - -

LiebDevMgmt_C UDP LiebDevMgmt_C
This entry is an alias to "LiebDevMgmt-C". This entry is now historic, not usable for use with many common service discovery mechanisms. - -

Check what is listening on port 3027

Linux: is anything listening on TCP 3027?

sudo ss -tlnp 'sport = :3027'

Linux: UDP 3027

sudo ss -ulnp 'sport = :3027'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3027

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3027 '

Windows (Command Prompt)

netstat -ano | findstr :3027

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3027 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3027

From Windows

Test-NetConnection HOST -Port 3027

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

nc -vzu -w 5 HOST 3027

Block port 3027 in the firewall

ufw

sudo ufw deny 3027/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3027 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3027 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3027' -Direction Inbound -Protocol TCP -LocalPort 3027 -Action Block

ufw

sudo ufw deny 3027/udp