Port 3028 (LiebDevMgmt-DM, LiebDevMgmt_DM)

IANA assigns port 3028 to LiebDevMgmt-DM, LiebDevMgmt_DM: LiebDevMgmt_DM IANA assigned this well-formed service name as a replacement for "LiebDevMgmt_DM"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

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

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

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

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

Check what is listening on port 3028

Linux: is anything listening on TCP 3028?

sudo ss -tlnp 'sport = :3028'

Linux: UDP 3028

sudo ss -ulnp 'sport = :3028'

Linux / macOS: which process owns the port

sudo lsof -nP -i :3028

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':3028 '

Windows (Command Prompt)

netstat -ano | findstr :3028

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3028 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 3028

From Windows

Test-NetConnection HOST -Port 3028

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

nc -vzu -w 5 HOST 3028

Block port 3028 in the firewall

ufw

sudo ufw deny 3028/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 3028 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 3028 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 3028' -Direction Inbound -Protocol TCP -LocalPort 3028 -Action Block

ufw

sudo ufw deny 3028/udp