Port 887 (iclcnet-svinfo, iclcnet_svinfo)

IANA assigns port 887 to iclcnet-svinfo, iclcnet_svinfo: ICL coNETion server info IANA assigned this well-formed service name as a replacement for "iclcnet_svinfo"..

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

IANA assignment

Service nameProtoDescriptionAssigneeReference

iclcnet-svinfo TCP ICL coNETion server info IANA assigned this well-formed service name as a replacement for "iclcnet_svinfo". Bob Lyon -

iclcnet_svinfo TCP ICL coNETion server info
This entry is an alias to "iclcnet-svinfo". This entry is now historic, not usable for use with many common service discovery mechanisms. Bob Lyon -

iclcnet-svinfo UDP ICL coNETion server info IANA assigned this well-formed service name as a replacement for "iclcnet_svinfo". Bob Lyon -

iclcnet_svinfo UDP ICL coNETion server info
This entry is an alias to "iclcnet-svinfo". This entry is now historic, not usable for use with many common service discovery mechanisms. Bob Lyon -

Check what is listening on port 887

Linux: is anything listening on TCP 887?

sudo ss -tlnp 'sport = :887'

Linux: UDP 887

sudo ss -ulnp 'sport = :887'

Linux / macOS: which process owns the port

sudo lsof -nP -i :887

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':887 '

Windows (Command Prompt)

netstat -ano | findstr :887

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 887 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 887

From Windows

Test-NetConnection HOST -Port 887

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

nc -vzu -w 5 HOST 887

Block port 887 in the firewall

ufw

sudo ufw deny 887/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 887 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 887 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 887' -Direction Inbound -Protocol TCP -LocalPort 887 -Action Block

ufw

sudo ufw deny 887/udp