Port 2528 (ncr-ccl, ncr_ccl)

IANA assigns port 2528 to ncr-ccl, ncr_ccl: NCR CCL IANA assigned this well-formed service name as a replacement for "ncr_ccl"..

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

ncr-ccl TCP NCR CCL IANA assigned this well-formed service name as a replacement for "ncr_ccl". Amitava Dutta -

ncr_ccl TCP NCR CCL
This entry is an alias to "ncr-ccl". This entry is now historic, not usable for use with many common service discovery mechanisms. Amitava Dutta -

ncr-ccl UDP NCR CCL IANA assigned this well-formed service name as a replacement for "ncr_ccl". Amitava Dutta -

ncr_ccl UDP NCR CCL
This entry is an alias to "ncr-ccl". This entry is now historic, not usable for use with many common service discovery mechanisms. Amitava Dutta -

Check what is listening on port 2528

Linux: is anything listening on TCP 2528?

sudo ss -tlnp 'sport = :2528'

Linux: UDP 2528

sudo ss -ulnp 'sport = :2528'

Linux / macOS: which process owns the port

sudo lsof -nP -i :2528

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':2528 '

Windows (Command Prompt)

netstat -ano | findstr :2528

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2528 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine

nc -vz -w 5 HOST 2528

From Windows

Test-NetConnection HOST -Port 2528

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

nc -vzu -w 5 HOST 2528

Block port 2528 in the firewall

ufw

sudo ufw deny 2528/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 2528 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 2528 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 2528' -Direction Inbound -Protocol TCP -LocalPort 2528 -Action Block

ufw

sudo ufw deny 2528/udp