HTTPfy

Port 8276 (ms-mcc)

IANA assigns port 8276 to ms-mcc: Microsoft Connected Cache.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ms-mcc TCP Microsoft Connected Cache Microsoft Corporation 6 -
ms-mcc UDP Microsoft Connected Cache Microsoft Corporation 6 -

Registry dates for this port: registered 2008-02-27, last modified 2022-05-03.

Check what is listening on port 8276

Linux: is anything listening on TCP 8276?
sudo ss -tlnp 'sport = :8276'
Linux: UDP 8276
sudo ss -ulnp 'sport = :8276'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8276
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8276 '
Windows (Command Prompt)
netstat -ano | findstr :8276
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8276 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8276
From Windows
Test-NetConnection HOST -Port 8276
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 8276

Block port 8276 in the firewall

ufw
sudo ufw deny 8276/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8276 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8276 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8276' -Direction Inbound -Protocol TCP -LocalPort 8276 -Action Block
ufw
sudo ufw deny 8276/udp
iptables
sudo iptables -A INPUT -p udp --dport 8276 -j DROP
nftables
sudo nft add rule inet filter input udp dport 8276 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 8276' -Direction Inbound -Protocol UDP -LocalPort 8276 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.