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Port 2859 (activememory)

IANA assigns port 2859 to activememory: Active Memory.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
activememory TCP Active Memory Joe Graham -
activememory UDP Active Memory Joe Graham -

Check what is listening on port 2859

Linux: is anything listening on TCP 2859?
sudo ss -tlnp 'sport = :2859'
Linux: UDP 2859
sudo ss -ulnp 'sport = :2859'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2859
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2859 '
Windows (Command Prompt)
netstat -ano | findstr :2859
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2859 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2859
From Windows
Test-NetConnection HOST -Port 2859
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2859

Block port 2859 in the firewall

ufw
sudo ufw deny 2859/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2859 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2859 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2859' -Direction Inbound -Protocol TCP -LocalPort 2859 -Action Block
ufw
sudo ufw deny 2859/udp
iptables
sudo iptables -A INPUT -p udp --dport 2859 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2859 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2859' -Direction Inbound -Protocol UDP -LocalPort 2859 -Action Block

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