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Port 2885 (topflow)

IANA assigns port 2885 to topflow: TopFlow.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
topflow TCP TopFlow Ted Ross -
topflow UDP TopFlow Ted Ross -

Check what is listening on port 2885

Linux: is anything listening on TCP 2885?
sudo ss -tlnp 'sport = :2885'
Linux: UDP 2885
sudo ss -ulnp 'sport = :2885'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2885
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2885 '
Windows (Command Prompt)
netstat -ano | findstr :2885
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2885 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2885
From Windows
Test-NetConnection HOST -Port 2885
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2885

Block port 2885 in the firewall

ufw
sudo ufw deny 2885/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2885 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2885 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2885' -Direction Inbound -Protocol TCP -LocalPort 2885 -Action Block
ufw
sudo ufw deny 2885/udp
iptables
sudo iptables -A INPUT -p udp --dport 2885 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2885 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2885' -Direction Inbound -Protocol UDP -LocalPort 2885 -Action Block

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