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Port 2880 (synapse)

IANA assigns port 2880 to synapse: Synapse Transport.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
synapse TCP Synapse Transport Ali Fracyon -
synapse UDP Synapse Transport Ali Fracyon -

Check what is listening on port 2880

Linux: is anything listening on TCP 2880?
sudo ss -tlnp 'sport = :2880'
Linux: UDP 2880
sudo ss -ulnp 'sport = :2880'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2880
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2880 '
Windows (Command Prompt)
netstat -ano | findstr :2880
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2880 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2880
From Windows
Test-NetConnection HOST -Port 2880
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2880

Block port 2880 in the firewall

ufw
sudo ufw deny 2880/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2880 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2880 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2880' -Direction Inbound -Protocol TCP -LocalPort 2880 -Action Block
ufw
sudo ufw deny 2880/udp
iptables
sudo iptables -A INPUT -p udp --dport 2880 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2880 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2880' -Direction Inbound -Protocol UDP -LocalPort 2880 -Action Block

Related ports

2878aap2879ucentric-ds2881ndsp2882ndtp

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.