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Port 4953 (dbsyncarbiter)

IANA assigns port 4953 to dbsyncarbiter: Synchronization Arbiter.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
dbsyncarbiter TCP Synchronization Arbiter Dave Neudoerffer 2 -

Registry dates for this port: registered 2009-11-18.

Check what is listening on port 4953

Linux: is anything listening on TCP 4953?
sudo ss -tlnp 'sport = :4953'
Linux / macOS: which process owns the port
sudo lsof -nP -i :4953
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':4953 '
Windows (Command Prompt)
netstat -ano | findstr :4953
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 4953 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 4953
From Windows
Test-NetConnection HOST -Port 4953

Block port 4953 in the firewall

ufw
sudo ufw deny 4953/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 4953 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 4953 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 4953' -Direction Inbound -Protocol TCP -LocalPort 4953 -Action Block

Related ports

4951pwgwims4952sagxtsds4969ccss-qmm4970ccss-qsm

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