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Port 3704 (adobeserver-4)

IANA assigns port 3704 to adobeserver-4: Adobe Server 4.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
adobeserver-4 TCP Adobe Server 4 Frank Soetebeer -
adobeserver-4 UDP Adobe Server 4 Frank Soetebeer -

Registry dates for this port: registered 2003-01.

Check what is listening on port 3704

Linux: is anything listening on TCP 3704?
sudo ss -tlnp 'sport = :3704'
Linux: UDP 3704
sudo ss -ulnp 'sport = :3704'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3704
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3704 '
Windows (Command Prompt)
netstat -ano | findstr :3704
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3704 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3704
From Windows
Test-NetConnection HOST -Port 3704
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3704

Block port 3704 in the firewall

ufw
sudo ufw deny 3704/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3704 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3704 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3704' -Direction Inbound -Protocol TCP -LocalPort 3704 -Action Block
ufw
sudo ufw deny 3704/udp
iptables
sudo iptables -A INPUT -p udp --dport 3704 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3704 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3704' -Direction Inbound -Protocol UDP -LocalPort 3704 -Action Block

Related ports

3702WS-Discovery3703adobeserver-33705adobeserver-53706rt-event

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