HTTPfy

Port 5770 (spramsd)

IANA assigns port 5770 to spramsd: x509solutions Secure Data.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
spramsd TCP x509solutions Secure Data Brendan Fay -
spramsd UDP x509solutions Secure Data Brendan Fay -

Registry dates for this port: registered 2006-02.

Check what is listening on port 5770

Linux: is anything listening on TCP 5770?
sudo ss -tlnp 'sport = :5770'
Linux: UDP 5770
sudo ss -ulnp 'sport = :5770'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5770
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5770 '
Windows (Command Prompt)
netstat -ano | findstr :5770
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5770 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5770
From Windows
Test-NetConnection HOST -Port 5770
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5770

Block port 5770 in the firewall

ufw
sudo ufw deny 5770/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5770 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5770 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5770' -Direction Inbound -Protocol TCP -LocalPort 5770 -Action Block
ufw
sudo ufw deny 5770/udp
iptables
sudo iptables -A INPUT -p udp --dport 5770 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5770 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5770' -Direction Inbound -Protocol UDP -LocalPort 5770 -Action Block

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