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Port 5401 (excerpts)

IANA assigns port 5401 to excerpts: Excerpt Search Secure.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
excerpts TCP Excerpt Search Secure John Hinsdale -
excerpts UDP Excerpt Search Secure John Hinsdale -

Check what is listening on port 5401

Linux: is anything listening on TCP 5401?
sudo ss -tlnp 'sport = :5401'
Linux: UDP 5401
sudo ss -ulnp 'sport = :5401'
Linux / macOS: which process owns the port
sudo lsof -nP -i :5401
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':5401 '
Windows (Command Prompt)
netstat -ano | findstr :5401
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 5401 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 5401
From Windows
Test-NetConnection HOST -Port 5401
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 5401

Block port 5401 in the firewall

ufw
sudo ufw deny 5401/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 5401 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 5401 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 5401' -Direction Inbound -Protocol TCP -LocalPort 5401 -Action Block
ufw
sudo ufw deny 5401/udp
iptables
sudo iptables -A INPUT -p udp --dport 5401 -j DROP
nftables
sudo nft add rule inet filter input udp dport 5401 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 5401' -Direction Inbound -Protocol UDP -LocalPort 5401 -Action Block

Related ports

5399securitychase5400excerpt5402mftp5403hpoms-ci-lstn

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