HTTPfy

Port 3495 (seclayer-tcp)

IANA assigns port 3495 to seclayer-tcp: securitylayer over tcp.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
seclayer-tcp TCP securitylayer over tcp - -
seclayer-tcp UDP securitylayer over tcp - -

Check what is listening on port 3495

Linux: is anything listening on TCP 3495?
sudo ss -tlnp 'sport = :3495'
Linux: UDP 3495
sudo ss -ulnp 'sport = :3495'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3495
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3495 '
Windows (Command Prompt)
netstat -ano | findstr :3495
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3495 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3495
From Windows
Test-NetConnection HOST -Port 3495
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3495

Block port 3495 in the firewall

ufw
sudo ufw deny 3495/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3495 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3495 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3495' -Direction Inbound -Protocol TCP -LocalPort 3495 -Action Block
ufw
sudo ufw deny 3495/udp
iptables
sudo iptables -A INPUT -p udp --dport 3495 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3495 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3495' -Direction Inbound -Protocol UDP -LocalPort 3495 -Action Block

Related ports

3493nut3494ibm34943496seclayer-tls3497ipether232port

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