HTTPfy

Port 1698 (rsvp-encap-1)

IANA assigns port 1698 to rsvp-encap-1: RSVP-ENCAPSULATION-1.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
rsvp-encap-1 TCP RSVP-ENCAPSULATION-1 - -
rsvp-encap-1 UDP RSVP-ENCAPSULATION-1 - -

Check what is listening on port 1698

Linux: is anything listening on TCP 1698?
sudo ss -tlnp 'sport = :1698'
Linux: UDP 1698
sudo ss -ulnp 'sport = :1698'
Linux / macOS: which process owns the port
sudo lsof -nP -i :1698
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':1698 '
Windows (Command Prompt)
netstat -ano | findstr :1698
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 1698 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 1698
From Windows
Test-NetConnection HOST -Port 1698
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 1698

Block port 1698 in the firewall

ufw
sudo ufw deny 1698/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 1698 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 1698 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 1698' -Direction Inbound -Protocol TCP -LocalPort 1698 -Action Block
ufw
sudo ufw deny 1698/udp
iptables
sudo iptables -A INPUT -p udp --dport 1698 -j DROP
nftables
sudo nft add rule inet filter input udp dport 1698 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 1698' -Direction Inbound -Protocol UDP -LocalPort 1698 -Action Block

Related ports

1696rrifmm1697rrisat1699rsvp-encap-21700mps-raft

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