Registered · Cross-platform

8384 Syncthing GUI

TCP Unofficial
UDP
SCTP
DCCP

What it is

Syncthing web UI.

When / why

P2P file-sync management.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP Not applicable for this transport.
SCTP Not applicable for this transport.
DCCP Not applicable for this transport.

Port range

Registered (1024–49151). Assigned by IANA on request; usable without elevated privileges on most systems.

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Firewall rules for port 8384

Copy-ready inbound rules for the active transports. Replace every <source> placeholder with the specific host, subnet, or CIDR that should reach this port.

ufw

sudo ufw allow proto tcp from <source> to any port 8384

Allow TCP 8384 (Syncthing GUI). Replace <source> with the network/host that should reach it.

firewalld

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="8384" protocol="tcp" accept'

Allow TCP 8384 (Syncthing GUI) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 8384 accept

Allow TCP 8384 (Syncthing GUI). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 8384 -j ACCEPT

Allow TCP 8384 (Syncthing GUI). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-syncthinggui-8384 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 8384

Inbound rule for 8384 (Syncthing GUI). Set <source> to a CIDR; lower priority number = higher precedence.

AWS Security Group

aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=tcp,FromPort=8384,ToPort=8384,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 8384 (Syncthing GUI). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-syncthinggui-8384 --direction=INGRESS --action=ALLOW --rules=tcp:8384 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 8384 (Syncthing GUI). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Syncthing GUI 8384/TCP" dir=in action=allow protocol=TCP localport=8384 remoteip=<source>

Inbound TCP 8384 (Syncthing GUI). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Syncthing GUI 8384/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 8384 -RemoteAddress <source>

Inbound TCP 8384 (Syncthing GUI). Replace <source> with a host or subnet.

Rules are generated only for transports marked active for this port. They default to an inbound allow with an explicit source placeholder — never any. Review direction, scope, and rule precedence before applying in production.