Registered · Cross-platform

8888 Jupyter / alt-HTTP

TCP Unofficial
UDP Unofficial
SCTP —
DCCP —

What it is

Jupyter notebooks, MAMP, various alt-HTTP services.

When / why

Notebook servers and dev tools. Token-protect Jupyter; never expose openly.

Protocol status detail

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

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

Browse all ports →

Firewall rules for port 8888

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

⚠ High exposure risk — this service should never be reachable from untrusted networks. Scope the rule to a management subnet or VPN.

ufw

sudo ufw allow proto tcp from <source> to any port 8888

Allow TCP 8888 (Jupyter / alt-HTTP). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 8888

Allow UDP 8888 (Jupyter / alt-HTTP). 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="8888" protocol="tcp" accept'

Allow TCP 8888 (Jupyter / alt-HTTP) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="8888" protocol="udp" accept'

Allow UDP 8888 (Jupyter / alt-HTTP) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 8888 accept

Allow TCP 8888 (Jupyter / alt-HTTP). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 8888 accept

Allow UDP 8888 (Jupyter / alt-HTTP). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 8888 -j ACCEPT

Allow TCP 8888 (Jupyter / alt-HTTP). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 8888 -j ACCEPT

Allow UDP 8888 (Jupyter / alt-HTTP). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-jupyteralthttp-8888 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 8888

Inbound rule for 8888 (Jupyter / alt-HTTP). 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=8888,ToPort=8888,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 8888 (Jupyter / alt-HTTP). Replace <source-cidr> (e.g. 10.0.0.0/16).

aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=udp,FromPort=8888,ToPort=8888,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 8888 (Jupyter / alt-HTTP). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-jupyteralthttp-8888 --direction=INGRESS --action=ALLOW --rules=tcp:8888,udp:8888 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 8888 (Jupyter / alt-HTTP). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Jupyter / alt-HTTP 8888/TCP" dir=in action=allow protocol=TCP localport=8888 remoteip=<source>

Inbound TCP 8888 (Jupyter / alt-HTTP). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow Jupyter / alt-HTTP 8888/UDP" dir=in action=allow protocol=UDP localport=8888 remoteip=<source>

Inbound UDP 8888 (Jupyter / alt-HTTP). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Jupyter / alt-HTTP 8888/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 8888 -RemoteAddress <source>

Inbound TCP 8888 (Jupyter / alt-HTTP). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow Jupyter / alt-HTTP 8888/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 8888 -RemoteAddress <source>

Inbound UDP 8888 (Jupyter / alt-HTTP). 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.