Registered · Cross-platform

8008 HTTP alt / Matrix

TCP Unofficial
UDP Unofficial
SCTP —
DCCP —

What it is

Alternate HTTP; Matrix homeserver federation over HTTP.

When / why

Secondary web/chat-federation traffic.

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.

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Firewall rules for port 8008

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 8008

Allow TCP 8008 (HTTP alt / Matrix). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 8008

Allow UDP 8008 (HTTP alt / Matrix). 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="8008" protocol="tcp" accept'

Allow TCP 8008 (HTTP alt / Matrix) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="8008" protocol="udp" accept'

Allow UDP 8008 (HTTP alt / Matrix) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 8008 accept

Allow TCP 8008 (HTTP alt / Matrix). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 8008 accept

Allow UDP 8008 (HTTP alt / Matrix). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 8008 -j ACCEPT

Allow TCP 8008 (HTTP alt / Matrix). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 8008 -j ACCEPT

Allow UDP 8008 (HTTP alt / Matrix). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-httpaltmatrix-8008 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 8008

Inbound rule for 8008 (HTTP alt / Matrix). 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=8008,ToPort=8008,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 8008 (HTTP alt / Matrix). 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=8008,ToPort=8008,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 8008 (HTTP alt / Matrix). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-httpaltmatrix-8008 --direction=INGRESS --action=ALLOW --rules=tcp:8008,udp:8008 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 8008 (HTTP alt / Matrix). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow HTTP alt / Matrix 8008/TCP" dir=in action=allow protocol=TCP localport=8008 remoteip=<source>

Inbound TCP 8008 (HTTP alt / Matrix). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow HTTP alt / Matrix 8008/UDP" dir=in action=allow protocol=UDP localport=8008 remoteip=<source>

Inbound UDP 8008 (HTTP alt / Matrix). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow HTTP alt / Matrix 8008/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 8008 -RemoteAddress <source>

Inbound TCP 8008 (HTTP alt / Matrix). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow HTTP alt / Matrix 8008/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 8008 -RemoteAddress <source>

Inbound UDP 8008 (HTTP alt / Matrix). 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.