Well-known · macOS

548 AFP

TCP Yes
UDP Assigned
SCTP
DCCP

What it is

Apple Filing Protocol for macOS file sharing.

When / why

Legacy Mac file shares; Apple now favours SMB.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and standardized, specified, or widely used on this port.
UDP Assigned Assigned by IANA, but not standardized, specified, or widely used on this port.
SCTP Not applicable for this transport.
DCCP Not applicable for this transport.

Port range

Well-known (0–1023). System port for a core service. On Unix-like systems, binding it requires superuser privileges.

Browse all ports →

Firewall rules for port 548

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 548

Allow TCP 548 (AFP). 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="548" protocol="tcp" accept'

Allow TCP 548 (AFP) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 548 accept

Allow TCP 548 (AFP). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 548 -j ACCEPT

Allow TCP 548 (AFP). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-afp-548 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 548

Inbound rule for 548 (AFP). 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=548,ToPort=548,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 548 (AFP). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-afp-548 --direction=INGRESS --action=ALLOW --rules=tcp:548 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 548 (AFP). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow AFP 548/TCP" dir=in action=allow protocol=TCP localport=548 remoteip=<source>

Inbound TCP 548 (AFP). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow AFP 548/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 548 -RemoteAddress <source>

Inbound TCP 548 (AFP). 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.