Well-known · macOS

625 Open Directory Proxy

TCP Unofficial
UDP No
SCTP
DCCP

What it is

macOS Open Directory proxy (ODProxy).

When / why

Directory services on macOS Server.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP No Not assigned, standardized, 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 625

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 625

Allow TCP 625 (Open Directory Proxy). 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="625" protocol="tcp" accept'

Allow TCP 625 (Open Directory Proxy) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 625 accept

Allow TCP 625 (Open Directory Proxy). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 625 -j ACCEPT

Allow TCP 625 (Open Directory Proxy). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-opendirectoryproxy-625 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 625

Inbound rule for 625 (Open Directory Proxy). 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=625,ToPort=625,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 625 (Open Directory Proxy). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-opendirectoryproxy-625 --direction=INGRESS --action=ALLOW --rules=tcp:625 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 625 (Open Directory Proxy). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Open Directory Proxy 625/TCP" dir=in action=allow protocol=TCP localport=625 remoteip=<source>

Inbound TCP 625 (Open Directory Proxy). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Open Directory Proxy 625/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 625 -RemoteAddress <source>

Inbound TCP 625 (Open Directory Proxy). 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.