Registered · Cross-platform

5318 CMC (Certificate Mgmt)

TCP Yes
UDP Reserved
SCTP
DCCP

What it is

Certificate Management over CMS.

When / why

PKI certificate enrollment.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and standardized, specified, or widely used on this port.
UDP Reserved Reserved by IANA, generally to prevent collisions after a withdrawn assignment.
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 5318

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 5318

Allow TCP 5318 (CMC (Certificate Mgmt)). 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="5318" protocol="tcp" accept'

Allow TCP 5318 (CMC (Certificate Mgmt)) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 5318 accept

Allow TCP 5318 (CMC (Certificate Mgmt)). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 5318 -j ACCEPT

Allow TCP 5318 (CMC (Certificate Mgmt)). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-cmccertificatemgmt-5318 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 5318

Inbound rule for 5318 (CMC (Certificate Mgmt)). 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=5318,ToPort=5318,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 5318 (CMC (Certificate Mgmt)). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-cmccertificatemgmt-5318 --direction=INGRESS --action=ALLOW --rules=tcp:5318 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 5318 (CMC (Certificate Mgmt)). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow CMC (Certificate Mgmt) 5318/TCP" dir=in action=allow protocol=TCP localport=5318 remoteip=<source>

Inbound TCP 5318 (CMC (Certificate Mgmt)). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow CMC (Certificate Mgmt) 5318/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 5318 -RemoteAddress <source>

Inbound TCP 5318 (CMC (Certificate Mgmt)). 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.