49152–65535 Ephemeral / dynamic rangePrivate/ephemeral ports for outbound source ports and short-lived services; cannot be IANA-registered.
Stateful firewalls auto-permit return traffic here. Also used by Windows RPC dynamic allocation (see 135).
| Transport | Status | Meaning |
|---|---|---|
| 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. |
Dynamic / private (49152–65535). Cannot be IANA-registered; used for ephemeral allocation and custom services.
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Copy-ready inbound rules for the active transports. Replace every <source> placeholder with the specific host, subnet, or CIDR that should reach this port.
sudo ufw allow proto tcp from <source> to any port 49152:65535Allow TCP 49152–65535 (Ephemeral / dynamic range). Replace <source> with the network/host that should reach it.
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="49152-65535" protocol="tcp" accept'Allow TCP 49152–65535 (Ephemeral / dynamic range) from <source>. Run 'firewall-cmd --reload' afterwards.
nft add rule inet filter input ip saddr <source> tcp dport 49152-65535 acceptAllow TCP 49152–65535 (Ephemeral / dynamic range). Assumes table 'inet filter' with an 'input' chain.
sudo iptables -A INPUT -p tcp -s <source> --dport 49152:65535 -j ACCEPTAllow TCP 49152–65535 (Ephemeral / dynamic range). Persist with iptables-save/netfilter-persistent.
az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-ephemeraldynamicrange-49152-65535 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 49152-65535Inbound rule for 49152–65535 (Ephemeral / dynamic range). Set <source> to a CIDR; lower priority number = higher precedence.
aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=tcp,FromPort=49152,ToPort=65535,IpRanges="[{CidrIp=<source-cidr>}]"Inbound TCP 49152–65535 (Ephemeral / dynamic range). Replace <source-cidr> (e.g. 10.0.0.0/16).
gcloud compute firewall-rules create allow-ephemeraldynamicrange-49152-65535 --direction=INGRESS --action=ALLOW --rules=tcp:49152-65535 --source-ranges=<source-cidr> --network=<network>Ingress rule for 49152–65535 (Ephemeral / dynamic range). Scope with --source-ranges and optionally --target-tags.
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.