Dynamic · Cross-platform

64738 Mumble

TCP Unofficial
UDP
SCTP
DCCP

What it is

Mumble VoIP server (Murmur).

When / why

Low-latency voice chat.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP Not applicable for this transport.
SCTP Not applicable for this transport.
DCCP Not applicable for this transport.

Port range

Dynamic / private (49152–65535). Cannot be IANA-registered; used for ephemeral allocation and custom services.

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Firewall rules for port 64738

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 64738

Allow TCP 64738 (Mumble). 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="64738" protocol="tcp" accept'

Allow TCP 64738 (Mumble) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 64738 accept

Allow TCP 64738 (Mumble). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 64738 -j ACCEPT

Allow TCP 64738 (Mumble). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-mumble-64738 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 64738

Inbound rule for 64738 (Mumble). 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=64738,ToPort=64738,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 64738 (Mumble). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-mumble-64738 --direction=INGRESS --action=ALLOW --rules=tcp:64738 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 64738 (Mumble). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow Mumble 64738/TCP" dir=in action=allow protocol=TCP localport=64738 remoteip=<source>

Inbound TCP 64738 (Mumble). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow Mumble 64738/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 64738 -RemoteAddress <source>

Inbound TCP 64738 (Mumble). 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.