Registered · Cross-platform

6112 dtspcd / Battle.net

TCP Yes
UDP Unofficial
SCTP —
DCCP —

What it is

CDE subprocess control (dtspcd); also Blizzard Battle.net.

When / why

Legacy Unix CDE or gaming. dtspcd had a notable RCE — patch/disable.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and standardized, specified, or widely used on this port.
UDP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
SCTP — Not applicable for this transport.
DCCP — Not applicable for this transport.
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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 6112

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 6112

Allow TCP 6112 (dtspcd / Battle.net). Replace <source> with the network/host that should reach it.

sudo ufw allow proto udp from <source> to any port 6112

Allow UDP 6112 (dtspcd / Battle.net). 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="6112" protocol="tcp" accept'

Allow TCP 6112 (dtspcd / Battle.net) from <source>. Run 'firewall-cmd --reload' afterwards.

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="6112" protocol="udp" accept'

Allow UDP 6112 (dtspcd / Battle.net) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 6112 accept

Allow TCP 6112 (dtspcd / Battle.net). Assumes table 'inet filter' with an 'input' chain.

nft add rule inet filter input ip saddr <source> udp dport 6112 accept

Allow UDP 6112 (dtspcd / Battle.net). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 6112 -j ACCEPT

Allow TCP 6112 (dtspcd / Battle.net). Persist with iptables-save/netfilter-persistent.

sudo iptables -A INPUT -p udp -s <source> --dport 6112 -j ACCEPT

Allow UDP 6112 (dtspcd / Battle.net). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-dtspcdbattlenet-6112 --priority 1000 --access Allow --direction Inbound --protocol "*" --source-address-prefixes <source> --destination-port-ranges 6112

Inbound rule for 6112 (dtspcd / Battle.net). 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=6112,ToPort=6112,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 6112 (dtspcd / Battle.net). Replace <source-cidr> (e.g. 10.0.0.0/16).

aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=udp,FromPort=6112,ToPort=6112,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound UDP 6112 (dtspcd / Battle.net). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-dtspcdbattlenet-6112 --direction=INGRESS --action=ALLOW --rules=tcp:6112,udp:6112 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 6112 (dtspcd / Battle.net). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow dtspcd / Battle.net 6112/TCP" dir=in action=allow protocol=TCP localport=6112 remoteip=<source>

Inbound TCP 6112 (dtspcd / Battle.net). Set remoteip to a host/subnet; 'any' is discouraged.

netsh advfirewall firewall add rule name="Allow dtspcd / Battle.net 6112/UDP" dir=in action=allow protocol=UDP localport=6112 remoteip=<source>

Inbound UDP 6112 (dtspcd / Battle.net). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow dtspcd / Battle.net 6112/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 6112 -RemoteAddress <source>

Inbound TCP 6112 (dtspcd / Battle.net). Replace <source> with a host or subnet.

New-NetFirewallRule -DisplayName "Allow dtspcd / Battle.net 6112/UDP" -Direction Inbound -Action Allow -Protocol UDP -LocalPort 6112 -RemoteAddress <source>

Inbound UDP 6112 (dtspcd / Battle.net). 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.