Registered · Cross-platform

2761 DICOM over ISCL

TCP Yes
UDP
SCTP
DCCP

What it is

DICOM over Integrated Secure Communication Layer.

When / why

Secured medical imaging.

Protocol status detail

TransportStatusMeaning
TCP Yes Assigned by IANA and 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

Registered (1024–49151). Assigned by IANA on request; usable without elevated privileges on most systems.

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Firewall rules for port 2761

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 2761

Allow TCP 2761 (DICOM over ISCL). 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="2761" protocol="tcp" accept'

Allow TCP 2761 (DICOM over ISCL) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 2761 accept

Allow TCP 2761 (DICOM over ISCL). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 2761 -j ACCEPT

Allow TCP 2761 (DICOM over ISCL). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-dicomoveriscl-2761 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 2761

Inbound rule for 2761 (DICOM over ISCL). 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=2761,ToPort=2761,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 2761 (DICOM over ISCL). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-dicomoveriscl-2761 --direction=INGRESS --action=ALLOW --rules=tcp:2761 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 2761 (DICOM over ISCL). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow DICOM over ISCL 2761/TCP" dir=in action=allow protocol=TCP localport=2761 remoteip=<source>

Inbound TCP 2761 (DICOM over ISCL). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow DICOM over ISCL 2761/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 2761 -RemoteAddress <source>

Inbound TCP 2761 (DICOM over ISCL). 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.