Network Firewall Rules

Make sure firewall rules have been configured to alow the required network connections.

"Direction" of the network traffic is referenced to the network where the Contour Web or Corda Server is hosted, with assumption that the servers/databases are within the same network. Incoming as Inbound, outgoing as Outbound, within/inside the network as Internal.

The Outbound traffic to the internet can be configured to go out directly from the server or via proxies depending on the traffic type, e.g.

HTTP/HTTPS Proxy for HTTPS and HTTP traffic
SOCKS Proxy for TCP/AMQP traffic

The Inbound traffic can be configured to come through load balancers. BUT important to note the Corda peer-to-peer TCP/AMQP traffic relies on SSL Handshake between peer nodes and own corda node (float). Therefore, the SSL should NOT be terminated at load balancer.

Network Connections Overview

Web Server

From	To	Direction	Protocol
User PC/Browser	Web Server	Inboud / Internal	HTTP/HTTPS
Web Server	Corda Server	Internal	RPC
Web Server	Database Server	Internal	JDBC
Web Server	Mail Server	Internal	SMTP
Web Server	essDocs API EndPoint	Outbound	HTTPS

Corda Node

Without Corda Firewall

From	To	Direction	Protocol
Corda Node	Database Server	Internal	JDBC
Corda Node	Corda Network Doorman	Outbound	HTTPS
Corda Node	Corda Network Network Map	Outbound	HTTPS
Corda Node	Corda Network tlsCertCrlDistrPoint	Outbound	HTTP
Corda Node	Corda Network Notary	Outbound	AMQP
Corda Node	Contour BNO	Inboud & Outbound	AMQP
Corda Node	Peer Contour Nodes	Inboud & Outbound	AMQP

With Corda Firewall

More information on Corda Firewall can be found on Corda Docs.

From	To	Direction	Protocol
Corda Node	Database Server	Internal	JDBC
Bridge & Float	Corda Network Doorman	Outbound	HTTPS
Bridge & Float	Corda Network Network Map	Outbound	HTTPS
Bridge & Float	Corda Network tlsCertCrlDistrPoint	Outbound	HTTP
Bridge	Corda Network Notary	Outbound	AMQP
Bridge	Contour BNO	Outbound	AMQP
Bridge	Peer Contour Nodes	Outbound	AMQP
Float	Corda Network Notary	Inboud	AMQP
Float	Contour BNO	Inboud	AMQP
Float	Peer Contour Nodes	Inboud	AMQP

Connections on Contour Prod

Contour Beta/Prod environment is running on Corda Network Production. There are mainly 4 categories of services/nodes that a self-managed Contour node needs to connect to:

Corda Network (tCN) services: Doorman, Network Map, CRL Distribution Endpoint;
Notary services: Contour uses the Non-validating notary on Corda Network, managed by Corda Network Foundation (CNF);
Contour BNO: Contour Business Network Operator node
Peer Contour Nodes: these nodes can be hosted by Contour Company (Contour Cloud nodes), or by Contour customers themselves (Self-managed nodes).

Corda Network Services

The domain names of tCN services in Contour Production Network are given in the sample node.conf below.

Note: The connection to the CRL Distribution Point as configued in Corda node node.conf is HTTP, instead of HTTPS. Therefore, if HTTP/HTTPS proxy is used, specify the proxy for both HTTPS and HTTP.
- e.g. java -Dhttps.proxyHost=proxy_host -Dhttps.proxyPort=proxy_port -Dhttp.proxyHost=proxy_host -Dhttp.proxyPort=proxy_port -jar corda.jar

# sample `node.conf`

networkServices {
    doormanURL="https://doorman.corda.network/ED5D077E-F970-428B-8091-F7FCBDA06F8C"
    networkMapURL="https://prod-sub0-netmap-01.corda.network/SUB0CHKQ-8GCO-HS3S-KLZC-BINKKAGIMDRS"    
}
tlsCertCrlDistPoint="http://crl.corda.network/nodetls.crl"
tlsCertCrlIssuer="CN=Corda TLS CRL Authority,OU=Corda Network,O=R3 HoldCo LLC,L=New York,C=US"

Notary services

Notary x500 name as configured in contour-cordapps-9.0.0.conf, and the domains (p2pAddresses) of these Highly-available Notary nodes are:

prod-notary-sub0-uks1-01.corda.network
prod-notary-sub0-ukw1-03.corda.network
prod-notary-sub0-euw1-05.corda.network

Note: The notary end point may change hence it's recommended not to do whitelisting.

# Production sample `contour-cordapps-9.0.0.conf`: 

net.corda.businessnetworks.membership.notaryName="CN=Non-validating Prod SUB0 HA Notary, O=R3 HoldCo LLC, L=New York, C=US"

Contour BNO

Contour BNO has domain name under sub-domain of *.app.contournetwork.io.

Peer Contour Nodes (Contour Cloud)

Contour cloud hosted peer nodes have their domain name under sub-domain of *.app.contournetwork.io.

Peer Contour Nodes (Self-managed)

Since these nodes are self-managed by customers. Contour is not able to provide the information.

Connections on Contour Staging