Digi Connect IT 4

Serial port Configure Remote Access mode
Digi Connect IT® 4 User Guide
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iii. Enable TCPkeep-alive messages:
(config)>serial port1 service tcp keepalive true
(config)>
iv. Set the option that initiates the connection:
(config)>serial port1 service tcp conn_type value
(config)>
where value is one of:
n tcp
n tls
n tls_auth
The default is tls.
v. Enable TCP nodelay messages:
(config)>serial port1 service tcp nodelay true
(config)>
vi. (Optional) Configure access control:
n To limit access to specified IPv4 addresses and networks:
(config)> add serial port1 service tcp acl address end value
(config)>
Where value can be:
l A single IP address or host name.
l A network designation in CIDR notation, for example, 192.168.1.0/24.
l any: No limit to IPv4 addresses that can access the service-type.
Repeat this step to list additional IP addresses or networks.
n To limit access to specified IPv6 addresses and networks:
(config)> add serial port1 service tcp acl address6 end value
(config)>
Where value can be:
l A single IP address or host name.
l A network designation in CIDR notation, for example, 2001:db8::/48.
l any: No limit to IPv6 addresses that can access the service-type.
Repeat this step to list additional IP addresses or networks.
n To limit access to hosts connected through a specified interface on the
Connect IT 4 device:
(config)> add serial port1 service tcp acl interface end value
(config)>
Where value is an interface defined on your device.