Digi TX54 User Manual page 200

Serial port
iv. (Optional) Click to enable mDNS. mDNS is a protocol that resolves host names in
small networks that do not have a DNS server.
g. Click to expand Telnet connection.
i. Click Enable to allow telnet access to this port.
ii. For Connection type, select one of:
ii. Encrypted connection: The TCP connection uses Transport Layer Security (TLS)
iii. Encrypted connection with authentication: The TCP connection uses TLS
iii. For Port, type or select the appropriate telnet port.
iv. (Optional) Click to expand Access control list to limit access to the telnet connection.
TX54 User Guide
To limit access to specified IPv6 addresses and networks:
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i. Click IPv6 Addresses.
ii. For Add Address, click .
iii. For Address, enter the IPv6 address or network that can access the
device's service-type. Allowed values are:
A single IP address or host name.
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A network designation in CIDR notation, for example, 2001:db8::/48.
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any: No limit to IPv6 addresses that can access the service-type.
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iv. Click  again to list additional IP addresses or networks.
To limit access to hosts connected through a specified interface on the TX54
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device:
i. Click Interfaces.
ii. For Add Interface, click .
iii. For Interface, select the appropriate interface from the dropdown.
iv. Click  again to allow access through additional interfaces.
To limit access based on firewall zones:
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i. Click Zones.
ii. For Add Zone, click .
iii. For Zone, select the appropriate firewall zone from the dropdown.
See Firewall configuration
iv. Click  again to allow access through additional firewall zones.
i. Raw TCP connection: The TCP connection is unencrypted.
encryption.
encryption with authentication.
To limit access to specified IPv4 addresses and networks:
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i. Click IPv4 Addresses.
ii. For Add Address, click .
iii. For Address, enter the IPv4 address or network that can access the
device's service-type. Allowed values are:
for information about firewall zones.
Add a USB serial port
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