Max packet size (MTU)
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Specify the maximum packet size (range 512- 5146, default: 2600).
A high MTU will increase communication speed and a low MTU may contribute to solving communication problems.
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Optimize for Internet communication
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Select this check box to apply settings (MTU, data compression, etc.) optimized for communicating across the Internet.
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Advanced
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Click this button to display the Advanced TCP/IP Configuration dialog box. See Advanced TCP/IP Configuration.
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IP Broadcast list
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Click this button to display the IP Broadcast List dialog box. See IP Broadcast List.
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General information about Netop TCP/IP
Netop TCP/IP is a UDP based communication device that connects by UDP and optionally communicate by TCP/IP (TCP) during a session.
Each communication profile that uses TCP/IP can support multiple Netop connections.
TCP/IP offers three connect options:
IP address
You can connect by IP address across segmented IP networks including the Internet. The source module port number must match the destination module port number, see Advanced TCP/IP Configuration.
If you connect from outside a network protected by a network address translation (NAT) firewall or proxy server to a Netop module on a network computer, specify the firewall or proxy server public IP address with the port number assigned to the network computer, for example 192.168.20.51:1234.
Ask the firewall or proxy server administrator which port number is assigned to a specific network computer.
Name response
Name response broadcasts a name, the first characters of a name or without a name, requesting Netop modules with a corresponding enabled name to respond. The following name response options are available:
• | If a Guest connects or browses using the Host name qualifier H::, the Host can respond by its enabled Netop Name type name. |
• | If a Guest connects or browses using the Host name qualifier U::, the Host can respond by its enabled LAN User type name. |
• | If a Host requests help, the Guest can respond by its enabled Help service names. |
Note
A broadcast will reach only computers on the local network segment and computers whose IP address or DNS name is specified in the communication profile IP Broadcast List.
Name resolution
Name resolution will resolve a specified name into its corresponding IP address. These name resolution options are available:
• | In the Advanced TCP/IP Configuration dialog box, select the Use Netop Name Server check box and specify the Netop Name Servers to be used. |
Under Program Options > Host Name > Netop Name Server, specify the Name Space ID used by the Netop modules you want to connect to.
Connect by any enabled destination module name, for a Host help request a Guest Help service name.
Netop Name Server will resolve the name into the corresponding IP address and connect by it across segmented IP networks including the Internet. You can also browse for Hosts using Netop Name Server.
• | If a Guest connects by a name using the Host name qualifier DNS::, a domain name server will interpret the name as a DNS name and attempt to resolve it into a corresponding IP address, so the Guest can connect by it across segmented IP networks, including the Internet. |
Note
In most cases, if the Host name qualifier H:: is used, a domain name server will interpret the name as a DNS name and attempt to resolve it into a corresponding IP address.
• | If a Guest connects by a name using the Host name qualifier LDAP::, the Guest will search directory services specified on the Directory Services tab in the Program Options dialog box for a user with this name and connect by the corresponding address attribute, which is typically an IP address. |
You can also browse for Hosts using directory services.
See also
Program Options (Host Name tab)
Connect problems
In case of connect problems, you should first verify that an IP connection is available by from a command prompt by typing:
PING <Netop module IP address>
The PING utility will send four data packets requesting a reply. If you receive replies, an IP connection is available.
If an IP connection is available and connectivity problems persist, consult your network/system administrator or submit a support request to Netop Support.
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