{"id":6389,"date":"2022-10-31T01:43:06","date_gmt":"2022-10-31T01:43:06","guid":{"rendered":"https:\/\/www.use-snip.com\/kb\/?post_type=ht_kb&p=6389"},"modified":"2022-11-05T23:23:53","modified_gmt":"2022-11-05T23:23:53","slug":"ip-and-port-forwarding","status":"publish","type":"ht_kb","link":"https:\/\/www.use-snip.com\/kb\/knowledge-base\/ip-and-port-forwarding\/","title":{"rendered":"IP and Port Forwarding"},"content":{"rendered":"

This article describes how to set the IP value(s) used in SNIP<\/strong><\/span>. When you set up the NTRIP Caster<\/a> on a host machine, you must enter the network IP that SNIP<\/strong><\/span> will listen on and reply to the NTRIP Clients<\/a> (Rovers) and NTRIP Servers<\/a> (Bases) connection requests on.\u00a0 Often the network IP value that the host machine uses is not the same as the public internet network IP (or DNS\/URL name) that other parties use to reach your caster.\u00a0 These values are all set in this dialog.<\/p>\n

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Often a SNIP<\/strong> <\/span>NTRIP Caster is run on a machine which does not have a static IP address assigned to it.\u00a0 This article reviews three ways to set the link address used in various reports created by SNIP<\/strong><\/span>.\u00a0\u00a0 If your copy of SNIP<\/strong> <\/span>operates behind a firewall, or is using Dynamic DNS (DDNS), or uses a router or DSL modem to connect to the internet, or has a DNS entry rather than just an IP address\u00a0 – then use this dialog to map the public IPs values seen by various public reports in SNIP<\/strong><\/span>.<\/p>\n

The Basics<\/h2>\n

The IP Mapping Setup<\/strong> dialog is reached by pressing the IP Map<\/strong> button found on the Caster and Clients<\/strong><\/em> tab<\/a>.\u00a0\u00a0 The dialog (shown below with representative values – yours will differ) presents a choice of three editable values which will be used by SNIP<\/strong><\/span> in the links found with various reports<\/a> such as the general STATUS<\/a> command.<\/p>\n

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If your SNIP<\/strong><\/span> NTRIP Caster uses a static IP then any reports will already correctly link to the caster.\u00a0 You might still wish to use the Public DNS Name<\/em> option to have those reports use the URL string for your Caster, rather than its IP address.<\/p>\n

If your SNIP<\/strong> <\/span>NTRIP Caster uses IP and\/or port forwarding, you should use either the Public DNS Name<\/em> option (if the the IP has a DNS name registered with it) or the Public IP Address <\/em>option if you prefer to use IP address values.<\/p>\n

Note<\/strong><\/span>: If you have a Pro<\/strong> <\/em><\/span>or Enterprise<\/strong> <\/span><\/em>model of SNIP<\/strong><\/span> and wish to have a machine name registered using one of the SNIP<\/strong><\/span> namespaces (xxx.use-snip.ne<\/em>t or xxx.use-snip.org<\/em> or xxx.use-snip.com <\/em>or xxx.use-snip.co<\/em>), please drop us a note at the normal support email.\u00a0 We reserve the right to handle any name conflicts that may arise as we see fit.<\/p>\n

Note<\/strong><\/span>: If you are using a commercial DDNS service such as ddns.net<\/a> then the periodic registration and maintenance of the machine name is handled by that provider.\u00a0 Simply enter the name you have registered in the IP Mapping Setup<\/strong> dialog.<\/p>\n

In all cases you will also enter the local network card IP in the Machine IP Addres<\/em>s field.\u00a0 This is the actual physical IP of the host machine network card.\u00a0 Many (if not most) deployments do not have a static IP but will use a local ‘non routable’ IP with values like 192,168.x.x or 10.x.x.x or 172.x.x.x.\u00a0\u00a0 If you are using one of these types of values, the traffic that reaches your Caster is either local to the same network, or has been directed to your machine from outside your local network using firewall rules and port forwarding.<\/p>\n

Use of the Controls<\/h2>\n

The selected radio button in the Public IP Mapping Format<\/strong> determines how various reports and links are created in SNIP<\/strong><\/span>.\u00a0\u00a0 Whichever value of the three choices is selected is used in the reports and links.<\/p>\n

Note:\u00a0<\/strong> <\/span>In older versions of SNIP<\/strong> <\/span>(previous to Rev 3.07) there was a master on\/off control for this feature in Public IP Mapping Format<\/strong> as a checkbox.\u00a0 And you could also enter the host machine IP value directly from the Caster and Clients tab.\u00a0 This process has now been simplified so that all IP settings are handled here.\u00a0 In prior versions the ability to use various IP mapping function was limited in the Lite<\/strong> <\/em><\/span>(free) copy of SNIP<\/strong><\/span>, but this limit has now been removed.\u00a0 Now, all models of SNIP<\/strong><\/span> use the same simplified controls.<\/p>\n

The major choice is which of the three format styles is to be used.\u00a0 The values for each choice are enabled for editing when the radio button is selected.\u00a0 Along the right side of the dialog box is a set of test buttons to allow the SNIP<\/strong><\/span> operator to confirm that other parties (on the public internet) can contact and connect to this NTRIP Caster over the public internet using those settings.<\/p>\n

Extensive tool tip hints are also provided and these are shown in the textual window at the bottom of the dialog. When one of the test buttons has been pressed, comments regarding what the user should expect to find are then provided (the results are shown in a separate browser window using the default browser of the machine).<\/p>\n

The use of the three choices is as follows. Much of this text is also repeated in the tool tips.<\/p>\n

Public DNS Name<\/h3>\n

Select this option when either:<\/p>\n