# How to access OPC XML-DA server in Ignition SCADA software? **URL:** \ **Category:** Ignition\ **Created:** [April 23, 2018, 2:33pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808 "2018-04-23T14:33:25Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![hughmeng](https://avatars.discourse-cdn.com/v4/letter/h/2bfe46/32.png) [@hughmeng](https://forum.inductiveautomation.com/u/hughmeng)\ **Post date:** [April 23, 2018, 2:33pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/1 "2018-04-23T14:33:25Z")
Hi, It is my first time to develop a SCADA software. There is an OPC XML-DA server in the project. I found a Web Service module, which is provided by Sepasoft, a partner of Ignition. [https://www.sepasoft.com/web-services/](https://www.sepasoft.com/web-services/) Could you please let me know if it works or not? I really appreciate it if you like to recommend other OPC servers which work well in your experience. Thanks, Wayne ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 23, 2018, 3:21pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/2 "2018-04-23T15:21:52Z")
No, XML-DA is a specific (old) OPC protocol, not some generic web-related thing. Ignition doesn’t support OPC XML-DA, so you’ll need either some kind of “tunneler” product that can convert it to OPC Classic (DA) or OPC UA or a different server altogether. When we don’t have a particular driver Kepware is a recommended alternative OPC UA server. ---
**Author:** ![hughmeng](https://avatars.discourse-cdn.com/v4/letter/h/2bfe46/32.png) [@hughmeng](https://forum.inductiveautomation.com/u/hughmeng)\ **Post date:** [April 23, 2018, 3:33pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/3 "2018-04-23T15:33:43Z")
Hi Kevin, Thank you very much! Do you have any suggestions if I try to build such an OPC-UA driver module based on those APIs you provide? Wayne ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 23, 2018, 3:34pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/4 "2018-04-23T15:34:34Z")
> [@hughmeng](#): > > Do you have any suggestions if I try to build such an OPC-UA driver module based on those APIs you provide? Well... I generally wouldn't recommend it unless you have no alternative (and a lot of programming experience). ---
**Author:** ![hughmeng](https://avatars.discourse-cdn.com/v4/letter/h/2bfe46/32.png) [@hughmeng](https://forum.inductiveautomation.com/u/hughmeng)\ **Post date:** [April 23, 2018, 3:44pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/5 "2018-04-23T15:44:22Z")
Thanks Kevin for your prompt feedback! We will evaluate these options and then make a decision. ---
**Author:** ![hughmeng](https://avatars.discourse-cdn.com/v4/letter/h/2bfe46/32.png) [@hughmeng](https://forum.inductiveautomation.com/u/hughmeng)\ **Post date:** [April 24, 2018, 11:54am UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/6 "2018-04-24T11:54:58Z")
Hi Kevin, I found Kepware OPC server only works for Windows, but we need one for Linux. Do you have any suggestions about it? Thanks, Wayne ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 24, 2018, 12:17pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/7 "2018-04-24T12:17:54Z")
I’m not aware of any other OPC servers that work on Linux. ---
**Author:** ![Sanderd17](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sanderd17/32/8735_2.png) [@Sanderd17](https://forum.inductiveautomation.com/u/Sanderd17)\ **Post date:** [April 24, 2018, 12:39pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/8 "2018-04-24T12:39:00Z")
OPC-DA uses the Windows Active Domains for security. So it’s hard to find something for this on Linux. Even ignoring that XML part. ---
**Author:** ![AlThePal](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/althepal/32/3603_2.png) [@AlThePal](https://forum.inductiveautomation.com/u/AlThePal)\ **Post date:** [April 24, 2018, 12:50pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/9 "2018-04-24T12:50:51Z")
I find it a source of great irony that the infrastructure part of a project, the bit you want to be most reliable, depends on Windows instead of Linux… ---
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [April 24, 2018, 1:27pm UTC](https://forum.inductiveautomation.com/t/how-to-access-opc-xml-da-server-in-ignition-scada-software/17808/10 "2018-04-24T13:27:44Z")
> [@AlThePal](#): > > depends on Windows instead of Linux That's the number one reason I wrote an Ignition driver. Ignition is the only real player in non-Windows OPC/UA that actually has drivers.