# Hello,

**URL:** <https://forum.bluemind.net/t/hello/1649>\
**Category:** Discussions\
**Created:** [January 13, 2014, 7:13pm UTC](https://forum.bluemind.net/t/hello/1649 "2014-01-13T19:13:13Z")\
**Posts on this page:** 2\
**Page:** 2

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**Author:** ![chcllc](https://forum.bluemind.net/letter_avatar_proxy/v4/letter/c/34f0e0/32.png) [@chcllc](https://forum.bluemind.net/u/chcllc)\
**Post date:** [January 29, 2014, 3:35pm UTC](https://forum.bluemind.net/t/hello/1649/21 "2014-01-29T15:35:21Z")

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es1 has wan ip and a lan  
es2, es3 and es4 only have a lan address

es1 can ping es2,3,4 but when the software trys to add them the the server apps it cant find them. the plan i to have es2 do webmail, es3 databae, es4 other

im i looking at this wrong?

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**Author:** ![Toony](https://forum.bluemind.net/letter_avatar_proxy/v4/letter/t/5daacb/32.png) [@Toony](https://forum.bluemind.net/u/Toony)\
**Post date:** [February 3, 2014, 4:41pm UTC](https://forum.bluemind.net/t/hello/1649/22 "2014-02-03T16:41:16Z")

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You need to pre-install some package on server _es2_, _es3_ or _es4_, according what you want to run on them.

At least, _bm-node_ and _bm-conf_ must be installed.

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