# \#eth0

**URL:** https://forums.digi.com/tag/eth0/3208.md

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## [WR21 cannot negotiate IPSec on PPP1](https://forums.digi.com/t/wr21-cannot-negotiate-ipsec-on-ppp1/22051)

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**Author:** [@jserink](https://forums.digi.com/u/jserink)\
**Replies:** 2\
**Last updated:** [December 16, 2020, 7:59am UTC](https://forums.digi.com/t/wr21-cannot-negotiate-ipsec-on-ppp1/22051 "2020-12-16T07:59:27Z")

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Hello: WR21 setup according to AN41. Here is the problem. Telco Fiber optic router plugged into Eth0. Its not working so the router switches to PPP1, the PPP1 link comes up. I can ping my VPN res-ponder via the “execu…

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## [Why Connect Core 6 in android fails to open eth0? using a FTPClient and UDP Server android app.](https://forums.digi.com/t/why-connect-core-6-in-android-fails-to-open-eth0-using-a-ftpclient-and-udp-server-android-app/17754)

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**Author:** [@obedbardales](https://forums.digi.com/u/obedbardales)\
**Replies:** 2\
**Last updated:** [December 2, 2016, 8:44am UTC](https://forums.digi.com/t/why-connect-core-6-in-android-fails-to-open-eth0-using-a-ftpclient-and-udp-server-android-app/17754 "2016-12-02T08:44:57Z")

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The android ftp client can connect only when using wlan0. E.g. Connecting to a web hosted ftp server. However when using the eth0 (LAN interface) android doesn’t see any connectivity I.e can’t find the eth0 interface. …