[FS#523] Problem with FTP (Pure system after upgrade from OpenWRT)

[LEDE Bugs]

The following task has a new comment added:

FS#523 - Problem with FTP (Pure system after upgrade from OpenWRT)
User who did this - Felix Fietkau (nbd)

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It should work if you install kmod-nf-nathelper
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=523#comment1853