TL-ER6120 problems with NAT

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TL-ER6120 problems with NAT

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TL-ER6120 problems with NAT
TL-ER6120 problems with NAT
2019-10-16 02:39:04 - last edited 2021-04-19 11:50:12
Model: TL-ER6120  
Hardware Version: V3
Firmware Version: 20180724

We have now tried 3 of this version after deploying 18 of the V2 routers and we find that we cannot fully perform one-to-one NAT from multiple incoming ip's to sub routers. It almostworks but some protocols are not passed through for example VPN and RSYNC.  Our second deploymentt of a V3 was worse we could not get NAt transversal for Voice packets.  SIP G711a Packets were not passed through correclty we have exactly the same setup for voice SIP in a V2 6120 and all is good. However with same settings the V3 drops incoming voice?  We have had to stop using this popluar router as it just isn't working for us we have 3 now that have to be replaced and I've asked if I can have V2 routers but they are now it seems unavailable.  this is disappointing as we loved this router.  Now not so much.

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Re:TL-ER6120 problems with NAT
2019-10-17 03:03:48 - last edited 2021-04-19 11:50:12
About the port forwarding for one-to-one NAT, can try to enable DMZ on one-to-one NAT. If need to use port forwarding for other devices which did not use one-to-one NAT, virtual server should work. Maybe you can try to contact TP-LINK support for help. As I know, ER6120 v2 and v3 should be similar.
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