[TRB501] Low download on Bridge Mode, not on NAT

Networking Solutions
1

Hello guys,

Just bought a TRB501 that I put in bridge mode, I get ~200mbps. If I put it on NAT mode I get ~600mbps. Latest firmware.

I’ve seen similar topics, but never an answer has been posted to resolve this ?(besides updating firmware but it’s already on the latest TRB501_R_00.07.19.4)

Just tried with TRB501_R_00.07.20.3 same issue.

5

Hello,

Our R&D are aware of this issue and are working on a fix - the reason for this issue is that when going into bridge or passthrough mode, the entire traffic goes through our devices firewall, with which our device has to deal with, essentially slowing the speeds down by double or triple.

I’m unable to give you an ETA for when the fix will be released, but expect it in the near future firmware updates.

Regards,
M.

6

From what I’ve seen this issue has been ongoing for years….

Just bought the product, but I should have checked the website before buying this gateway.
NAT works only in the first boot, after that nothing works, I can ping websites but the rest doesn’t work, tried changing MTU but same issue.

For anyone looking to buy this product be aware that bridge/passthrough has limited throughput. Weird for a gateway.

7

Hello,

This shouldn’t be the case, as NAT is the default mode set for the interface - so essentially, what you’re saying is that mobile isn’t functioning properly (although you’re able to ping websites)?

Regards,
M.

8

Yes, I can ping IPs, FQDNs, but webpages don’t open.

I have a OPNsense that gets its ip from TRB501 via DHCP.

It works if I put it in bridge mode, then nat mode. It works only this way.

But if it gets rebooted, it doesn’t work anymore. Can ping IPs, FQDNs, but webpages don’t open.

9

Hello,

Thanks for clarifying. And what if you were to connect directly to the TRB? Is a reboot/change of the used protocol still required, or does it function properly then?

Regards,
M.

10

Yes, still required.
Bridge mode to Nat mode > Works until next reboot

Nat mode to reboot to Nat mode > Doesn’t work

12

Greetings,

For troubleshooting purposes, we will require more sensitive information from your end, such as the troubleshoot file, which may contain passwords, public IP addresses, serial numbers, and such. To avoid leaking this information, we have sent you a form to fill out, which you will receive in your e-mail inbox that you have registered your account with in the forums. In the Ticket ID field of the form, please enter the ID of this thread, which is 17601.

Best Regards,
Justinas

13

Any news ? I responded to the ticket creation mail.

Now I’m having crashes loops on the device :

1593
2026-03-04 02:52:50
Startup
System
Notice
Device startup completed
1592
2026-03-04 02:52:50
Startup
System
Info
Device startup after unexpected shutdown
1591
2026-03-04 02:51:56
Switch Events
Network
Notice
Port link state of port LAN1 (1000 baseT) changed to UP
1590
2026-03-04 02:51:52
Startup
System
Notice
Device startup completed
1589
2026-03-04 02:51:52
Startup
System
Info

Device startup after unexpected shutdown
1588
2026-03-04 02:51:04
Switch Events
Network
Notice
Port link state of port LAN1 (1000 baseT) changed to UP
1587
2026-03-04 02:51:01
Startup
System
Notice
Device startup completed
1586
2026-03-04 02:51:01
Startup
System
Info
Device startup after unexpected shutdown
1585
2026-03-04 02:49:43
Switch Events
Network
Notice
Port link state of port LAN1 (1000 baseT) changed to UP
1584
2026-03-04 02:49:40

14

Greetings,

I have sent you an email. Please reply to it with the necessary information.

Best Regards,
Justinas

15

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