Cannot enter passive mode: SYN_SENT

[randich]

Hello,

With version 2 I can connect to my FTP servers in passive mode.

With version 3, when trying to enter passive mode, the TCP socket remains in SYN_SENT mode forever.

I'm attaching the FTP log generated by both versions of Beyond Compare and the TCP socket examined with TCPView.

It's a pity...

[Aaron]

Could you send in your BC2's BC Support.zip and BC3's BC Settings.zip (both from the Help menu -> Support; Export) to [email protected] ?

For troubleshooting, if you alter different BC3 settings in the FTP Profile, such as the different LIST options, does that help?

[randich]

Cannot enter passive mode: SYN_SENT

Thank you, but I've tried from another machine (in other network) and it works fine. Apparently, the problem is with our router/firewall.

Nevertheless, the problem is very weird; for exmaple, only some programs work OK, others not. Seems like FTP libraries behave different from each other:

Beyond Compare 2 -> OK
Beyond Compare 3 -> DOESN'T WORK
CuteFTP 2.8 -> OK
CuteFTP 8 -> DOESN'T WORK
Altap Salamander -> DOESN'T WORK
Directory Opus -> OK

I had the hope of version 3 of BC work
Any clue?

[Zoë]

The only obvious thing I can think of is if you're using a software-based firewall that needs to be configured to allow specific applications through.

You can also try switching the FTP library in BC2. In the Options dialog on the FTP->Advanced panel, switch from "SmartFTP" to "Indy 9". We're only using Indy v10 for BC3.

[randich]

Thank you. I've done the test.

Indy 9 -> DOESN'T WORK
SmartFTP -> OK

Still applies the software-based firewall theory?