Dopus 10 cannot connect to any FTP site

Is your machine directly on the internet or behind NAT?

Is the server you're connecting to on the internet or on a LAN or WAN?

In the other FTP clients that work, are they using passive mode or not? (Or do they work in either mode?)

Any FTP proxy configured in either Opus or the other programs?

Does connecting to ftp.demon.nl work?

Is your machine directly on the internet or behind NAT?

Direct

Is the server you're connecting to on the internet or on a LAN or WAN?

LAN

In the other FTP clients that work, are they using passive mode or not? (Or do they work in either mode?)

They are not using passive. DOpus 9 settings are identical of course, and that version works ok!!!!!!!!!!!!!!

Any FTP proxy configured in either Opus or the other programs?

Nope.

Does connecting to ftp.demon.nl work?

"Invalid server name or address"

[quote="timns"]Does connecting to ftp.demon.nl work?

"Invalid server name or address"[/quote]

Can you connect to that from any other FTP clients on the same machine?

Seems odd if you're directly on the internet but a DNS lookup on ftp.demon.nl fails.

[quote="leo"][quote="timns"]Does connecting to ftp.demon.nl work?

"Invalid server name or address"[/quote]

Can you connect to that from any other FTP clients on the same machine?

Seems odd if you're directly on the internet but a DNS lookup on ftp.demon.nl fails.[/quote]

Maybe I typed it wrong.

But anyway: thank you, everyone, for all the help. I am now completely convinced that it's a bug in DOpus 10. I am able to cause the bug at will, ONLY with D10, by activating / deactivating my VPN. No other FTP client suffers with the same problem. I can do this on 2 different machines.

So, to summarise: with VPN 'on' any Active connections I try to make go out from the correct ip address (192.168.x.x) but D10 issues a port command for my VPN ip (10.0.x.x).

If I disable my VPN, the PORT command magically changes to 192,168,x,x,x,x

Again, I stress that no other ftp client has a problem with IDENTICAL connections, including DOpus 9, who's ftp config I imported!!!!!

It's

a

BUG

Don't read this wrong. I love DOpus, used it for years, rely on it very very heavily throughout my day. But that sort of makes it worse when I find something that interrupts my flow.

I can live with it - I have a workaround in place, but oh boy I would love to have this fixed. GP support has been in touch, so kudos for that :thumbsup:

Not saying it isn't a bug; just trying to understand what's happening so I might be able to reproduce it and/or understand what's going wrong. I have multiple VPNs here but have never had the problem, but if I can understand how to configure my system more like yours I can try to reproduce what you're seeing.

If GPSoft support are on the case I'll leave it to them.

FWIW I had a look at the FTP code and I couldn't see any difference between 9 and 10 in how it determined your external IP. I'm not familiar with that code, though, so I was quite possibly looking in the wrong place. :slight_smile: I'll leave it to the FTP experts.

(It could also be that Opus needs an override to let you explicitly specify the local IP for a given site, a but like mIRC tries to auto-detect your external IP but lets you override it if it gets it wrong for some reason.)

[quote="leo"]

(It could also be that Opus needs an override to let you explicitly specify the local IP for a given site, a but like mIRC tries to auto-detect your external IP but lets you override it if it gets it wrong for some reason.)[/quote]

Yes, I bet that would do it. How I got it working at the moment is to use a secure connection so it goes out over another port. That seems to crack it. Just lucky I have SSH set up on the destination machines I need to get onto.

As far as I can see there's nothing special about my VPN. It's a standard Windows set up, activated a few minutes after my PC's boot up.

Lets see what Jon comes back with - I'm sure he'll crack it for me. Hope so - I'm trying to get everyone here to standardize on DOpus and I don't want to end up looking like (more of) a twat. :laughing:

Hi all,

I had also problems with Dopus 10 FTP, and the passive mode proposed by greg cured it.

In ACTIVE mode, I found something strange: Dopus sends a port cmd by using the IP address of my loopback network adapter, which is per se not reachable from outside, right? Well, I'm not a specialist of IP routing. But I opened the NIC list (4 adapters), and looked at the magic advanced settings (menu): My loopback adapter was at top position of binding order ! And it has of course several fixed IP addresses. As soon as I put my real NIC on top, FTP ran even in active mode. Could this explain some of the troubles?

(Win 2008 R2, DSL router/switch at home, Dopus 4185.x86)

Interesting. Opus essentially just asks the system for a port so what you say is interesting. I don't think there's a lot we can do here but please contact me via direct email and I maybe able to run some tests with m ore information.