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ftp entering passive mode error South San Francisco, California

the firewall allows only a few well-known port numbers in and denies access to all other ports. Since the FTP protocol uses two connections, a control connection for communicating with the client, and another connection to transfer data, there is twice the probability of getting timed-out by an Left by fiboo on Jul 09, 2014 4:23 AM Your comment: Title: *So what is this about? date: invalid date '2016-10-16' Does chilli get milder with cooking?

Any suggestions on tracking down what ports are needed so that this Passive Mode error disappears? Another solution is to enable the TCP/IP "Keep Alive" feature on the control connection. Some firewalls require that FTP data connections from the server originate from port 20, which is the standard port number for FTP data connections. At least on my router (Netgear), port triggering is opening up ports triggered by an *outgoing* connection, not an incoming which is the case for ftp, but perhaps the DLink is

Hot Network Questions Why did my electrician put metal plates wherever the stud is drilled through? Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Don't know if this is unique to the firewall or if there's something else I'm missing - I'm assuming it's the firewall. Left by Charlesloong on May 07, 2013 9:26 PM # re: The remote server returned an error: 227 Entering Passive Mode In your solution where you say "just Set System.netWebRequest property

If Keep Alive probes are not enabled, a TCP/IP connection is permanently open and available for sending and receiving until it is closed, or reset (for example, when one end's host Atleast I dont think it is. Export The $PATH Variable, Line-By-Line Is there any job that can't be automated? current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list.

Is there a role with more responsibility? I don't think it's the server as I can connect with FileZilla and through the browser, and as far as the firewall I've connected both behind the firewall and completely out In either case, the client user will typically experience a discarded connection that is very frustrating since the client program will just lock up until the connection is considered permanently timed-out. I narrowed down to 20 ports in my range, and used those in my Firewall Rule, and it works fine. –D3vtr0n Apr 19 '11 at 17:46 add a comment| 1 Answer

Why PASV Poses Problems for FTP Servers on Internal Networks [Contents] The other server-side problem that can occur is when a client is trying to access an FTP server on an Why PASV Poses Problems for FTP Servers behind Load-Balancing Routers [Contents] Load-Balancing Routers can allow an administrator to expose a single IP address and delegate connections among multiple identical slave servers. C# Simple way to learn gridview code concept. I recently setup an "automated build server" for my software projects.

a successful one), in Passive mode: And here is the capture when connecting (and failing) using the app, with passive set to true: So as you can see in the failed Solution 1: The network administrator of the server network can configure the firewall to allow in the entire ephemeral port range. Morten Due Jørgensen http://www.mdjnet.dk Top Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending Post Reply Print view 2 posts • Page The general solution for this problem is that the routing device needs to special-case the FTP protocol, and when there is activity on a FTP session's data connection, it must mark

Problems caused by the firewall prematurely timing out a valid FTP session [Contents] Routing devices have long been inappropriately deleting TCP/IP connections that they manage, mostly because they place greater restrictions Does a survey require an ethical approval? November 2013 02:10 The code below is typical of what you will find for doing an FTP upload using C#. In a nutshell, PORT is used to have the server connect to the client, and PASV is used to have the client connect to the server.

I have pulled my hair out over this one. Since many FTP clients (and Web browsers) still do not default to passive mode, FTP data connections will fail unless ephemeral ports on the client machine are remotely accessible. © Copyright Using our PASV example above, when the FTP server replies to the PASV request: Server: 227 Entering Passive Mode (172,16,3,4,204,173) The routing device should rewrite the packet like this, assuming the The first is that there are multiple connections associated with each FTP session, one control connection and one or more data connections.

http://worldipv6launch.org### END SIGNATURE BLOCK ### Top Profile Reply with quote pedey Post subject: Re: 227 Entering Passive Mode, Disconnected.PostPosted: 2013-05-30 16:54 Offline 500 Command not understood Joined: 2013-05-30 16:42 Use passive (PASV) mode from within your FTP client whenever possible. For the Keep Alive feature to work under realistic conditions then, it must be configured to start sending the probes before the routing device's idle time out kicks in. If anyone has any further suggestions, or a fix for my problem, I would be greatly appreciated.

Outside access allows for username/password entry, then disconnects immediately after log entry '227 Entering Passive Mode (x.x.x.x,136,188)'. Please check your configuration file and verify this type nameGhostDocUtil – adding custom pages to your .chm fileGhostDoc solves the age old problem of documentationMVPVM - OverviewPrism (light) for XamarinThe temp Stumped. Commercial FTP Servers Serv-U vs.

Client-side firewalls may deny these connections, so beware. How much interest should I pay on a loan from a friend? I already had a rule allowing a few specific ports I thought the FTP was using....but how can I see which ports I need to enable? ftp scripting powershell ipv4 share|improve Would you like to answer one of these unanswered questions instead?

Why is Snape being the Half-Blood Prince important to the story? When this happens, a client user cannot use PORT because the FTP server cannot connect back to the client program listening ephemeral port number, and a client user cannot use PASV Any suggestions? I've opened the ports that are under passive mode settings.

For example, NcFTPd Server has an option to let you specify an IP address to use for PASV replies rather than the real IP address of the machine. Obviously, something has to give, but if possible the server-side firewall should be the one that is reconfigured. Therefore, all modern FTP clients negotiate with the server on where the data is sent and who initiates the connection. Select it, and take a good look at the PASV options.

Serv-U MFT Serv-U vs. Solution 1: The network administrator of the server network can give each slave server a valid externally accessible IP address. If your FTP server is running on non-standard port N, it is required by the FTP specification that its data connections originate from port N - 1. Client: PORT 192,168,1,2,7,138 The client wants the server to send to port number 1930 on IP address 192.168.1.2.

If the client needs to transfer data, the sever will tell the client:"hi, I opened port XXXX , please connect to me." and then client will initiate the data connection to The server now connects out from port 21 to port 1930 on 192.168.1.2.