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Ftp Error 502 Proxy Error

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trying to list files in a FTP session behind Forefront TMG 2010 ★★★★★★★★★★★★★★★ Yuri Diogenes [MSFT]March 16,

502 Proxy Error. Forefront Tmg Denied The Specified Uniform Resource Locator

201014 0 0 0 Consider a scenario where you have a proxy error chrome client workstation behind Forefront TMG 2010 and you are trying to download files from a FTP how to fix proxy error Server. You are successfully able to logon on the FTP but after type the command “dir” you get the error message below: The message is pretty clear https://support.microsoft.com/en-us/kb/925880 about what is going on, isn’t it? Well, it is but where do I enable this option? I don’t remember having this on ISA!! To address this issue you just need to enable a new option that we have on TMG, this option is located on the FTP Filter properties as shown below: After enabling https://blogs.technet.microsoft.com/yuridiogenes/2010/03/16/error-502-active-ftp-not-allowed-when-trying-to-list-files-in-a-ftp-session-behind-forefront-tmg-2010/ this option and apply the changes you should be able to list your files just fine. It is important to mention that this setting has nothing to do with the FTP Read Only option, that you had in ISA 2004/2006 and still have it on TMG. The FTP Filter when running in read only mode (see figure below) will blocks all commands in the control channel except the following ones: “ABOR, ACCT, CDUP, CWD /0, FEAT, HELP, LANG, LIST, MODE, NLST, NOOP, PASS, PASV, PORT, PWD /0, QUIT, REIN, REST, RETR, SITE, STRU, SYST, TYPE, USER, XDUP, XCWD, XPWD, SMNT” You can customize this list by using the sample script below (from Configuring Add-ins MSDN article),in this example the script configures FTP Access Filter to allow only the USER and PASS commands: Dim root Dim ftpFilter Dim vpSet On Error Resume Next Err.Clear Set root = CreateObject("FPC.Root") ‘ Get the filter's administration object Set ftpFilter = root.GetContainingArray.Extensions.ApplicationFilters("{680A928F-22B3-11d1-B026-0000F87750CB}") If ftpFilter Is No

ISA. How to access an external FTP site that is not anonymous https://techomusings.wordpress.com/2011/07/25/http-502-proxy-error-the-login-request-was-denied/ using Internet Explorer   USUAL SYMPTOMS/ ERRORS: 1)      HTTP 502 http://www.chicagotech.net/msapps/isa1.htm Proxy Error - The login request was denied 2)      Cache access was denied. 3)      "Port: 21 FTP failed connection attempt user: anonymous request: Get ftp://FTPServer/." (this can be seen in live logging.) Please try to pass the credentials in the URL itself proxy error as ftp://username:[email protected] .  For example, if you are trying to access a site testftp.com and the username is Bryant and password is 1234$, then the URL you would need to use would become, ftp://bryant:[email protected]  Issue: Web proxy normally sends anonymous authentication information to an FTP site in the first request. If the 502 proxy error FTP site rejects and closes the connection at the first try, this error is issued. If you monitor the FTP traffic (you could use live logging), you will see a log entry similar to: "Port: 21 FTP failed connection attempt user: anonymous request: Get ftp://FTPServer/." For further information, refer to: http://technet.microsoft.com/en-us/library/bb794745.aspx Like this:Like Loading... Filed under ISA · Tagged with authentication, cache access, denied, FTP, HTTP 502 Proxy Error ← Error message when you use RDP to connect to a Windows Server 2003-based computer that is running Terminal Server and Citrix MetaFrame PresentationServer Leave a Reply Cancel reply Enter your comment here... Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. (LogOut/Change) You are commenting using your Twitter account. (LogOut/Change) You are commenting using your Facebook account. (LogOut/Change) You are commenting using your Google+ account. (LogOut/Change) C

502 Proxy Error Whenever an ISA or TMG server throws a 502 Proxy Error your way, you know you are probably in for a real hurdle. But with a little familiarity with what a 502 error means, and how it can be fixed, you will be back in business in little time. First, lets take a look at the definition of 502 HTTP response code: 502 Bad Gateway The server was acting as a gateway or proxy and received an invalid response from the upstream server. Pay close attention to what that is saying. The proxy (meaning your ISA or TMG server) received an invalid response from the upstream server (implying that the internal webserver that you are publishing!). Unfortunately that is not always the case as ISA and TMG can throw that error when they are unhappy about something that a normal browser would readily accept. They can also throw one of several different kinds of 502 depending on the circumstances. Understanding is critical to a quick resolution. Dont just stop reading at 502, check the rest of the response. Here is how to determine whether the problem is with your ISA/TMG, or on the internal server: 1. Open a browser on the internal network. 2. Access the URL in question. 3. If you can view the content successfully, the problem is with your ISA/TMG. If not, the problem is with your webserver. Since this post is about ISA and TMG, lets assume you are able to view the content internally just fine, so well keep discussing ISA/TMG. 4. Go to your log viewer. In ISA that is Monitoring, or in TMG that is in Logs & Reports. 5. Edit the filter to look at live logs and have the user try again, or filter on the time range to see the error. Add the Filter by criteria for HTTP Status Code, and set it equal to 502. 6. Run the query, and examine the results. Some of the frequent causes of ISA/TMG generating 502s are: A 502 can be thrown by the ISA/TMG when content filtering is enabled and something in the response is being blocked. Disable content filtering and see if you are then able to access the resource. If you are, look at the header in one of the logged errors (in your log, click the more information link on the error) and see what content type is being returned by the published server. Authorize that in your content filter. If you are using ISA/TMG as a client proxy, and the destination server is running on a non-standard port, you can encounter this error. Create an access rule allowing the non-standard ports. 502 Proxy Error. No data record is available. (11004) is generated when the ISA/TMG cannot resolve

 

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