Http 502 Error Proxy Ftp
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trying to list files in a FTP session behind Forefront TMG 2010 ★★★★★★★★★★★★★★★ Yuri Diogenes [MSFT]March 16, 201014 0 0 0 Consider a scenario where you have a client workstation
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behind Forefront TMG 2010 and you are trying to download files from a FTP 502 bad gateway meaning Server. You are successfully able to logon on the FTP but after type the command “dir” you get the error
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message below: The message is pretty clear 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 502 proxy error 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 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 please explain this 502 bad gateway error 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 Nothing Then Wscript.Echo "FTP Access Filter ({680A928F-22B3-11D1-B026-0000F87750CB}) is not installed in array." WScript.Quit End If ‘ Get the vendor parameter set containing the filter's configuration. Set vpSet = ftpFilter.VendorParametersSets.Item("{680A928F-22B3-11D1-B026-0000F87750CB}") ‘If this vendor parameters set does not exist, create it. If vpSet Is Nothing Then WScript.Echo "Adding a vendor parameters set ({680A928F-22B3-11D1-B026-0000F87750CB})" Err.Clear Set vpSet = ftpFilter.VendorParametersSets.Add("{680A928F-22B3-11D1-B026-0000F87750CB}",False) ftpFilter.VendorParametersSets.Save End If ‘ Add the required parameter. vpSet.Value("AllowReadCommands") = "USER PASS" vpSet.Save Note: don’t change the defaul
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Networking Cloud and Datacenter Security Virtualization Downloads Updates Service Packs Security Bulletins Windows Update Trials Windows Server 2012 R2 System Center 2012 R2 Microsoft 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/ SQL Server 2014 SP1 Windows 8.1 Enterprise See all trials » Related Sites Microsoft Download Center TechNet Evaluation Center Drivers Windows Sysinternals TechNet Gallery Training Training Expert-led, virtual classes Training Catalog Class Locator Microsoft Virtual Academy Free Windows Server 2012 courses Free Windows 8 courses SQL Server training https://technet.microsoft.com/en-us/library/bb794799.aspx Microsoft Official Courses On-Demand Certifications Certification overview MCSA: Windows 10 Windows Server Certification (MCSE) Private Cloud Certification (MCSE) SQL Server Certification (MCSE) Other resources TechNet Events Second shot for certification Born To Learn blog Find technical communities in your area Support Support options For business For developers For IT professionals For technical support Support offerings More support Microsoft Premier Online TechNet Forums MSDN Forums Security Bulletins & Advisories Not an IT pro? Microsoft Customer Support Microsoft Community Forums United States (English) Sign in Home Library Wiki Learn Gallery Downloads Support Forums Blogs We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. Forefront Threat Management Gateway (TMG) Internet Security and Acceleration (ISA) Server 2006 Operations Operations Troubleshooting HTTP 502: The Uniform Resource Locator (URL) does not use a recognized protocol Troubleshooting HTTP 502: The Uniform Resourc
We use a HTTP Proxy (NTLM Authentification). following code generates the http://forum.rebex.net/158/error-502-returned-by-http-proxy error An unhandled exception of type 'Rebex.Net.FtpException' occurred in Rebex.Net.Ftp.dll Additional information: Error 502 returned by a HTTP proxy (Proxy Error ( The specified Secure Sockets http://fixmyitsystem.com/2011/03/tmg-error-code-502-proxy-error-data-is.html Layer (SSL) port is not allowed. ISA Server is not configured to allow SSL requests from this port. Most Web browsers use port 443 for bad gateway SSL requests. )). Dim client As Ftp = New Ftp client.Proxy.ProxyType = FtpProxyType.HttpConnect client.Proxy.Host = "proxy" client.Proxy.Port = 8080 client.Proxy.UserName = "DOMAIN\USER" client.Proxy.Password = "PASSWORD" client.Connect("FTPSERVER", 21) Any idea's ? Sven Peeters http-proxy faq error-502 proxy ftp Applies to: Rebex FTP/SSL Please log in or register to add a comment. Please log 502 bad gateway in or register to answer this question. 1 Answer 0 votes answered Apr 7, 2010 by Martin Vobr (12,740 points) edited Apr 7, 2010 This is probably caused by the default behavior of Microsoft ISA server, which only allows requests to ports 443 and 563 using its HTTP Connect method. (Primary use of HTTP Connect is to allow SSL connections to HTTPS servers). The Microsoft Knowledge Base article Q283284 addresses this issue. To access FTP sites through ISA server's HTTP proxy, access to all ports must be allowed. FTP's control connection port is 21 by default, but data connections can use virtually any port, because it is assigned by the FTP server. (Although allowing port 21 and ports >1024 should be enough, there might be exceptions.) To allow connections to all ports through the HTTP proxy, following VB script must be run on the ISA server: set isa=CreateObject("FPC.Root") set arraypolicy=isa.Arrays.GetContainingArray.ArrayPolicy set tprange=arraypolicy.WebProxy.TunnelPortRanges set tmp=tpran
Management Gateway I had the hardest time trying to get one particular site to work from behind a TMG 2010 proxy. The users would get. Error Code: 502 Proxy Error. The data is invalid. (13) IP Address: 84.233.1 Date: 17/03/2011 02:34:51 PM [GMT] Server: Source: web filter Thiscorrelatedwith the following log event on the TMG server. Failed Connection Attempt Log type: Web Proxy (Forward) Status: 13 The data is invalid. Rule: Source: Internal (10.36.136.250:35447) Destination: External (84.233147:80) Request: GET http://lc.com/PORTAL/TOPLEVEL.php Filter information: Req ID: 0fdbab91; Compression: client=No, server=Yes, compress rate=0% decompress rate=0% Protocol: http User: anonymous The big problem I had is that this site "worked just fine" from a direct Internet connection. I used HTTP watch to trace the connection to the site. While goign through the STREAM view I noticed the following: The page was hosted on a Red Hat Apache server. (Just because it is at the top of the header) Content Encoding was GZIP The GZIP thing got me because only the one single page was being compressed. When scrolling further down the stream data I saw something strange - after the gzip data segment (green) there was "clear text" again. (Amber) I had not seen this before. This did not look right, maybe that is what TMG was on about. I check that the server would send me an uncompressed version of the page with some TamperData request header manipulation, and thankfully it did. Then I moved onto the TMG to exclude the site form requesting compressed data. Create a computer or computer set object. Open the HTTP compression setting Add the computer object to the exceptions That finally fixed the problem loading that page. GZIP implemented correctly is a fantastic thing - Do it badly and it cause cause issues, That is why I prefer to do all my compression on a reverse proxy TMG. Just goes to show you TMG was correct in dropping non standard or compliant data. Browsers were far more forgiving, this is good for compatibility but bad for standard enforcement. So if you are getting this or a similar issue requesting data from a site, look at the site closely and see if you can spot something. Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest 4 comments: Rod said... Had exactly the same symptoms and this article helped me sort it out. Thanks very much! April 16, 2012 at 7:42 AM Daywalker said... How do I do it for firewall policy? June 20, 2012 at 10:32 AM Anonymous said... thanx so much for your post. had the same problem and could not so