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 502 error de proxy a scenario where you have a client workstation behind Forefront TMG 2010 502 proxy error apache and you are trying to download files from a FTP Server. You are successfully able to logon on
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the FTP but after type the command “dir” you get the error message below: The message is pretty clear about what is going on, isn’t it? Well, it is but
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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 this option and apply the changes you should be able to list your files just 502 proxy error reason error reading from remote server 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 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}")
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viewing this topic: none Logged in as: Guest Tree Style Printable Version 502 proxy error chrome All Forums >> [ISA Server 2000 Cache] >> Web Proxy Client >> FTP through ISA Web Proxy - Error http 502 proxy error web service 502 12015 Page: [1] Login Message << Older Topic Newer Topic >> FTP through ISA Web Proxy - Error http 502 12015 - 15.Dec.2003 9:44:00 PM jfisaorg Posts: 5 Joined: 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/ 15.Dec.2003 Status: offline I'm trying to connect to ftp site that requires authentication through isa web proxy without firewall client installed.I always get http 502 error - The login request was denied (12015).Anyone has a idea ?Thanks in advance !Jeff Post #: 1 Featured Links* RE: FTP through ISA Web Proxy - Error http 502 12015 - 19.Dec.2003 2:43:00 AM ronmcdonald Posts: 38 Joined: http://forums.isaserver.org/FTP_through_ISA_Web_Proxy_-_Error_http_502_12015/m_100069700/tm.htm 18.Dec.2003 From: Maryland Status: offline Hi Jeff,I have come across the same issue. I have found this article recently from Microsoft. MSFT Support - KB Article 823261 From what there saying in the article there is a issue with the remote FTP server respond code and how ISA interprets it. Sound like a bug to me.. (in reply to jfisaorg) Post #: 2 RE: FTP through ISA Web Proxy - Error http 502 12015 - 19.Dec.2003 3:13:00 AM ronmcdonald Posts: 38 Joined: 18.Dec.2003 From: Maryland Status: offline I am able to reproduce my issue by going to Linksys FTP Site Hears my error:HTTP 502 Proxy Error - The user name was not allowed. Try a different name, or retry the same name after verifying that it is typed correctly. (12013)Using the CMD prompt I did some investigating to see what type of FTP server or daemon they were using; see results:C:\>ftp ftp.linksys.comConnected to ftp.linksys.com.220---------- Welcome to Pure-FTPd ----------This issue that ISA is having seems more to be with compatibility issues with different FTP servers.. (in reply to jfisaorg) Post #: 3 RE: FTP through ISA Web Proxy - Error http 502
Management Gateway I had the hardest time trying to get one particular site to work from behind a http://fixmyitsystem.com/2011/03/tmg-error-code-502-proxy-error-data-is.html 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: 502 proxy 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 502 proxy error 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 d