502 Proxy Error Isa Ftp
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2000 Cache] >> Web Proxy Client >> FTP through ISA Web Proxy - Error http 502 12015 Page: [1] Login Message 502 proxy error apache reverse proxy << Older Topic Newer Topic >> FTP through ISA Web Proxy - Error http 502 12015 - 15.Dec.2003 9:44:00 PM jfisaorg Posts: 5 Joined: 15.Dec.2003 Status: offline I'm trying to connect to https://support.microsoft.com/en-us/kb/925880 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: 18.Dec.2003 From: Maryland Status: offline Hi Jeff,I have come across the same http://forums.isaserver.org/FTP_through_ISA_Web_Proxy_-_Error_http_502_12015/m_100069700/tm.htm 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 12015 - 19.Dec.2003 8:57:00 PM spouseele Posts: 12830 Joined: 1.Jun.2001 From: Belgium Status: offline Hi Ron, you need to implement the hotfix mentioned
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 http://www.chicagotech.net/msapps/isa1.htm will be back in business in little time. First, let’s take a look at the definition of 502 http://forum.rebex.net/158/error-502-returned-by-http-proxy 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 502 proxy 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. Don’t 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 502 proxy error is with your ISA/TMG. If not, the problem is with your webserver. Since this post is about ISA and TMG, let’s assume you are able to view the content internally just fine, so we’ll 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 the internal resource’s name to an IP address. Check your internal DNS, or your ISA/TMG’s DNS client configuration. I have oft
We use a HTTP Proxy (NTLM Authentification). following code generates the 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 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 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 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=tprange.AddRange("FTP", 1, 65535) tprange.Save After the script is run and "Microsoft Firewall Service" ("Microsoft ISA Server Control