Intermittent Paypal IPN Problem

[philbags]

Hi all,

I'm using paypal's IPN facility to update my customer orders. Everything has been working fine for a year or so with virtually error-free performance.

In the last two weeks, I've been getting an intermittent error message below:

Error in: https://my.allaboutstalbans.net/...aspx. Error Message:Error in: https://my.allaboutstalbans.net/...aspx. Error Message:The remote name could not be resolved: 'www.paypal.com'stack trace: at System.Net.HttpWebRequest.GetRequestStream(Transpo rtContext& context)
at System.Net.HttpWebRequest.GetRequestStream()
at PPIPN.MakeHttpPost()
at IPNProcess.Page_Load(Object sender, EventArgs e)
at System.Web.UI.Control.OnLoad(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)source:System

I opened a ticket with Paypal and their response was that some outbound connections from DASP server may be getting blocked in a firewall?

See the correspondence below:


Response Via Email (Robert G) 11/24/2011 05:05 AM
Hello Philip,

Are you possibly filtering outbound connections?
We have recently added ranges of IP address on which www.paypal.com listens. As a result, you may need to update your outbound firewall rules (if any).

The following IP address (ranges) are used for www.paypal.com at present:

------------www.paypal.com------------
66.211.168.65
66.211.168.97
66.211.168.193
66.211.168.209
66.211.169.2
66.211.169.65
64.4.241.16
64.4.241.32
64.4.241.33
64.4.241.34
64.4.241.35
64.4.241.36
64.4.241.37
64.4.241.38
64.4.241.39
64.4.241.49
64.4.241.65
64.4.241.129
216.113.188.32
216.113.188.33
216.113.188.34
216.113.188.35
216.113.188.64
216.113.188.65
216.113.188.66
216.113.188.67
173.0.84.2 (starting April 7, 2011)
173.0.84.34 (starting April 7, 2011)
173.0.88.2 (starting April 7, 2011)
173.0.88.34 (starting April 7, 2011)
66.211.169.14 (starting April 7, 2011)
66.211.169.74 (starting April 7, 2011)
64.4.241.193 (starting April 7, 2011)
64.4.241.225 (starting April 7, 2011)


Sincerely
Robert

Merchant Technical Services
PayPal, an eBay company.

I guess there is no control over firewall settings it being a shared server and all, so any ideas?

Thanks in advance

Philip K

[bruce]

That's a strange error. It indicate that the hostname paypal.com is not being resolved properly. If you see this more consistently, open a support ticket, we can check it out.

The firewall rule should not have caused this error.

[philbags]

Hi all,

To follow up, it seems that this problem is caused by a memory leak somewhere in my application and not related to the error message at all. Shortly before this problem started I implemented an automatic pdf generation routine called from a class which attaches to an email on completion of the IPN process.

[bruce]

Thanks for posting the follow up.