TCP error code 10060

by **jdeweerd** » Mon Dec 12, 2011 2:38 pm

I'm connecting to the Esendex API via my .Net application and the connection works fine in any direct connection to the internet I have tried previously. However, I am now running it on a server that has its internet access filtered by Websense and am now generating the following error....

Could not connect to https://www.esendex.com/secure/messenger/soap/SendService.asmx . TCP error code 10060: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 217.158.183.37:443.

I have setup Websense to allow communication on ports 80 & 443 to www.esendex.com/* and I can browse to the https://www.esendex.com/secure/messenger/soap/SendService.asmx link within a browser with no issues, so it seems that the communication is OK in one direction, but not on the return. Is the return traffic coming back on a different port? Any other ideas?