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user1447679
Asked: 2016-04-01 09:36:18 +0800 CST

err: CONNECTION_RESET in Chrome on form post, but only from outside network

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I started getting the following error when sending multi-part form posted data via ajax to a service on my website:

net::ERR_CONNECTION_RESET

This only happens when a certain combination of characters are used in the form posted data, and the issue does not happen when I'm accessing the site directly from the server itself.

I'm basically having trouble tracking down the culprit, such as request filter, firewall, etc. I just don't know where to look, and I can't find anything in the logs that relates to it. It seems a combination of parenthesis are causing the issue, but I have no idea why.

I suppose the question is, does anyone have any ideas as to where I can start tracking down this issue?

I know this is fairly vague, but I just need a push in the right direction.

Thanks a ton.

IIS 8.5, Windows Server 2012

iis

2 Answers

  1. since you have mentioned specifically in chrome have checked this ?

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  2. A recent comment reminded me of this question I had some time ago. In my case, the issue was with the hosting provider at a network level. The requests were getting filtered and dropped prior to reaching my server. The content was triggering a security protocol (false-positive).

    So if you run into this issue and can't find a single log in IIS related to it, you have to go up a level.

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