A TCP connection was reset by the exception troubleshooting

Yesterday, the dev staff found me said online access to the external network of an interface, access is normal, but in the test environment when not through, very strange, I am also very curious, follow-up troubleshooting, the situation is probably as follows:

test machine: L-qta20.h.beta.cn0

To access the address of the external network interface: Http://xxx.xxx.xxx.xxx:7701/AboutMember.asmx

Here are the following in the test environment when the test environment is not available, use tcpdump to grab the package.

650) this.width=650; "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/ Images/localimage.png ") no-repeat center;border:1px solid #ddd;" alt= "Spacer.gif"/>

650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M00/79/51/wKioL1aOKBWDO11fAACyiNr0jrc086.png "style=" float: none; "title=" Ziliao1.png "alt=" Wkiol1aokbwdo11faacyinr0jrc086.png "/>

650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M01/79/53/wKiom1aOJ-3gvlJWAAAaGE_UVq8119.png "style=" float: none; "title=" Ziliao2.png "alt=" Wkiom1aoj-3gvljwaaaage_uvq8119.png "/>

650) this.width=650; "src="/e/u261/themes/default/images/spacer.gif "style=" Background:url ("/e/u261/lang/zh-cn/ Images/localimage.png ") no-repeat center;border:1px solid #ddd;" alt= "Spacer.gif"/>

Contains the following:

1. The TCP three handshake is complete

2. And the connection is in the state of the data transfer

3. Post data submitted in the past, was reset by the other side

It can be judged that the problem occurs in the other side of the interface:

Beginning to think that the other Web site connection is full, but after troubleshooting, the number of connections there is still a large surplus, so eliminate this problem.

Then think of the white list problem, after checking the whitelist, the other side found in the firewall there is a forwarding rule configuration problem, the other side after modifying the firewall forwarding rules to solve the problem.

This article is from the "Original Python publishing area" blog, so be sure to keep this source http://cuihailong.blog.51cto.com/2923450/1732606

A TCP connection was reset by the exception troubleshooting