Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Cannot access SSL website when corporate proxy use man-in-the-middle attack to analyze SSL traffic

Alberto's Firefox
Alberto's Firefox
more options

Our company uses a proxy which analyzes SSL traffic on some web sites. This is done via man-in-the-middle attack. The proxy generates a new certificate on the fly that it sends to the client, impersonating a secure server. After upgrading on Firefox 10.0 I always get error: HTTP Error Status: 400 Bad Request after confirmation of security exception.

Our company uses a proxy which analyzes SSL traffic on some web sites. This is done via man-in-the-middle attack. The proxy generates a new certificate on the fly that it sends to the client, impersonating a secure server. After upgrading on Firefox 10.0 I always get error: HTTP Error Status: 400 Bad Request after confirmation of security exception.

Chosen solution

Maybe this is related to bug fixes of the BEAST (Browser Exploit Against SSL/TLS) attack

  • bug 702111 - Servers intolerant to 1/n-1 record splitting. "The connection was reset" (see also comment 60)
Read this answer in context 👍 0

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

Maybe this is related to bug fixes of the BEAST (Browser Exploit Against SSL/TLS) attack

  • bug 702111 - Servers intolerant to 1/n-1 record splitting. "The connection was reset" (see also comment 60)
Alberto's Firefox
Alberto's Firefox Question owner
more options

This does not appear to be the same problem. In bug 702111 the page https://store.toto-dream.com/toto/member/ToHPLogin.do could not be opened. I can open this page without problem and the form is shown. The problem I have seems to be related to proxy which analyze SSL traffic generating a certificate on the fly. Usually in these case Firefox gives a security warning. Before version 10.0 I was able to continue and open the page but now after accepting I got the error: "HTTP Error Status: 400 Bad Request"