• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 6468
  • Last Modified:

Bluecoat Proxy SG Network Error (tcp_error)

I am experiencing some issues with a Bluecoat Proxy SG appliance and could use some guidance. when trying to access a website www.parker.com the access error states Network Error (tcp_error) A communication error occured: "Operation timed out" The Web Server may be down, too busy, or experiencing other problems preventing it from responding to requests. You may wish to try again at a later time.
CheckThe Logs
CheckThe Logs
1 Solution
btanExec ConsultantCommented:
From the error, the packer.com link falls under the business/economy categories which is not allowed under the BC policy. Typically due to DNS entry for the name resolution. You can also "Conduct Network Connectivity Tests" as starter - https://bto.bluecoat.com/webguides/proxysg/62/acceleration/Content/02Tasks/Getting_Started/gs_conduct_network_connectivity_tests_ta.htm

Or otherwise, log into the ProxySG appliance via SSH, and issue the command below
test http get http://url-with-the-issue.xyz

Other useful CLI ("show") include inside listing
  - http://curiousecurity.com/2011/12/15/blue-coat-proxysg-cli-commands/
there maybe time to manually purge the local DNS cache and/or the actual web cache
 - http://blog.michaelfmcnamara.com/2008/10/bluecoat-proxysg-flush-dns-and-cache/

Mostly we are just trying to receive information to identify if the site is having issues, which in this case is not since bypassing SG is alright. So other possible considerations may include your external IP is blacklisted, a firewall upstream (not too likely, but possible), or proxy is looking for authentication, and also the earlier name resolution not successful (which if there is ip address to test for direct connection  which is tough for internet site).
CheckThe LogsAuthor Commented:
btan, thank you for the great ideas and details. I will check on these items and update this post ASAP.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

How do you know if your security is working?

Protecting your business doesn’t have to mean sifting through endless alerts and notifications. With WatchGuard Total Security Suite, you can feel confident that your business is secure, meaning you can get back to the things that have been sitting on your to-do list.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now