Integrating FortiOS (Fortigate VM64/VM32) into GNS3
We work a lot with fortigates so though it would be good to try and use their VM Firmware and integrate it with GNS3, I have used VmwareFive Essential OpenSSL Troubleshooting Commands
Troubleshooting SSL certificates and connections? Here are five handy openssl commands that every network engineer should be able to use. Bookmark this – you never know when it will come in handy!
1. Check the Connection
openssl s_client -showcerts -connect www.microsoft.com:443
This command opens an SSL connection to the specified site and displays the entire certificate chain as well. Here’s an abridged version of the sample output:
MBP$ openssl s_client -showcerts -connect www.microsoft.com:443
CONNECTED(00000003)
depth=2 /C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006
VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3 Public
Primary Certification Authority - G5
verify error:num=20:unable to get local issuer certificate
verify return:0
---
Certificate chain
0 s:/1.3.6.1.4.1.311.60.2.1.3=US/1.3.6.1.4.1.311.60.2.1.2=
Washington/businessCategory=Private Organization/
serialNumber=600413485/C=US/postalCode=98052/ST=Washington/
L=Redmond/street=1 Microsoft Way/O=Microsoft Corporation/
OU=MSCOM/CN=www.microsoft.com
i:/C=US/O=Symantec Corporation/OU=Symantec Trust Network/
CN=Symantec Class 3 EV SSL CA - G3
-----BEGIN CERTIFICATE-----
[...]
-----END CERTIFICATE-----
1 s:/C=US/O=Symantec Corporation/OU=Symantec Trust Network/
CN=Symantec Class 3 EV SSL CA - G3
i:/C=US/O=VeriSign, Inc./OU=VeriSign Trust Network/OU=(c) 2006
VeriSign, Inc. - For authorized use only/CN=VeriSign Class 3
Public Primary Certification Authority - G5
-----BEGIN CERTIFICATE-----
[...]
Continue readingWhat’s in my toolbag – Update 3 – Airconsole
Continuing on with the “What’s in my toolbag” series ( Original Post – Update 1 – Update 2 ) this week we will discuss a handy tool called Airconsole from Get Console. There are 3 models of the Airconsole 2.0 – Standard, Pro, and XL. The Standard and Pro (this is the one I own) are […]
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Act!
Part 1: Getting Inside the Loop
Part 2: Orientation
Part 3: Decide!
Once you’ve observed, oriented, and decided, it’s time to act. This might seem like a minor concept, but it’s actually really, really hard to act in a lot of situations. There are two elements here — the first is our willing suspension of belief, and the second is the doubt storm. Let’s talk about these two.
The willing suspension of belief. To find an example here, I’m going to fall back on my training in self defense. When you first find yourself in any situation that is “bad,” your first line of thought is going to be “this isn’t really happening,” or “why would this person want to hurt me?” In the same way, when your network is failing or under attack, the easiest thing in the world is to disregard the loop, roll over, and go back to sleep. Why would anyone attack my network? Why would this bug be hitting my control plane? Like Scrooge faced with a ghost, we say, “there’s more gravy than grave about you.” And this is a grave mistake. There’s a reason you’ve gone through all the trouble of Continue reading