diff options
| -rw-r--r-- | documentation/content/en/articles/ipsec-must/_index.adoc | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/documentation/content/en/articles/ipsec-must/_index.adoc b/documentation/content/en/articles/ipsec-must/_index.adoc index 262ffef368..3d5d04f3ed 100644 --- a/documentation/content/en/articles/ipsec-must/_index.adoc +++ b/documentation/content/en/articles/ipsec-must/_index.adoc @@ -52,8 +52,8 @@ toc::[] [[problem]] == The Problem -First, lets assume you have crossref::ipsec-must[ipsec-install, Installing IPsec]. -How do you know it is crossref::ipsec-must[caveat, Caveat]? Sure, your connection will not work if it is misconfigured, and it will work when you finally get it right. +First, lets assume you have crossref:ipsec-must[ipsec-install, Installing IPsec]. +How do you know it is crossref:ipsec-must[caveat, Caveat]? Sure, your connection will not work if it is misconfigured, and it will work when you finally get it right. man:netstat[1] will list it. But can you independently confirm it? [[solution]] @@ -73,14 +73,14 @@ This would be true even if some of the data in "encrypted mode" was not encrypte Ueli Maurer's "Universal Statistical Test for Random Bit Generators"(https://web.archive.org/web/20011115002319/http://www.geocities.com/SiliconValley/Code/4704/universal.pdf[MUST]) quickly measures the entropy of a sample. It uses a compression-like algorithm. -crossref::ipsec-must[code, Maurer's Universal Statistical Test (for block size8 bits)] for a variant which measures successive (~quarter megabyte) chunks of a file. +crossref:ipsec-must[code, Maurer's Universal Statistical Test (for block size8 bits)] for a variant which measures successive (~quarter megabyte) chunks of a file. [[tcpdump]] === Tcpdump We also need a way to capture the raw network data. A program called man:tcpdump[1] lets you do this, if you have enabled the -_Berkeley Packet Filter_ interface in your crossref::ipsec-must[kernel,src/sys/i386/conf/KERNELNAME]. +_Berkeley Packet Filter_ interface in your crossref:ipsec-must[kernel,src/sys/i386/conf/KERNELNAME]. The command: @@ -100,9 +100,9 @@ Here is the experiment: [.procedure] ==== . Open a window to an IPsec host and another window to an insecure host. -. Now start crossref::ipsec-must[tcpdump, Tcpdump]. +. Now start crossref:ipsec-must[tcpdump, Tcpdump]. . In the "secure" window, run the UNIX(R) command man:yes[1], which will stream the `y` character. After a while, stop this. Switch to the insecure window, and repeat. After a while, stop. -. Now run crossref::ipsec-must[code, Maurer's Universal Statistical Test (for block size8 bits)] on the captured packets. You should see something like the following. The important thing to note is that the secure connection has 93% (6.7) of the expected value (7.18), and the "normal" connection has 29% (2.1) of the expected value. +. Now run crossref:ipsec-must[code, Maurer's Universal Statistical Test (for block size8 bits)] on the captured packets. You should see something like the following. The important thing to note is that the secure connection has 93% (6.7) of the expected value (7.18), and the "normal" connection has 29% (2.1) of the expected value. + [source,shell] .... |