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Martin Hope
astropanic
Asked: 2015-12-21 02:44:59 +0800 CST
  • 0

I have a very hard time to understand how SMTP works.

I've read already:

I know the SMTP server listens on PORT 25 and exchanges commands with the client.

Lets assume I own the domain mydomain.com and have there my own implemented SMTP server running.

Somebody want sent me (for example [email protected]) an email.

On My server I will see traffic like this:

Server Response: 220 mydomain.com SMTP
Client Sending : HELO domain.com
Server Response: 250 Hello domain.com
Client Sending : MAIL FROM: <[email protected]>
Server Response: 250 Ok
Client Sending : RCPT TO: <[email protected]>
Server Response: 250 Ok
Client Sending : DATA
Server Response: 354 End data with <CR><LF>.<CR><LF>
Client Sending : Subject: Example Message
Client Sending : From: [email protected]
Client Sending : To: [email protected]
Client Sending :
Client Sending : Yo,
Client Sending :
Client Sending :   Sending a test message.
Client Sending :
Client Sending :   Later,
Client Sending : Carl
Client Sending : .
Server Response: 250 Ok: queued as 45334
Client Sending : QUIT
Server Response: 221 Bye

So my server has now the array of bytes containing the message somewhere in memory.

Question:

What I should do now with this message ? (assuming the recipient is on my machine - no relaying is needed)

smtp
Martin Hope
astropanic
Asked: 2015-08-12 13:35:52 +0800 CST
  • 3

How I can automate the generation of self signed certificates when I know the domain name ?

This works, but it asks me on the command line prompt certain questions.

How I should change it to ignore the questions and automatically enter the FQDN ?

#! /bin/bash

echo 01 > ca.srl
openssl genrsa -des3 -out ca-key.pem
openssl req -new -x509 -days 365 -key ca-key.pem -out ca.pem

openssl genrsa -des3 -out server-key.pem
openssl req -new -key server-key.pem -out server.csr

openssl x509 -req -days 365 -in server.csr -CA ca.pem -CAkey ca-key.pem -out server-cert.pem

openssl genrsa -des3 -out client-key.pem
openssl req -new -key client-key.pem -out client.csr

echo extendedKeyUsage = clientAuth > extfile.cnf

openssl x509 -req -days 365 -in client.csr -CA ca.pem -CAkey ca-key.pem -out client-cert.pem -extfile extfile.cnf

openssl rsa -in server-key.pem -out server-key.pem
openssl rsa -in client-key.pem -out client-key.pem
ssl
Martin Hope
astropanic
Asked: 2014-12-22 23:26:45 +0800 CST
  • 0

How I can access the jvm section of the node stats API ?

I've read about it in the docs - monitoring individual nodes

I'm doing a call to 

/_nodes/stats?pretty=true

but don't have the jvm section here.

Instead I have this:

{
  "cluster_name" : "foobarbaz",
  "nodes" : {
    "Avlpu1rJSHq4168HrMC5ZQ" : {
      "timestamp" : 1419232511049,
      "name" : "ves09",
      "transport_address" : "inet[/192.168.32.27:9300]",
      "hostname" : "ves09",
      "indices" : {
        "docs" : {
          "count" : 6540067,
          "deleted" : 0
        },
        "store" : {
          "size" : "7.7gb",
          "size_in_bytes" : 8293747163,
          "throttle_time" : "20.4m",
          "throttle_time_in_millis" : 1227493
        },
        "indexing" : {
          "index_total" : 4905059,
          "index_time" : "33.7m",
          "index_time_in_millis" : 2026968,
          "index_current" : 0,
          "delete_total" : 0,
          "delete_time" : "0s",
          "delete_time_in_millis" : 0,
          "delete_current" : 0
        },
        "get" : {
          "total" : 0,
          "get_time" : "0s",
          "time_in_millis" : 0,
          "exists_total" : 0,
          "exists_time" : "0s",
          "exists_time_in_millis" : 0,
          "missing_total" : 0,
          "missing_time" : "0s",
          "missing_time_in_millis" : 0,
          "current" : 0
        },
        "search" : {
          "open_contexts" : 0,
          "query_total" : 27335627,
          "query_time" : "1.5d",
          "query_time_in_millis" : 137058047,
          "query_current" : 0,
          "fetch_total" : 8774008,
          "fetch_time" : "9.9h",
          "fetch_time_in_millis" : 35957388,
          "fetch_current" : 0
        }
      }
    },
    "dcGrstVDScalZ6QyyAr7nw" : {
      "timestamp" : 1419232511036,
      "name" : "ves08",
      "transport_address" : "inet[/192.168.32.24:9300]",
      "hostname" : "ves08",
      "indices" : {
        "docs" : {
          "count" : 6540067,
          "deleted" : 0
        },
        "store" : {
          "size" : "7.7gb",
          "size_in_bytes" : 8292131741,
          "throttle_time" : "22.8m",
          "throttle_time_in_millis" : 1370025
        },
        "indexing" : {
          "index_total" : 4905059,
          "index_time" : "29.3m",
          "index_time_in_millis" : 1763623,
          "index_current" : 0,
          "delete_total" : 0,
          "delete_time" : "0s",
          "delete_time_in_millis" : 0,
          "delete_current" : 0
        },
        "get" : {
          "total" : 0,
          "get_time" : "0s",
          "time_in_millis" : 0,
          "exists_total" : 0,
          "exists_time" : "0s",
          "exists_time_in_millis" : 0,
          "missing_total" : 0,
          "missing_time" : "0s",
          "missing_time_in_millis" : 0,
          "current" : 0
        },
        "search" : {
          "open_contexts" : 0,
          "query_total" : 27403482,
          "query_time" : "1d",
          "query_time_in_millis" : 93573983,
          "query_current" : 0,
          "fetch_total" : 8789753,
          "fetch_time" : "6.5h",
          "fetch_time_in_millis" : 23516893,
          "fetch_current" : 0
        }
      }
    }
  }
}

How I can access the JVM section through the API ?

java
Martin Hope
astropanic
Asked: 2012-05-31 23:51:31 +0800 CST
  • 0

I posted this question on the babushka google group , but I got since 5 days no response. I will try my luck here:

What is the correct way to setup some users with Babushka on a shiny new Debian box ?

I want simply know what is a good practice with this tool.

Let's say I want have a user "foobar", with rvm installed.

I have only the root user on my host, and Babushka is installed.

Should I first create the foobar user manualy and run with him via Babushka my rvm recipe ?

Or should I run babushka as root and let this tool create the user and instal rvm for them ? (I don't want a global rvm install, only for the foobar user)

linux debian configuration
Martin Hope
astropanic
Asked: 2011-03-24 00:49:32 +0800 CST
  • 1

When I clone a repo with git clone https://[email protected]/directory or when I push to it with git push origin master

Git asks me for a password, how I can automatically provide the password, like ssh keys for example ? So that it don't asks me for my password anymore ?

I need this for two reasons:

1)automation, hudson for example

2)I'm too lazy to provide it everytime by myself

Second question (it's related with the first one)

Why they asks sometimes twice for the password ?

security password https webdav git
Martin Hope
astropanic
Asked: 2010-11-26 22:26:47 +0800 CST
  • 2

My apache server runs as user foo.

I have some Rails applications in /home/foo/app1 /home/foo/app2. Each of them has an vhost

<VirtualHost *:80>
    ServerName app1.foobar.com
    ServerAlias www.app1.foobar.com
    DocumentRoot /var/www/html/app1/current/public
    RailsEnv production
    <Directory /var/www/html/app1/current/public>
    AllowOverride all
     Options -MultiViews
    </Directory>
</VirtualHost>

I have a symlink in /var/www/html/app1 :

current -> /home/foo/app1/tmp_20102611

All file permissons are set correctly (user foo group foo), I can go through the filesystem from shell.

SELINUX is disabled

Distro is CentOs 5.5

Which the above symlink I get an 403 and an error entry in error_log

Symbolic link not allowed or link target not accessible:/var/www/html/app1/current

When I symlink my app in the subdir of /var/www/html instead of /home/foo it works.

How I can avoid this error still placing my app in my /home/foo directory ?

apache-2.2 virtualhost symlink centos5