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Use HTTPS for inventory [closed]


I'm trying to inventory my Linux through HTTPS but i can't get it to work.

OS : Redhat 7.5
OCS Server : 2.4.1-1
OCS Agents : 2.4.0-1

I have set up the server by using the RPMs for EL 7 :

- yum install ocsinventory-server
- configure mariadb and httpd
- web acess OK

I have set up some clients :

cat /etc/ocsinventory/ocsinventory-agent.cfg
# Server URL, unconmment if needed
server = https://ocs.mydomain.com/ocsinventory
basevardir = /var/lib/ocsinventory-agent
# Administrative TAG (optional, must be filed before first inventory)
tag = MyTAG
# How to log, can be File,Stderr,Syslog
logger = Stderr
logfile = /var/log/ocsinventory-agent/ocsinventory-agent.log

I started with ssl=0 and got my first issue :

[Wed Aug 22 09:18:14 2018][error] Cannot establish communication : 500 SSL_ca_file /var/lib/ocsinventory-agent/https:__ocs.mydomain.com_ocsinventory/cacert.pem does not exist

I got it working after doing something i found on the web :

openssl s_client -connect ocs.mydomain.com:443 </dev/null > /tmp/cacert
sed -n '/^-----BEGIN CERTIFICATE-----$/,/^-----END CERTIFICATE-----$/p' /tmp/cacert > /var/lib/ocsinventory-agent/https\:__ocs.mydomain.com_ocsinventory/cacert.pem

After that, the computer appeared on the OCS web interface.

Then i tried with ssl=1 and got

[Wed Aug 22 09:18:51 2018][error] Cannot establish communication : 500 Can't connect to ocs.mydomain.com:443

With tcpdump i can see the TLS connection failling :

Something like : Description: Unknown CA

Nothing in the apache logs when i use ssl=1.

Then i generated a proper certificate from my CA, configured httpd to use it and then did the openssl/sed commands again for the cacert.pem and now i got the same error in the log file but in tcpdump i get

Alert (Level: Fatal, Description: Internal Error)

And through strace :

connect(4, {sa_family=AF_INET, sin_port=htons(443), sin_addr=inet_addr("")}, 16) = 0
getpeername(4, {sa_family=AF_INET, sin_port=htons(443), sin_addr=inet_addr("")}, [16]) = 0
fcntl(4, F_GETFL)                       = 0x2 (flags O_RDWR)
fcntl(4, F_SETFL, O_RDWR|O_NONBLOCK)    = 0
write(4, "\26\3\1\2\0\1\0\1\374\3\3,\376\343k\202\303yIa\242@\300\235\tm\16\257x}\357\212"..., 517) = 517
read(4, 0x26cacf0, 7)                   = -1 EAGAIN (Resource temporarily unavailable)

And still nothing in the apache logs.

I can't find any documentation online for the HTTPS/ssl=1 part. Did i missed something somewhere ? Why i don't have better errors lines in the log ?

Optionnal question ; i filter the ouput trafic in my agents and only the tcp/443 is open. Is it normal that the agent can inventory iself through HTTPS URL with ssl=0 ?


closed with the note: error
asked in OCS Inventory NG server for Unix by (120 points)
closed by
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