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Libraries: If you want this lab, consider one of these libraries.
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Testing a Connection
In this hands-on lab, you will need to troubleshoot connectivity issues between `Client1` (10.0.1.11) and `Server1` (10.0.1.10). You will need to determine why the website at 10.0.1.10 is unreachable, and prep the host to make sure connectivity is in place to permit SSL traffic once it's configured.

Lab Info
Table of Contents
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Challenge
Confirm the problem.
On Client1 (10.0.1.11)
Confirm that the problem exists by curling the headers of 10.0.1.10 from 10.0.1.11:
curl -I 10.0.1.10
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Challenge
Confirm, and maybe resolve, Apache's status.
On Server1 (10.0.1.10):
Verify a service is listening on port 80:
ss -lntp | grep :80
If nothing is listening, check if Apache is running:
systemctl status httpd
Start Apache if necessary:
systemctl start httpd
Did that resolve the problem?
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Challenge
Check firewall rules.
On Server1 (10.0.1.10):
Verify that the firewall is configured to permit http traffic:
firewall-cmd --list-services
If
http
isn't present, it will need to be added:firewall-cmd --permanent --add-service=http
And the firewall rules will need to be reloaded to take effect:
firewall-cmd --reload
Verify that the problem is resolved.
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Challenge
Permit https traffic in the firewall and verify.
On Server1 (10.0.1.10):
You will need to open port 443 in the firewall. You can do it with:
# firewall-cmd --permanent --add-service=https
And then reloading the firewall config with this:
# firewall-cmd --reload
You will need to facilitate listening on port 443 from
Server1
(10.0.1.10). You can do this by installing thenmap-ncat
package for CentOS:# yum install nmap-ncat
And then using it to listen on port 443:
# nc -l -p 443
On Client1 (10.0.1.11):
Install telnet:
$ yum install -y telnet
You can verify that 443 is accessible by using telnet:
$ telnet 10.0.1.10 443
About the author
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