In this exercise, you will need to troubleshoot and resolve connectivity issues to a web server.
*This course is not approved or sponsored by Red Hat.*
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Verify Server1.
Verify Server1 is running Apache:
systemctl status httpdVerify Apache is listening on port 80:
ss -lntp | grep 80Verify the content can be accessed locally:
curl localhostVerify the firewall is permitting port 80 traffic:
firewall-cmd --list-allPermit inbound traffic to Apache:
firewall-cmd --permanent --add-service=httpReload the firewall to pickup the change:
firewall-cmd --reload- Verify Server2.
On Server2 (10.0.1.11)
Attempt to pull the web content from Server1 via hostname:
curl ip-10-0-1-10.ec2.internalAttempt to pull the web content from Server1 via IP
curl 10.0.1.10Check to see what DNS hosts are being used:
cat /etc/resolv.confVerify resolution via the specified host:
dig @10.0.0.2 ip-10-0-1-10.ec2.internalVerify
/etc/nsswitch.conf:vim /etc/nsswitch.confAttempt to pull the web content from Server1 via hostname:
curl ip-10-0-1-10.ec2.internalPing
ip-10-0-1-10.ec2.internal:ping ip-10-0-1-10.ec2.internalReview
/etc/hosts:vim /etc/hostsAttempt to pull the web content from Server1 via hostname:
curl ip-10-0-1-10.ec2.internalInstall
elinks:yum install -y elinksUse
elinksto view the content:links -dump http://ip-10-0-1-10.ec2.internal
