无法访问 CentOS httpd

Question

I have been using Ubuntu, just recently started to work on Centos (CentOS Linux release 7.1.1503 (Core)) running in VMplayer on my desktop (Ubuntu).

• Branch new CentOS installation.
• installed httpd (using "yum")

• for some reason, httpd didn't start automatically, I ran "service httpd start" and it started according to "netstat -antp".

   [root@localhost ~]# netstat -antp Active Internet connections (servers and established) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1161/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1620/master tcp 0 0 10.0.0.19:22 10.0.0.7:20383 ESTABLISHED 2421/sshd: root@pts tcp6 0 0 :::80 :::* LISTEN 2453/httpd tcp6 0 0 :::22 :::* LISTEN 1161/sshd tcp6 0 0 ::1:25 :::* LISTEN 1620/master

• I can access the http server locally ( curl http://localhost within the CentOs command line)

• when I tried access httpd from the host curl http://172.16.13.143/ , it refused the TCP connection. I was able to to ssh into it, it works ok for ssh ssh root@172.16.13.143 .
• I have stopped iptables service iptables stop
• SELinux is turned off according to getenforce command.

I just need to do a quick test on the web interface but I can't. Really need some help. Thanks.

Answer 1

Packages installed on RHEL/CentOS/Fedora systems aren't supposed to start any services automatically (because maybe you're not ready to expose your service to the world until after you've configured it).

Running service httpd start will start the service temporarily, but it won't start next time you boot. You want systemctl enable httpd to enable the service to start automatically when you boot your system.

You could check if the firewall is actually disabled. Run iptables -S to see the current ruleset. The default iptables configuration typically allows only ssh and nothing else.

Update

Your system is probably running firewalld to manage the firewall. Try service firewalld stop .

You can run systemctl disable firewalld to prevent it from starting next time your system boots.

Answer 2

-- CentOS 7

add the following to '/etc/httpd/conf/httpd.conf'

Replace:
Listen 80

With:
Listen 0.0.0.0:80

this will disable ipv6 and enable ipv4

To check this type:

netstat -an | grep -i tcp | grep -i listen

restart apache service

systemctl restart httpd.service

Also, enable firewall to access port 80

firewall-cmd --permanent --add-service=http
firewall-cmd --reload

Answer 3

Did you do a iptables -L to make sure no firewall is running?

Execute following command to make sure no other firewalls is running too

ps -ef

"80" is being listened so something is blocking your connection looks like

Answer 4

In a standard installation, CentOS 7 is set to prevent traffic to Apache.

add the ports to your firewall:

for http:

sudo firewall-cmd --permanent --add-port=80/tcp 

for https:

sudo firewall-cmd --permanent --add-port=443/tcp