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Full Discussion: Testing connectivity to an URL
Top Forums UNIX for Advanced & Expert Users Testing connectivity to an URL Post 303045332 by anaigini45 on Tuesday 17th of March 2020 04:04:53 AM
Old 03-17-2020
Testing connectivity to an URL
Hi,


I need to access this URL from my laptop :


However, I am not able to. Error received was "Connection was reset".
(Attached image)



My laptop IP is 192.168.8.149, and I do a telnet to confirm the connectivity :


Code:
C:\Users\Owner>telnet 192.168.121.72 8081
Connecting To 192.168.121.72...Could not open connection to the host, on port 8081: Connect failed

C:\Users\Owner>

I do a curl directly from the host that runs the atricore modules :


Code:
[root@amanda-server etc]# curl -Is http://localhost:8081/atricore-console/ | head -1
HTTP/1.1 302 Found

This is the output from ss -tulpn for port 8081 :


Code:
tcp   LISTEN     0      50                                                            [::]:8081                                                                      [::]:*                   users:(("java",pid=11585,fd=339))

Correct me if I am wrong, but I believe the telnet clearly shows that the access to that ip and port is not available, and most probably due to physical firewall connection?
This is because there is no firewalld running within the server itself :


Code:
[root@amanda-server etc]# systemctl status firewalld
- firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:firewalld(1)
[root@amanda-server etc]#

And what does the status HTTP/1.1 302 Found mean from the curl output?
I hope opening the port at the physical firewall level will resolve this problem?
Last edited by anaigini45; 03-17-2020 at 05:11 AM..
 

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LEARN ABOUT CENTOS

firewalld.service

FIREWALLD.SERVICE(5)						 firewalld.service					      FIREWALLD.SERVICE(5)

NAME

       firewalld.service - firewalld service configuration files

SYNOPSIS

       /etc/firewalld/services/service.xml
       /usr/lib/firewalld/services/service.xml

DESCRIPTION

       A firewalld service configuration file provides the information of a service entry for firewalld. The most important configuration options
       are ports, modules and destination addresses.

       This example configuration file shows the structure of an service configuration file:

	   <?xml version="1.0" encoding="utf-8"?>
	   <service>
	     <short>My Service</short>
	     <description>description</description>
	     <port port="137" protocol="tcp"/>
	     <module name="nf_conntrack_netbios_ns"/>
	     <destination ipv4="224.0.0.251" ipv6="ff02::fb"/>
	   </service>

OPTIONS

       The config can contain these tags and attributes. Some of them are mandatory, others optional.

   service
       The mandatory service start and end tag defines the service. This tag can only be used once in a service configuration file. There are
       optional attributes for services:

       version="string"
	   To give the service a version.

   short
       Is an optional start and end tag and is used to give an icmptype a more readable name.

   description
       Is an optional start and end tag to have a description for a icmptype.

   port
       Is an optional empty-element tag and can be used several times to have more than one port entry. All attributes of a port entry are
       mandatory:

       port="string"
	   The port string can be a single port number or a port range portid-portid or also empty to match a protocol only.

       protocol="string"
	   If a port is given, the protocol value can either be tcp or udp. If no port is given, it can be any protocol from /etc/protocols to
	   have a protocol match only.

   module
       Is an optional empty-element tag and can be used several times to enable more than one netfilter kernel helper for the service. A module
       entry has exactly one attribute:

       name="string"
	   Defines the name of the kernel netfilter helper as a string.

   destination
       Is an optional empty-element tag and can be used only once. The destination specifies the destination network as a network IP address
       (optional with /mask), or a plain IP address. The use of hostnames is not recommended, because these will only be resolved at service
       activation and transmitted to the kernel. For more information in this element, please have a look at --destination in iptables(8) and
       ip6tables(8).

       ipv4="address[/mask]"
	   The IPv4 destination address with optional mask.

       ipv6="address[/mask]"
	   The IPv6 destination address with optional mask.

SEE ALSO

       firewall-applet(1), firewalld(1), firewall-cmd(1), firewall-config(1), firewalld.conf(5), firewalld.direct(5), firewalld.icmptype(5),
       firewalld.lockdown-whitelist(5), firewall-offline-cmd(1), firewalld.richlanguage(5), firewalld.service(5), firewalld.zone(5),
       firewalld.zones(5)

NOTES

       firewalld home page at fedorahosted.org:
	   http://fedorahosted.org/firewalld/

       More documentation with examples:
	   http://fedoraproject.org/wiki/FirewallD

AUTHORS

       Thomas Woerner <twoerner@redhat.com>
	   Developer

       Jiri Popelka <jpopelka@redhat.com>
	   Developer

firewalld 0.3.9 													      FIREWALLD.SERVICE(5)
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