7 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Hi All,
I have a strange issue and I am not sure where the problem lies.
I have about six Ubuntu servers on our DMZ two of which were built on 18.04 from scratch the others were upgraded to 18.04 from 16.04.
The servers built from scratch can send emails from the server via sendmail fine, so... (4 Replies)
Discussion started by: dakelly
4 Replies
2. Shell Programming and Scripting
I remote to many DMZ boxes every day to run batch file that allows me to create users. I create users in 17 DMZ boxes every day which takes a lot of my time.
Is there any script that would do this job from my local computer?
Thank you for your help! (3 Replies)
Discussion started by: idiazza
3 Replies
3. Cybersecurity
Hi, I am new here. Nice to meet you guys :)
Here is my first question:
We are using Fortigate 3800 as firewalls. The DMZ contains external DNS, web and proxy servers. Systems in DMZ use subnet 192.168.1.0, and the internal systems use subnet 10.1.1.0.
My questions: Can we assign two... (3 Replies)
Discussion started by: aixlover
3 Replies
4. Shell Programming and Scripting
Hi
I would like write a script that will do sftp frm a box that resides inside the FW to a box that resides in DMZ.Any ideas guys.I tried generating rsa keys for a particular user, however just want to know is there any other solution or not. Your help is much appreciated.
Thanks
CK (2 Replies)
Discussion started by: coolkid
2 Replies
5. Solaris
I've been looking at various articles about Zones/Containers, from SUN's website, and through numerous Google searches, and although there's a lot of info out there, I've not got a definitive answer for what I'd like to do.....so here we go.....
I'm installing a webserver, which is sitting on a... (3 Replies)
Discussion started by: in2deep
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6. UNIX for Advanced & Expert Users
I'd just like to know what you use for user account management on your DMZ servers?
Do you use the same authentication realm as internally?
Do you use a different authentication realm, perhaps only for the DMZ?
Do you use local accounts? (2 Replies)
Discussion started by: humbletech99
2 Replies
7. Linux
Hi to all.
There are eth0(wan) eth1(lan) and eth3(dmz) in my debian router.
In dmz is planing dns, ad, dhcp, smtp/pop/imap, https(web-based imap client). I don't configured rules on "iptables" and "route" loads for right relation lan clients with dmz services.
Please explain me example... (0 Replies)
Discussion started by: sotich82
0 Replies
LEARN ABOUT CENTOS
firewalld.zones
FIREWALLD.ZONES(5) firewalld.zones FIREWALLD.ZONES(5)
NAME
firewalld.zones - firewalld zones
DESCRIPTION
What is a zone?
A network zone defines the level of trust for network connections. This is a one to many relation, which means that a connection can only
be part of one zone, but a zone can be used for many network connections.
The zone defines the firewall features that are enabled in this zone:
Predefined services
A service is a combination of port and/or protocol entries. Optionally netfilter helper modules can be added and also a IPv4 and IPv6
destination address.
Ports and protocols
Definition of tcp or udp ports, where ports can be a single port or a port range.
ICMP blocks
Blocks selected Internet Control Message Protocol (ICMP) messages. These messages are either information requests or created as a reply
to information requests or in error conditions.
Masquerading
The addresses of a private network are mapped to and hidden behind a public IP address. This is a form of address translation.
Forward ports
A forward port is either mapped to the same port on another host or to another port on the same host or to another port on another
host.
Rich language rules
The rich language extends the elements (service, port, icmp-block, masquerade and forward-port) with additional source and destination
addresses, logging, actions and limits for logs and actions. It can also be used for host or network white and black listing (for more
information, please have a look at firewalld.richlanguage(5)).
For more information on the zone file format, please have a look at firewalld.zone(5).
Which zones are available?
Here are the zones provided by firewalld sorted according to the default trust level of the zones from untrusted to trusted:
drop
Any incoming network packets are dropped, there is no reply. Only outgoing network connections are possible.
block
Any incoming network connections are rejected with an icmp-host-prohibited message for IPv4 and icmp6-adm-prohibited for IPv6. Only
network connections initiated within this system are possible.
public
For use in public areas. You do not trust the other computers on networks to not harm your computer. Only selected incoming connections
are accepted.
external
For use on external networks with masquerading enabled especially for routers. You do not trust the other computers on networks to not
harm your computer. Only selected incoming connections are accepted.
dmz
For computers in your demilitarized zone that are publicly-accessible with limited access to your internal network. Only selected
incoming connections are accepted.
work
For use in work areas. You mostly trust the other computers on networks to not harm your computer. Only selected incoming connections
are accepted.
home
For use in home areas. You mostly trust the other computers on networks to not harm your computer. Only selected incoming connections
are accepted.
internal
For use on internal networks. You mostly trust the other computers on the networks to not harm your computer. Only selected incoming
connections are accepted.
trusted
All network connections are accepted.
Which zone should be used?
A public WIFI network connection for example should be mainly untrusted, a wired home network connection should be fairly trusted. Select
the zone that best matches the network you are using.
How to configure or add zones?
To configure or add zones you can either use one of the firewalld interfaces to handle and change the configuration: These are the
graphical configuration tool firewall-config, the command line tool firewall-cmd or the D-BUS interface. Or you can create or copy a zone
file in one of the configuration directories. /usr/lib/firewalld/zones is used for default and fallback configurations and
/etc/firewalld/zones is used for user created and customized configuration files.
How to set or change a zone for a connection?
The zone is stored into the ifcfg of the connection with ZONE=option. If the option is missing or empty, the default zone set in firewalld
is used.
If the connection is controlled by NetworkManager, you can also use nm-connection-editor to change the zone.
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.ZONES(5)