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by nmrdukeman
2020/09/23 19:48:12
Forum: CentOS 8 - Networking Support
Topic: Network Interface Configuration
Replies: 1
Views: 123

Network Interface Configuration

Hi, I have two Centos computers : A and B. Each has a static IP address assigned on the network card (eth0). Recently, I put another network card on A, and called it eth1. I want to use eth0 on A for LAN, and to connect eth1 on A to eth0 on B through a cross-over cable. Question: Can I use same stat...
by nmrdukeman
2020/09/21 13:31:47
Forum: CentOS 7 - General Support
Topic: User Log on
Replies: 0
Views: 66

User Log on

Hi,
I got the following message on the screen:
"User(Name) is logged in on seat 0".

I am just curious what is the cause of it.

Thanks.
by nmrdukeman
2020/09/18 13:11:05
Forum: CentOS 8 - General Support
Topic: Centos 7 to 8
Replies: 2
Views: 181

Centos 7 to 8

Hi, I have tried to upgrade to Centos 8 from Centos 7 by following someone's posted procedures on web. When I got to rpm -e `rpm -e kernel` I got the following messages and could not move on to the next step: error: Failed dependencies: kernel >= 3.10.0-384.el7 is needed by (installed) hypervvssd-0-...
by nmrdukeman
2020/08/28 14:04:30
Forum: CentOS 8 - Networking Support
Topic: Connection between Centos 7 and Centos 8
Replies: 2
Views: 98

Connection between Centos 7 and Centos 8

Hi, I am going to connect two PCs with a cross-over cable. It seems to me that, based on the information on internet, one of the PC's IP needs to be DHCP. Can I connect them and communicate with static IP addresses on both? I supposed it should not be difficult at all. Can someone point me to the ri...
by nmrdukeman
2020/08/26 18:23:50
Forum: CentOS 8 - General Support
Topic: Centos 7 to 8
Replies: 2
Views: 175

Centos 7 to 8

Hi,
Just curious when one upgrades from Centos 7 to 8, can all the softwares installed in 7 run in 8?
by nmrdukeman
2020/08/19 14:39:22
Forum: CentOS 8 - Networking Support
Topic: Firewalld IP Addresses
Replies: 3
Views: 163

Re: Firewalld IP Addresses

Hi,
Thanks for the reply.
I used to use TCP wrapper hosts.allow and hosts.deny to limit IP address access on ssh. I tried it on Centos8, but it did not work. I later found out it is deprecated now.
I am going to try iptable to see whether it will work.
Any hints or tips?
by nmrdukeman
2020/08/18 22:00:37
Forum: CentOS 8 - Networking Support
Topic: Firewalld IP Addresses
Replies: 3
Views: 163

Firewalld IP Addresses

Hi, I am trying to set up to allow only several static IP address computers to have assess to a server through ssh or sftp. I have a created a active/default zone with only ssh server with a different port number. So far so good. I tried firewall-cmd --permanent --add-source=192.168.2.50 (static IP ...
by nmrdukeman
2020/08/18 15:58:50
Forum: CentOS 8 - Networking Support
Topic: Cron
Replies: 1
Views: 82

Cron

Hi, I need to remote backup files from three different /home/user /directories on a client to the data server computer with the same /home/user directories. I have already set up passwordless ssh between all these accounts in order to use rsync to fetch the data from one /home/user (client) to /home...
by nmrdukeman
2020/08/17 16:10:27
Forum: CentOS 8 - Networking Support
Topic: ssh port number
Replies: 1
Views: 84

ssh port number

Hi, I have a simple question about ssh port numbers. I have one local data server (Centos 8) and bunch of local clients (Centos 7). The first thing that we do is to use "rsync" to fetch all the data from the clients to the data server. Secondly, people can use "sftp" remotely to download the data fr...
by nmrdukeman
2020/07/24 15:19:41
Forum: CentOS 8 - Networking Support
Topic: Firwalld vs TCP Wrapper/ static IP addresses
Replies: 0
Views: 112

Firwalld vs TCP Wrapper/ static IP addresses

Hi, I have several computers at work that I need to figure out how connect them for ssh. All the computers are run on Centos 8 and 7, and are given a static IP address. 1. With Firewalld on Centos, do I still need TCP wrapper? Can I configure the ssh daemon and allowed IP addresses directly on Firew...

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