centos

centos how to open a port on iptables

I have CentOS 6 How to open the 10.10.10.100 port 123 in iptables for the address. So that a host with the address 10.10.10.100 can access my centos on this port 123.

Port 443 does not open on CentOS 7. Opened the port in iptables and disabledfirewalld

Port 443 does not open on CentOS 7. I opened the port in iptables and disabledfirewalld. Open ports in iptables: Chain INPUT ... 00046s latency). Not shown: 997 closed ports PORT STATE SERVICE 22/tcp open ssh 80/tcp open http 111/tcp open rpcbind

How to upgrade from Centos 7.3 to Centos 7.6

How do I upgrade from Centos 7.3 to Centos 7.6? You need it on 7.6.1810, not newer. I tried to connect the distribution iso 7.6 and make it a repository, but updates are not pulled up from there.

TcpDump. How do I view the traffic coming to a specific port?

There is a simulator of a geodata transfer device operating over TCP/IP. This simulator is located on a remote server and sen ... tell me what you need to do to find out if there is traffic on a certain port number. I'm not good at system administration.

Forwarding VPN clients to the network

Good time of day. Such a problem - you need to organize a vpn channel between the remote server (CentOS) and the office. Th ... cmp-host-prohibited COMMIT Tell me where to dig - is it iptables you need to configure, or is there a problem in microtics?

how to install apt-get on CentOS 7

I try to install the apt-get package, but get the error [root@server ~]# sudo yum install apt-get Failed to set locale, defau ... inceton.edu * updates: mirror.rackspace.com No package apt-get available. Error: Nothing to do How to install it correctly?

How do I install Docker on Centos 6.10?

Executed commands to install Docker on Centos 6: # yum install epel-release # yum install docker-io In the terminal, the dock ... I want to run these commands # service docker start # service docker status # chkconfig docker on Writes unrecognized service

openSUSE or CentOS as a universal system?

Now at work there is Ubuntu, which performs the role mainly of the desktop, through VNC, if necessary, I connect from home to ... h of these distributions will cause less problems when setting up and working? Or am I looking in the wrong direction at all?

Centos 5 + vlan -> centos6 + vlan = what has changed?

Good afternoon, I transfer the system to new hardware and at the same time the OS. There was Centos 5. x, one physical netwo ... only on CentOS 5, everything works there.. P. s. I created files for vlans in the form of ifcfg-ethX.id, and as ifcfg-vlanid

Failed connection to the IMAP server

Hello, When trying to log in via Webmail (using RoundCube), I get the error: "Failed connection to the IMAP server" When ex ... Who can tell you what the problem may be, in which direction to dig ? How can I check the health of the IMAP server ? Thanks.

Zabbix: does not collect data from Zabbix-proxy on a closed network

I can't insert something in the form of code fragments, because I work through VMware Vsphere. I can provide all the necessar ... bix_proxy.conf settings (what I changed): ProxyMode=1 Hostname=zbx.proxy.1 DBName=Zabbix DBUser=Zabbix DBPassword=********

When you change the ssh port after a reboot, the server dies

So, we have a completely clean centos 7 system. And I decided first of all to change the ssh port there and do, for example, ... ything was fine, they are still working on a non-standard port. And then I took a few VPSok from a new hoster and here it is.

How to find out why the Linux routing table is changing

I connected Yota to the server (centos7) via USB as a backup communication channel. In the first seconds, everything is OK, t ... epeats. The addresses/routes on the other maps are written statically. How do I find out why the routing table is changing?

Do I need bind if I use DNSmanager?

Now on the CentOS 7 server there is apache and bind. When adding a domain, a config for the domain is created in bind, as wel ... dd the domain only in DNSmanager, but as master with the server IP specified. If so, will such a scheme work with subdomains?

Installing CentOS in VirtualBox

I downloaded the image from the official website. When I try to install from the ISO image in VirtualBox'e, I am offered a ch ... I tried the first 2 items, but after selecting them, a black screen hangs. What could be the problem? No errors are thrown...

Can't start phpDaemon-PECL eio event

Hello, gentlemen. ) I want to raise phpDaemon on Centos 6, everything seems to be done, but it was not there... Can't start ... how everyone writes everything in their own way, share a link to the proven installation instructions, if it's not difficult.

Problem with running Vesta Control Panel in virtualbox on ubuntu-16.04 and on cent os 7 " page not found"

I want to run a virtual server, put ubuntu-16.04 and cent os 7, Downloaded and there and there Vesta Control Panel, The i ... opened when I set it in the hosts file, registered the ip of my virtual server The ping command 188.186.234.234 outputs

How to return a raidz1-0 pool to zfs?

On a server with Centos and zfs, there are three pools. After the reboot, one pool fell off and the status shows this: zpoo ... stand that this is a physical problem with the sdw and sdx screws, or is it possible to somehow bring this raid back to life?

where can I view the default apache parameters used?

I use Centos 7.1 Apache and php are installed I want to configure all the Apache parameters, such as: StartServers ... e what parameters Apache uses now? The settings file /etc/httpd/conf/httpd.conf does not currently contain these parameters.

yum install trying other mirror-stop the process

Being an inexperienced user of linux systems, I ran into a problem: I connected to a remote server via PuTTY and tried to upd ... rver! What if I break something? And what if... " - these questions constantly sounded in my head. What was I supposed to do?