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The (commandline) utility you should be using is journalctl. E.g. to look at the the dmesg output: journalctl --dmesg or parseable entries relating to the firewall: journalctl --output=json-pretty UNIT=firewalld.service For a list of selectable UNIT use the usual tools: journalctl --output=json-pretty | grep -F UNIT | sort -u See man journalctl on ...


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If you don't have a static IP address, you shouldn't be sending email directly to the Internet. Kudo's to your ISP for blocking the spambots on their network from reaching me. Even if you were allowed to send email, many hosts would refuse your mail or route it to the spam box. Configure you mail server to send via your ISP's relay server. Many ...


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If your ISP is blocking outbound port 25, you've probably made a bad choice in the location of your mailserver. Because port 25 is blocked, I am assuming you have a machine inside your home/office, vs using a server. I would highly recommend that you take what you've learned from setting up postfix and install it on a cheap VPS. It is not a good idea to ...


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Distros like nanoBSD, bowlfish and others use memory file systems for things like /etc, var, /tmp and others so they do not write to the flash storage. Obviousy /tmp an be safely lost without preventing reboot to a working system, and for the others the OS variant manages writing what's in the MFS mounts to the persistent storage. Bowlfish does this through ...


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I don't know which OS platform & version you are using But TCP Wrappers can help Edit your /etc/hosts.allow file #first Allow all local connections ALL: 127.0.0.1 #allow ssh Access to IPs this is important as you need to allow some users to login via ssh sshd: 1.1.1.1 sshd: 2.2.2.2 #change above Ips to your need then only those will have ssh ...


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so the RST message shouldn't freak you out. It occurs whenever you attempt to access a service that is firewalled or the OS is telling you that there's no such service listening on this port (Incidentally, this trick is used by traceroute to find out when traceroute needs to stop it's probing.). Let's take a look at what I am TCP sockets are in the Listen ...


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Executing iptables-save will dump your current iptables ruleset to stdout, in turn showing you the commands used to create your firewall ruleset, minus the iptables command



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