This could also be because of a protocol mismatch. In 2017 Microsoft patched Windows Servers and advised to disable the SMB1 protocol. From now on, mount.cifs might have problems with the protocol negotiation. The error displayed is “Host is down.”, but when you do debug with: smbclient -L <server_ip> -U <username> -d 256 you will … Read more
I would prefer the ssh-keygen -y -e -f <private key> way instead of the accepted answer of How do you test a public/private DSA keypair? on Stack Overflow. ssh-keygen -y -e -f <private key> takes a private key and prints the corresponding public key which can be directly compared to your available public keys. (Hint: … Read more
Actually there is a way to kill a connection – killcx. They claim it works in any state of the connection (which I have not verified). You need to know the interface where communication happens though, it seems to assume eth0 by default. UPDATE: another solution is cutter which comes in some linux distros’ repositories.
This sed line should do the trick: sed -i ‘/^$/d’ file.txt The -i means it will edit the file in-place.
To list apache loaded modules use: apachectl -M or: apachectl -t -D DUMP_MODULES or on RHEL,CentoS, Fedora: httpd -M For more options man apachectl. All these answers can be found just by little google search.
First of all – you should check if forwarding is allowed at all: cat /proc/sys/net/ipv4/conf/ppp0/forwarding cat /proc/sys/net/ipv4/conf/eth0/forwarding If both returns 1 it’s ok. If not do the following: echo ‘1’ | sudo tee /proc/sys/net/ipv4/conf/ppp0/forwarding echo ‘1’ | sudo tee /proc/sys/net/ipv4/conf/eth0/forwarding Second thing – DNAT could be applied on nat table only. So, your rule should … Read more
You should use openssl s_client, and the option you are looking for is -tls1_2. An example command would be: openssl s_client -connect google.com:443 -tls1_2 If you get the certificate chain and the handshake you know the system in question supports TLS 1.2. If you see don’t see the certificate chain, and something similar to “handshake … Read more
When your computer is shut down (or the cron daemon is otherwise not running), cron jobs will not be started. If you have jobs that you would like to run after the fact during those times when the computer is shut down, use anacron. Installed by default, see “man anacron”, “man anacrontab”, or the file … Read more
A Docker image bundles application and “platform”, that’s correct. But usually the image is composed of a base image and the actual application. So the canonical way to handle security updates is to update the base image, then rebuild your application image.
To answer your question succinctly, no: there would not be any “leftover” rules after flushing every table. In the interest of being thorough however, you may want to set the policy for the built-in INPUT and FORWARD chains to ACCEPT, as well: iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT iptables … Read more