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User Help

Permission denied (publickey) error when I want to enter a password

I have somehow messed up my Windows machine and now I can no longer ssh to an UNIX host. Previously I was able to ssh and then enter my password and it worked fine. Now when I try to ssh I get the error: Permission denied (publickey). I do not get a chance to enter […]

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Linux Mastering Development

Cannot connect to ssh server using ethernet, but can over WI-FI

I have a running Centos 8 server with enabled sshd and static ip, the problem is that I can’t connect to my ssh server from Windows 10, but I can connect using my Debian system. When trying to connect from windows using PuTTY or any other ssh client software I get “Connection time out” error. […]

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Linux Mastering Development

Cannot connect to ssh server using ethernet, but can over WI-FI

I have a running Centos 8 server with enabled sshd and static ip, the problem is that I can’t connect to my ssh server from Windows 10, but I can connect using my Debian system. When trying to connect from windows using PuTTY or any other ssh client software I get “Connection time out” error. […]

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Linux Mastering Development

Can’t connect to my ssh server with my second ssh client

I have a running Centos 8 server with enabled sshd and static ip, the problem is that I can’t connect to my ssh server from Windows 10, but I can connect using my Debian system. When trying to connect from windows using PuTTY or any other ssh client software I get “Connection time out” error. […]

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Linux Mastering Development

Can’t connect to my ssh server with my second ssh client

I have a running Centos 8 server with enabled sshd and static ip, the problem is that I can’t connect to my ssh server from Windows 10, but I can connect using my Debian system. When trying to connect from windows using PuTTY or any other ssh client software I get “Connection time out” error. […]

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User Help

SSH from one VM to anther keeps failing – under same NAT network

I’ve set up two vm running on same virtualbox host, they are working under same NAT Network and each has grained an IP. Their network setting looks like: In order to make SSH works, I’ve followed instruction of this thread, and my port forward setting looks like: The ssh_config and their network interface are default, […]

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Mastering Development System & Network

OpenSSH Connection Close after modification of ciphers / mac

the sshd config file was recently modified in order to have weak ciphers / macs removed. However, it seems like also important macs have been removed as it is not possible to login via SSH anymore. These lines were added to the open sshd config: ciphers chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com mac umac-64-etm@openssh.com,umac-128-etm@openshh.com,hmac-sha2-256-etc@openssh.com,mac-sha2-512-etc@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512 This is the log of trying […]

Categories
Mastering Development System & Network

OpenSSH Connection Close after modification of ciphers / mac

the sshd config file was recently modified in order to have weak ciphers / macs removed. However, it seems like also important macs have been removed as it is not possible to login via SSH anymore. These lines were added to the open sshd config: ciphers chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com mac umac-64-etm@openssh.com,umac-128-etm@openshh.com,hmac-sha2-256-etc@openssh.com,mac-sha2-512-etc@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512 This is the log of trying […]

Categories
Mastering Development System & Network

OpenSSH Connection Close after modification of ciphers / mac

the sshd config file was recently modified in order to have weak ciphers / macs removed. However, it seems like also important macs have been removed as it is not possible to login via SSH anymore. These lines were added to the open sshd config: ciphers chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com mac umac-64-etm@openssh.com,umac-128-etm@openshh.com,hmac-sha2-256-etc@openssh.com,mac-sha2-512-etc@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512 This is the log of trying […]

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User Help

Connect two computers on two different subnets with two separate account names via ssh without password

I have two computers separated by the Internet. I want to connect the two together from Computer 2 to Computer 1 using a SSH tunnel without requiring a password. ________ ________ | | | | | | ______ _____ _______ | | |________|—|______|—|_____|—/ Internet /—|_______|—|________| / \ Router Modem Gateway / \ /____________\ /____________\ Computer […]