Setting up and using remote support - Revision history

Gregory: /* How to uninstall/reinstall cygwin */

2021-02-15T11:24:15Z

How to uninstall/reinstall cygwin

← Older revision		Revision as of 11:24, 15 February 2021
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	Teamviewer required as sshd service will be removed.		Teamviewer required as sshd service will be removed.

	~~In Cygwin:~~
	1. ~~List~~ installed service names (repeat step 2 to 3 for each service):		1. In Cygwin, list installed service names (repeat step 2 to 3 for each service):
	cygrunsrv -L		cygrunsrv -L
	2. Stop all services in step 1:		2. Stop all services in step 1:

Gregory: /* How to uninstall/reinstall cygwin */

2021-02-15T11:22:43Z

How to uninstall/reinstall cygwin

← Older revision		Revision as of 11:22, 15 February 2021
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	==How to uninstall/reinstall cygwin==		==How to uninstall/reinstall cygwin==

	~~With setup.exe (the installer file of cygwin) you can uninstall individual packages but not Cygwin~~.		Teamviewer required as sshd service will be removed.

	~~Before you do this, make sure you have stopped the cygwin~~ service (~~NET STOP SSHD~~)~~, removed the sshd server (~~cygrunsrv -~~R sshd), deleted the~~ sshd & sshd_server users (net user sshd /DELETE)		In Cygwin:
			1. List installed service names (repeat step 2 to 3 for each service):
			cygrunsrv -L
			2. Stop all services in step 1:
			cygrunsrv --stop <service_name>
			3. Remove service:
			cygrunsrv --remove <service_name>
			4. Delete sshd and sshd_server users:
			net user sshd /DELETE
			5. Delete all the files/directories within C:\cygwin (in DOS prompt):
			rmdir /s /q C:\cygwin
			6. Delete desktop shortcut but keep the installation setup-x86.exe in downloads if available to reinstall if required.

	~~To uninstall Cygwin you have~~ to ~~run the following in DOS prompt:~~		The cygwin folder can't be deleted due to a Access Denied error, even when all cygwin services are stopped.

	~~rmdir /s /q C:\cygwin~~		[[#Installing_Cygwin_with_OPENSSH \| Install Cygwin]]

	~~You cannot delete the~~ cygwin ~~folder from Windows explorer due to a Access Denied error and this is the best way to~~ uninstall ~~cygwin.~~		Ref: https://cygwin.com/faq/faq.html#faq.setup.uninstall-service

	==Adding packages to Cygwin after installation==		==Adding packages to Cygwin after installation==

Pratishthit: /* Configuring and starting SSHD */

2021-02-07T13:23:15Z

Configuring and starting SSHD

← Older revision		Revision as of 13:23, 7 February 2021
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	Only asked if running again:		Only asked if running again:
	Overwrite existing /etc/ssh_config file? yes		Overwrite existing /etc/ssh_config file? yes
	Overwrite existing /etc/~~sshs_config~~ file? yes		Overwrite existing /etc/sshd_config file? yes
	.		.
	StrictModes - no		StrictModes - no
	Privilege – yes		Privilege - yes
	New local sshd account - yes		New local sshd account - yes
	Install SSHD as a service - yes		Install SSHD as a service - yes
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	In case it does not copy sshd_config to ashwin_temp, than check whether an ashwin_temp filename exists and delete it using the rm command.		In case it does not copy sshd_config to ashwin_temp, than check whether an ashwin_temp filename exists and delete it using the rm command.

	=== Enable Remote Connection on Windows to allow connection through Remmina ===		===Enable Remote Connection on Windows to allow connection through Remmina===

	# Open System Properties from Explorer		#Open System Properties from Explorer
	# Click on Remote settings		#Click on Remote settings
	# Under 'Remote' section, check Remote Assistance (disabled on Win 2008 servers) and Remote Desktop to allow remote connections to this computer.		#Under 'Remote' section, check Remote Assistance (disabled on Win 2008 servers) and Remote Desktop to allow remote connections to this computer.

	[[File:Win remote connection.png]]		[[File:Win remote connection.png]]

Gregory: /* Initial Connection to the server before setting up permanent remote connection */

2021-02-07T07:28:27Z

Initial Connection to the server before setting up permanent remote connection

← Older revision		Revision as of 07:28, 7 February 2021
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	For remote installation you need to get an initial connection to the server before you can setup Cygwin for a permanent remote connection.		For remote installation you need to get an initial connection to the server before you can setup Cygwin for a permanent remote connection.

	~~Use either use your customised reverse connect UltraVNC SC file or~~ the one-time run [[~~link~~:neosys.com/help \| ~~Teamviewer~~]] ~~utility~~. ~~(Teamviewer is typically used)~~		Get the one-time run quick support teamviewer utility from [[https://neosys.com/help\|Team Quick Support]]. Otherwise refer to the wiki to install customised reverse connect "UltraVNC" SC file.

	If the client has already gone ahead and provided Microsoft RDP with an obvious/weak system password, then Support MANDATORY MUST get Windows reinstalled from scratch. Antivirus may not be able to tell that the server has been infected and rootkitted and therefore a scan does not prove it has not been infected.		If the client has already gone ahead and provided Microsoft RDP with an obvious/weak system password, then Support MANDATORY MUST get Windows reinstalled from scratch. Antivirus may not be able to tell that the server has been infected and rootkitted and therefore a scan does not prove it has not been infected.

Gregory: /* Initial Connection to the server before setting up permanent remote connection */

2021-02-07T07:13:21Z

Initial Connection to the server before setting up permanent remote connection

← Older revision		Revision as of 07:13, 7 February 2021
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	==Initial Connection to the server before setting up permanent remote connection==		==Initial Connection to the server before setting up permanent remote connection==

	For remote installation you need to get an initial connection to the server before you can setup Cygwin for a permanent remote connection. Use either use your customised reverse connect UltraVNC SC file or the one-time run [[link:neosys.com/help \| Teamviewer]] utility. (Teamviewer is typically used)		For remote installation you need to get an initial connection to the server before you can setup Cygwin for a permanent remote connection.

			Use either use your customised reverse connect UltraVNC SC file or the one-time run [[link:neosys.com/help \| Teamviewer]] utility. (Teamviewer is typically used)

	If the client has already gone ahead and provided Microsoft RDP with an obvious/weak system password, then Support MANDATORY MUST get Windows reinstalled from scratch. Antivirus may not be able to tell that the server has been infected and rootkitted and therefore a scan does not prove it has not been infected.		If the client has already gone ahead and provided Microsoft RDP with an obvious/weak system password, then Support MANDATORY MUST get Windows reinstalled from scratch. Antivirus may not be able to tell that the server has been infected and rootkitted and therefore a scan does not prove it has not been infected.

Pratishthit: Added section "Enable remote connection to allow connection from Remmina"

2021-01-31T06:45:16Z

Added section "Enable remote connection to allow connection from Remmina"

← Older revision		Revision as of 06:45, 31 January 2021
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	In case it does not copy sshd_config to ashwin_temp, than check whether an ashwin_temp filename exists and delete it using the rm command.		In case it does not copy sshd_config to ashwin_temp, than check whether an ashwin_temp filename exists and delete it using the rm command.

			=== Enable Remote Connection on Windows to allow connection through Remmina ===

			# Open System Properties from Explorer
			# Click on Remote settings
			# Under 'Remote' section, check Remote Assistance (disabled on Win 2008 servers) and Remote Desktop to allow remote connections to this computer.

			[[File:Win remote connection.png]]

	===Opening up ssh connections to additional source ip nos===		===Opening up ssh connections to additional source ip nos===

Gregory: /* Setting up email alerts for cygwin ssh logins */

2020-10-18T07:39:04Z

Setting up email alerts for cygwin ssh logins

← Older revision		Revision as of 07:39, 18 October 2020
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	2. Run Cygwin and copy & paste script below into new file sshrc. Change it@neosys.com to the email ID to which the alert needs to be sent.		2. Run Cygwin and copy & paste script below into new file sshrc. Change it@neosys.com to the email ID to which the alert needs to be sent.

	cd /etc		nano /etc/sshrc
	~~nano~~ sshrc

	<pre>		<pre>

Gregory: /* Configuring SSHD to use a non-standard port number */

2020-10-18T07:32:16Z

Configuring SSHD to use a non-standard port number

Show changes

Pratishthit: /* Configuring SSHD to use a non-standard port number */

2019-09-29T12:46:25Z

Configuring SSHD to use a non-standard port number

← Older revision		Revision as of 12:46, 29 September 2019
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	Press Ctrl+x to save. On the confirmation type Y and on the next prompt hit enter.		Press Ctrl+x to save. On the confirmation type Y and on the next prompt hit enter.

			net stop cygsshd
			net start cygsshd

			For older versions of Cygwin (Before Jan 2019)

	net stop sshd		net stop sshd

Pratishthit: /* Configuring and starting SSHD */

2019-09-29T12:40:48Z

Configuring and starting SSHD

← Older revision		Revision as of 12:40, 29 September 2019
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	At the command prompt type		At the command prompt type

			net start cygsshd

			For older versions of Cygwin (Before Jan 2019)

	net start sshd		net start sshd