Hello,
when doing a devicetester scan with supplied SSH information, i get this (good looking) result:
Pinging 129.103.3.107
	Ping ok.
Scanning TCP ports..
	Open ports:
		22 (SSH)
		80 (HTTP)
		443 (HTTPS)
	Closed ports:
		21 (FTP)
		23 (Telnet)
		25 (SMTP)
		135 (EPMAP)
		139 (NetBIOS Session Service)
		445 (SMB)
		5060 (SIP)
		9100 (Jetdirect)
Scanning MAC..
	A4:BA:DB:37:D1:F4
Scanning netbios (UDP)..
	Could not scan netbios
Scanning HTTP..
	Url: http://129.103.3.107
	Certificate issuer: O=Falconstor Software, L=Melville, S=New York, C=US
	Error: The remote server returned an error: (401) Unauthorized.
	Connection: close
	Content-Length: 401
	Content-Type: text/html; charset=iso-8859-1
	Date: Thu, 24 Jan 2013 08:20:54 GMT
	Server: Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8e-fips-rhel5 PHP/5.2.9
	WWW-Authenticate: Basic realm="Password Required"
	Title: 401 Authorization Required
Scanning HTTPS..
	Url: https://129.103.3.107
	Certificate issuer: O=Falconstor Software, L=Melville, S=New York, C=US
	Error: The remote server returned an error: (401) Unauthorized.
	Connection: close
	Content-Length: 401
	Content-Type: text/html; charset=iso-8859-1
	Date: Thu, 24 Jan 2013 08:20:54 GMT
	Server: Apache/2.2.11 (Unix) mod_ssl/2.2.11 OpenSSL/0.9.8e-fips-rhel5 PHP/5.2.9
	WWW-Authenticate: Basic realm="Password Required"
	Title: 401 Authorization Required
Scanning SSH..
	SSH server: SSH-2.0-OpenSSH_4.3
	System info: Linux ipstorrz1 2.6.18-128.el5 #1 SMP Wed Jan 21 08:45:05 EST 2009 x86_64 x86_64 x86_64 GNU/Linux
	Hostname: ipstorrz1
	Kernel name: Linux
	Kernel release: 2.6.18-128.el5
	Kernel version: #1 SMP Wed Jan 21 08:45:05 EST 2009
	Processors: 
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
		 Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz
	Disks: 
		Filesystem            Size  Used Avail Use% Mounted on
		/dev/sda3             9.5G  2.6G  6.5G  28% /
		/dev/sda2             9.5G  3.0G  6.1G  33% /usr
		/dev/sda1             965M   34M  882M   4% /boot
		tmpfs                 7.8G     0  7.8G   0% /dev/shm
		/dev/sda6              21G  361M   20G   2% /apps
		/dev/sdb1              99G  188M   93G   1% /SysApps
Scanning SNMP..
	Hostname: ipstorrz1
	Description: Linux ipstorrz1 2.6.18-128.el5 #1 SMP Wed Jan 21 08:45:05 EST 2009 x86_64
	ObjectID: 1.3.6.1.4.1.7368.5.10
	Uptime: 13d 4h 27m 43s 870ms
	Contact: fs <support@falconstor.com>
	Location: www.FalconStor.com
	MAC 2: A4 BA DB 37 D1 F4
	MAC 3: A4 BA DB 37 D1 F6
	MAC 4: A4 BA DB 37 D1 F8
	MAC 5: A4 BA DB 37 D1 FA
	IpForwarding: 2
Done.
Since we use different SSH credentials, I added them under "other credentialks" and mapped them under "unique IP credentials" to both FalconStor nodes.
However, I get this error Message while scanning:
Cannot connect to SSH server.  24/01/2013 09:25:46 
SSH Error  Could not connect to SSH with credentials FalconStor (root), Global (root)   24/01/2013 09:25:46 
Find solutions to common problems in the troubleshooting guide