Sonicwall 330 pro

I have no idea what firewall you are using. Your posting is lacking crucial detail and that makes this almost impossible to answer you. However, I use a Cisco 5520 in a Data Center and i Host my own Exchange server. This is what you have to do to allow inbound and outbound SMTP traffic in that type of environment.

name (Internal IP here) Exchange description Internal mail server

access-list Inside_access_in remark Allow internal Exchange Server to send SMTP email outbound.
access-list Inside_access_in extended permit tcp host (Internal IP Here) any eq smtp

access-list outside_access_in remark Allow external entities to send SMTP email to Exchange Server
access-list outside_access_in extended permit tcp any host (Public IP Here) eq smtp

Hope this helps you.
Brian

If the SonicWALL's admin password is lost, there is no backdoor or other mechanism to bypass the administrator login. Please note that prefs files do not contain the admin name and password. So if you reset the firmware and import a current prefs file, you can gain access using the default login credentials ('admin' & 'password'). Without a current prefs file, you must reset the firmware and configure from scratch.

For models running SonicOS (Enhanced or Standard), you can reboot to factory defaults. This resets all settings including the admin name, password and LAN IP address. Import the current prefs file. The configuration is restored and use the defaults 'admin' and 'password' to login.

For models running Firmware 6.X, you must reset the firmware (wipe and upload using the reset procedure). Import the current prefs file. The configuration is restored and use the defaults 'admin' and 'password' to login. The 'Reset to Factory Defaults' button does not reset the admin name, password or LAN IP address for these models

1) Reset do default the device (rear reset button)
2) Set your PC a IP like 192.168.0.xxx (defaul IP address for DWL-2100 AP is 192.168.0.50)
3) Connecto via browser to 192.168.0.50, defaul login


To set IP address on you PC: goto LAN devices, click properties on your LAN, scroll down and selectInternet Protocol (TCP/IP), click properties, click set followingIP address:

IP: 192.168.0.1
Subnet: 255.255.255.0
Default Gateway: 192.168.0.50

If this information can help you, please rate me ;)

Use the Sonicwall configuration wizard..

Please find below is to configure what ever you want.

Setup Wizard - This wizard will help you quickly configure the SonicWALL to secure your Internet connection. Once completed, you can use the SonicWALL Web Management Interface for additional configuration.

Registration & License Wizard - This wizard will help you register you and your firewall with mysonicwall.com and obtain licenses for additional Security Services features.

PortShield Interface Wizard - Segment and configure the integrated managed LAN switch of the SonicWALL.

Public Server Wizard - Quickly configure your SonicWALL to provide public access to an internal server.

VPN Wizard - Create a new site-to-site VPN Policy or configure the WAN GroupVPN to accept connections from the SonicWALL Global VPN Client
Thanks
..

How do I access the SafeMode menu?
In emergency situations, you can access the SafeMode menu by holding in the Reset button on the back
of the TZ 180 (it’s the small pinhole button located to the left of the Console port) for 12-14 seconds until
the ‘Test’ light begins flashing yellow. When the SonicWALL is booted into the SafeMode menu, assign a
workstation a temporary IP address of 192.168.168.200 and attach it to a LAN interface on the TZ 180
Then, using a modern web browser (Microsoft IE6.x, Mozilla 1.4+), access the special SafeMode GUI
using the device’s default IP address of 192.168.168.168. You will be able to boot the device using a
previously saved image, or you can upload a new version of firmware with the ‘Upload New Firmware’
button.

Complete documentation is available on the below link

http://www.sonicwall.com/us/support/3134.html#heading_3139

open control panel and then add printers and other hardware, then up in left hand menu go to system then hardware, device managed and check if your driver is updated. if it says it's working properly then uninstall it and it'll pop back up reinstall then it should work fine.

it might probably a security issue , can u remember from which machine and from what ip you access the firewall before ??

Try to assign the ip from which you have last accessed your firewall
Good luck

Try to upgrade the firmware revision to the last one (1.21).
I had similar problem with the dpr-1260 firmware rev 1.00.
Now after the firmware upgrade the problem seems solved

If you're within a network and try connecting to computers on it with the WAN public IP, it simply won't work - you must use the network IP. On an external Internet connection, it should connect fine to the public IP. If you have access to an external machine (remote desktop), or if you know of an FTP proxy, you can try it that way. I also believe http://www.webftp.co.uk/ a web based FTP client would act as somewhat of a proxy, you could try that with the public IP and see how you go.