Printer disconnect automatically after installing sonicwall

Hi Nakul,

How is it "disconnecting"? What is it disconnecting from...the print server, the PCs, etc.? Can you go over your setup a little more...are you using a print server or are the PCs just connecting strait to the Printer? Is the printer in the same Zone as the other machines?

How are you testing the printer without the SonicWALL - direct test using an Ethernet cable straight to the printer?

Let me know so I can help. Thanks!

Hi ,

So Setup is simple. We have 5 computers and one 16 port switch 2 commercial printer and a verizon wireless router.

Printers are connected through switch. we use fiery desktop app to connect with those printer. Printers are added on this app and usually we just click on connect and it connects.

Now after installing firewall, i am trying to do it same way. I click on connect and it connects. I am able to print but after 3-4 minutes it will disconnect me from the printer. Then i have to reconnect it to make it work.

All computers and printer are connected to switch. Internet is working fine. Just having issue with the printer.

To test without sonicwall, i just unplugged the ethernet cable from lan port of sonicwall and plugged in back to verizon router.

And no other changes occurred except replacing your firewall? What was the previous make/model you replaced?

Did you change your IP schemas or VLANs? Are you running VLANs or separate Zones for the printers and the computers?

There was no firewall previously.

No, i didn't touch any of the stuff. I just simply installed it and enable wireless network. Thats it

OK so they had a modem before with a switch or no switch? Verify the correct network setting are in place in the printers.

I'm wondering how the DHCP configuration was setup previously...maybe there are IP conflicts. Are the printer statically assigned now and is SonicWALL managing the DHCP?

If you they are assigned and SonicWALL is managing DHCP, remove the static assignment and create Static Assignments within the SonicWALL (Network > DHCP Server).

Can you continuously ping the printers from a computer (RUN > CMD, type ping <print_ip> -t) and the SonicWALL (System > Diagnostics > Diagnostic Tools, select Ping)?

Yes. There is a verizon modem/router with 16 port switch. I am not sure about the old settings.

Yes sonicwall is managing DHCP

You may have an IP address conflict.

Does the printer have a fixed IP address? If yes, did you set it manually, or is it set as a reservation on the Sonicwall. What is the IP address of the printer?

I just simply installed it and enable wireless network. Thats it

You must have changed something else. If the Sonicwall manages DHCP, what DHCP server did you use before the Sonicwall? And how come the Sonicwall is now doing it?

Yes i have manually added ip address on printer.

No i have not added any ip address on sonicwall for printer.

192.168.168.114

If the sonicwall gives that address to any other device you are in trouble. You need to check your settings on the sonicwall (and the previous DHCP server) to make sure there is no conflict.

BTW you didn't answer my other question: what else did you change to make the sonicwall the DHCP server?

Please re-read my previous post and let me know if you can ping as suggested: https:#a42406872

I'm almost positive this is an IP Address issue. Are you saying your old subnet was 192.168.168.0. The 192.168.168.0 is the SonicWALL default so unless your modem/router had the same subnet (which is highly unlikely) then I think this is the major change that has taken place "under the radar" so to speak. Did you put the Verizon modem into transparent mode and disable all firewall, NAT and DHCP functions?

What I said was get the MAC address of the printers and add them in the SonicWALL DHCP server as Static Addresses (that is the Windows equivalent of DHCP Reservations). This requires you to remove all the static entries you made in the printers previously, e.g. Gateway IP, IP Address, DHCP Server (if applicable), and DNS settings. Save and reboot the printers.

Then retest and let me know.

When i ping printer ip address, Most of the time it fails. Request timed out or there will be packet loss.

Are you pinging the printer name, FQDN or the IP address? Did you notice you have a reply from 192.168.168.6! What does that address belong to?

Is 192.168.168.169 the base station of the printer or the fiery of one of the printers?

Thats my computer Ip.

I have 2 printers and both have Fiery on it.

IC-415-1070P
IC-414-1070

Going back to my earlier question.

Which DHCP server did you use before the Sonicwall?
Is that device still on the network? If yes, did you disable it as a DHCP server?

Yes Verizon router is still on network. No i didn't made any changes on that device.

Your SonicWALL should have DHCP Server conflict detection enabled - please verify. You should put your Verizon modem into Bridge Mode aka Transparent Mode. If not you could have double NATTING going on. You need to make sure you have disabled all the firewall, NAT and DHCP functions in the Verizon Modem.

As Blue Street Tech says, make sure there is only one DHCP server on your network.

Yes DHCP conflict detection is enabled

No i didn't made these changes on verizon.

Go into your SonicWALL under Network > Interfaces and tell me if the WAN IP address is local or public.

Its local.

Any update on this...how is the re-configuration going? Did you find the other DHCP Server?

Hi BlueStreetTech,

Sorry for the late response. 2 cables were causing packet loss. I changed all network cables and got a new switch. Its working fine now. Thank a lot for your support. You are always helpful.

Thanks BlueStreetTech.

You're very welcome! Its my pleasure.