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Soho 3 Sonicwall - keeps clients from connecting

I have client with a small office network using a Windows SBS 2003 server. DHCP on the network is handled by the SBS server.

He has wireless set up so people come in and connect with their laptops.

His firewall is a Sonicwall Soho 3. DHCP is turned off on this device.

Every few days I get a problem where someone can't connect to my network with their computer or iphone or whatever.

The only solution is to reboot the Sonicwall.

The Sonicwall currently reports:
Number of IP addresses allowed with this license: 25
Number of IP addresses in use: 25
Number of Global VPN Clients allowed with this license: 1
Current connections: 59

Is there something I can do to prevent this from happening.

My client doesn't want to spend the money on a new sonicwall. We could set up an open source gateway, but ideally, I would just like to continue using this SOHO 3 because it is completely serviceable otherwise.
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mrmyth
Asked:
mrmyth
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2 Solutions
 
Aaron TomoskyTechnology ConsultantCommented:
The low end sonicwalls have ip limits. It doesn't matter if they do dhcp or not. It's silly. Anyway I think the only thing you can do is decrease the arp timeout so devices dont get remembered for as long but it won't actually let you have more devices.

Any devices that need to go through the sonicwall will count toward the 25 limit.

You can either use a seperate router for the wireless stuff and plug it's wan into a switch along with the wan of the sonicwall if you have two ips, or upgrade the sonicwall to a tz210 or something.
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digitapCommented:
indeed, i'll second aaron's asessment. most sonicwall appliances these days come with unlimited connections. the older models have the number they will allow to connect on the bottom. yours apparently is 25. once you hit that limit, any new connections won't be able to get to the internet. power cycling the sonicwall clears that and users can connect again...up to the 25 user limit.

based on the specs of the soho 3 above, you probably could get away with a TZ 200 (or possibly a TZ 100) rather than a 210 and save yourself some money.

http://www.sonicwall.com/us/products/TZ_Series.html#tab=compare

is the current wireless hardware in bridge mode? can you put it back to NAT'ing the wireless hosts in order to get one IP connecting to the soho 3?
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mrmythAuthor Commented:
the only thing you can do is decrease the arp timeout so devices dont get remembered

On what device would I decrease the arp timeout? Is that like a lease time?

I will try to make the wireless router work with NAT, but I remember I was having a really hard time with doing that before.

Otherwise I'm probably going to have to either upgrade the sonicwall or replace it with another substitute.
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digitapCommented:
well, the soho 3 is a really old appliance. it's probably time.

you'd set ARP on the soho 3. are you running the enhanced or standard version of OS? what version of firmware are you running on your soho? i haven't been in a soho in a very long time. i have most settings memorized in the newer models. if you reply with more information about your soho, i might be able to get you the information you need.
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digitapCommented:
sorry, information about arp cache.

It is sometimes necessary to flush the ARP cache if the IP address has changed for a device
on the network. Since the IP address is linked to a physical address, the IP address can change
but still be associated with the physical address in the ARP Cache. Flushing the ARP Cache
allows new information to be gathered and stored in the ARP Cache. Click Flush ARP Cache
to clear the information.

To configure a specific length of time for the entry to time out, enter a value in minutes in the
ARP Cache entry time out (minutes) field.

Source: SonicOS Enhanced 4.0 Administrator Guide
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mrmythAuthor Commented:
Thank you.

Here is the version of the firmware that I'm running and some other specs.
# Model: SOHO3 (CPU: Toshiba 3927 H2 / 133 Mhz)
# Firmware version: 6.6.0.6
# ROM version: 6.2.0.0
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mrmythAuthor Commented:
I looked at the SOHO3 and I can't find any ARP adjustments.

Maybe I'll try the switch idea and have the wireless bypass the SOHO completely, using another available WAN IP for the wireless.
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digitapCommented:
that might not be a bad idea. if the wireless users are not needing access to LAN resources, then no worries, right? i've looked and i can't find the manual anywhere. if the hosts don't need the access, i think your idea is right on.
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mrmythAuthor Commented:
Thanks for the help!
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digitapCommented:
sure...thanks for the points!
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