Cannot ping/connect to HP or Kyocera printer over VPN tunnel

We set up a branch office VPN tunnel today. Traffic flows fine, and we can ping and access most nodes between the offices. However, two printers, an HP 4200N and a Kyocera TASKalfa 520i cannot be pinged or connected to over the VPN. On the LAN the two printers are fully accessible. On the opposite side of the VPN, the firewall can't even ping the printer IP addresses either. Anyone know why these printers might block or drop traffic coming from the VPN?
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Mike RoeCommented:
the Hp printer uses port 9100 so you need to open that port on the firewall for the vpn connection.  The other printer may use the same port.
MISquaredAuthor Commented:
Thanks for the suggestion, but that's not it. The VPN tunnel does not discriminate what type of traffic goes between the two peers, and the default outbound policy, for all traffic, is allow. I think it's something with IPSec. I have a suspicion that it's IPSec related or something along those lines.
Mohammed KhawajaManager - Infrastructure:  Information TechnologyCommented:
Check printer IP configuration and I bet you there is no default gateway defined.

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MISquaredAuthor Commented:
Spot on, mnkhawaja. Both printers had incorrect gateways set.
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