Synchronizing Tunnel Information To synchronize VPN information for a SonicWALL appliance with Dell SonicWALL GMS, use the vpnmonitor synchronize command. sgms> vpnmonitor synchronize firewall-sn Syntax Table 105. Syntax firewall-sn Serial number of the firewall to view. Example In the following example, tunnel status information for each VPN tunnel on the SonicWALL appliance with serial number 004010126FB0 is synchronized with Dell SonicWALL GMS: sgms> vpnmonitor synchronize 004010126FB0