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The following packages will be upgraded:                                                                      
  spye-firewall                                                                                               
1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded.                                       
Need to get 0B/10,9kB of archives. After unpacking 0B will be used.                                           
Do you want to continue? [Y/n/?]                                                                              
(Reading database ... 324698 files and directories currently installed.)                                      
Preparing to replace spye-firewall 2.0.21 (using .../spye-firewall_2.0.23_all.deb) ...                        
[E] Invalid metacall to net: Could not find [meta_net] on <Root plugin>
invoke-rc.d: initscript spye-firewall, action "stop" failed.
dpkg: warning: subprocess old pre-removal script returned error exit status 100
dpkg - trying script from the new package instead ...
[E] Invalid metacall to net: Could not find [meta_net] on <Root plugin>
invoke-rc.d: initscript spye-firewall, action "stop" failed.
dpkg: error processing /var/cache/apt/archives/spye-firewall_2.0.23_all.deb (--unpack):
 subprocess new pre-removal script returned error exit status 100
No apport report written because MaxReports is reached already
                                                              [*] Resetting iptables:
    iptables -F
    iptables -P FORWARD ACCEPT
    iptables -P INPUT DROP
    iptables -P OUTPUT ACCEPT
[*] Reset complete. Loading iptables:
    iptables -A INPUT -p tcp ! --syn -j ACCEPT
    iptables -A INPUT -i lo -j ACCEPT
    iptables -A INPUT -p icmp --icmp-type any -j ACCEPT
    iptables -A INPUT -p tcp --dport 22 --syn -j ACCEPT
    iptables -A INPUT -p udp --dport 123 -j ACCEPT
    iptables -A INPUT -p udp --dport 64738 -j ACCEPT
    iptables -A INPUT --source 10.0.0.50 -j ACCEPT
    iptables -A INPUT -p udp --dport 1024: --sport 53 -j ACCEPT
    iptables -A INPUT -p tcp --syn -j REJECT
    iptables -A INPUT -p udp -j DROP
Processing triggers for python-central ...
Errors were encountered while processing:
 /var/cache/apt/archives/spye-firewall_2.0.23_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover: