I'm new to firewalls, so please go easy.

The external device on my server is 192.168.1.2 and connects to the Internet through a DSL (router on the same network). The internal device is on a private network. The Squid server happily retrieves web pages when the firewall is turned off.

I will need to masquerade but just want to configure the firewall to allow a client to retrieve web pages via Squid for starters. I cannot do an nslookup from the command line with the firewall running. I do not have DNS running, I am using my ISP's DNS servers, which are in resolv.conf.

I have followed the simple procedures in howto's and the Suse admin guide with no joy. The more I read the more confusing it seems to become.

I have the following paremeters set in the SuSEfirewall config file:

FW_QUICKMODE="no"
FW_DEV_EXT="eth0"
FW_DEV_INT="eth1"
FW_ROUTE="no"
FW_MASQUERADE="no"
FW_MASQ_DEV="$FW_DEV_EXT"
FW_MASQ_NETS="0/0"
FW_PROTECT_FROM_INTERNAL="yes"
FW_AUTOPROTECT_SERVICES="yes"
FW_SERVICES_EXT_TCP="domain http https 8080"
FW_SERVICES_EXT_UDP="domain"
FW_SERVICES_EXT_IP=""
FW_TRUSTED_NETS=""
FW_ALLOW_INCOMING_HIGHPORTS_TCP="yes"
FW_ALLOW_INCOMING_HIGHPORTS_UDP="yes"
FW_FORWARD=""
FW_FORWARD_MASQ=""
FW_REDIRECT="177.10.7.0/24,192.168.1.0/24,tcp,80,8080"
FW_STOP_KEEP_ROUTING_STATE="no"

Help on this would be greatly appreciated.

The best help would be to stop editing the text file, and just run the graphical config. You should be able to open up the proper ports using it.