[gmcenroe]

I am getting back into my Indigo2 after about a year in which I had it turned off. I have had this computer since about 2000, and added peripherals to it, updated the OS from 5.3 to 6.5.22 and had it on the internet. At one point I had it on the internet probably with no firewall and my ISP complained to me about the large amount of data transfers on my service that was exceeding the normal home user profile. In those days I believe we could run a static IP address, but most ISPs are only used to personal accounts running Apple or Windows based computers and I am not the person to share the number or types of computers that I run with my ISP. 

At any rate after digging a little deeper I found that my Indigo had been hacked and I had 1000s of email messages advertising Viagra sales and god knows what else. My hard drive was probably very close to full. I think I had noticed the computer was slowing down unexpectedly maybe due to the lack of hd space left. So I cleaned up the files and turned off sendmail which was probably the culprit.

Now the internet has ostensibly become more secure for home networks running cable modems and more advanced routers offering firewalls. I would like to ask is my old system still vulnerable to attack or is my router firewall enough to keep it isolated from attack. I know that NFS is not secure on these old computers. What recommendations if any would you suggest that I implement to ensure it is secure from attack? I also do not want this old computer to provide a gateway to my other computers with sensitive data. I don't think I have Gauntlet in my software collection. I would like to be able to print to my networked printer, browing pretty much sucks, but also being able to access the Indigo from my MacBookPro or LInux systems would be nice.

Thanks for reading and any advice. I hope this is not to big a question to ask, advice on what SGI manuals to read would be good. I have a rudimentary knowledge of networking, but not much experience with IRIX networking. I will start with the networking manuals on my own as well.