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Hiding old HP server behind proxy/firewall

We have an old HP server which is running a legacy application.    Every now and then the network interface will totally freeze.  Our support provider says it is because of stray traffic or somebody running a scan on the IP address.   Running any kind of network discovery tools or port mapper against the server will cause the interface to freeze.

We are careful about what we run against it but now and then corporate submits a scan looking for unauthorized computers/software and kills the interface.  

It was suggested that we place it behind a firewall / proxy and block all but the required ports to see if this would help.  

Has anyone tried anything like this?   It would be great to place something inline so we would not have to change any IP addresses.
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qvfps
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qvfps
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giltjrCommented:
What OS is this server running?
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qvfpsAuthor Commented:
I think it is HP-UX
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giltjrCommented:
HP-UX should have iptables, which you can setup to only allow the traffic you need in and out and block all other traffic.  

This may be easier to do instead of setting up another box to sit in front of the HP-UX box.
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qvfpsAuthor Commented:
I would have to check.   It is sort of a black box we don't touch and the support company has just said don't run scans against that IP.
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qvfpsAuthor Commented:
It is running MPE\IX
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giltjrCommented:
Oh man.   Umm, you know the last time I worked with a MPE system it didn't  have TCP/IP.  We were running HP-3000/44's, I think we were running MPE-V.

Get a cheap PC, two NIC's, Linux and learn iptables.
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