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| Subject: | x.25 link running HDLC does not need firewall? |
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| Date: | 25 Aug 2004 19:29:25 -0000 |
You gurus out there please kindly enlighten me on whether we need a firewall for this scenario and if so, what product would support this: The bank I work for has a x.25 HDLC serial point to point link to a stock exchange. The link is via leased lines provided by a vendor, which goes through 2 telecom exchanges between us and destination. The connection between our application server (solaris 2.6) and the stock exchange is initiated by us. This application server is connected to the rest of my internal network via tcp/ip. This solaris server is not hardened. Without a firewall in between the stock exchange and my application server, would there be a way an attacker from the stock exchange, or from the telco line vendor, could potentially hack into my solaris box or tunnel through to my internal tcp/ip lan? Any specific examples would be greatly appreciated!
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