I manage a seried of Linux servers and we have has a number of successfull DOS attacks recently (SYN_FLOOD). The guys I co-locate with do not know enough about the CISCO equipment to configure measures against this.
Therefore they have given me the login to the Cisco PIX506E which is between me and the Internet.
Although I have read up how to configure things at the command line level I would like to use a GUI.
I tried to download management software from the Cisco website but I keep being blocked - therefore my question is (a) is this software free i.e. can I download it? (b) how do I get unblocked, (c) or where can I buy it if there is a pricing issue.
Also one other question : My office is on the outside of the firewall - is it possible (advisable) to enable the web software whcih I assume is built into the PIX for use from my location. All the documentation in the manuals referes to enabling the web interface towrds the "inside". I have other linux servers on the inside but I cannot get a browser to connect from ther without sitting in the server room.
Thanks - I think I can make a VPN actually so I will try that.
Another Question - in my SYN attacks basically the interface connected to the PIX became totally un-useable. At the same time if I ssh'd onto a 2nd interface (eth1) I could log in and perform linux commands. Although the system was a little slow (i.e. with the top command) it was not completely dead.
What I am thinking is that it was actually the PIX that was overloaded rather than the server. In that case will configuring a limit of 'opening connections' in the PIX help at all ? Alternatively are there other solutions open to me??
Table of ContentsIntroductionVersion HistoryPossible Future
UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...