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fX=ĨQnܸfC~9rٳg o.,,Sj#~o qAgφ58W/s܏FpM/!`oA[OgԹ~r0rN=5UҺ}9HVvt40CCC0X02'4gCPF@F@F@F@F@F@F䃹dIENDB`DrXXgg NHome~LT~GliederungDrPgoJoeMTlDrML8DrMD,DrOb<SVDr&5 B0DrObSVDr& 3CG]# Home~LT~Notizen 3CG]axV4B1JThe DiffServ Working Group of the IETF has redefined the ToS octet in the IPv4 and IPv6 header. See the DiffServ Working Group homepage for more information.Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''DrXXDrObuSVDr&TlStandardTlgg JHome~LT~GliederungDrPg JoeMVmRDrML8DrMD,DrObSVDr&_et! Home~LT~Titel_etxV4B1Other common firewall features Home~LT~Titelg* <( ( @'+'DrObSVDr&_eyJ(Home~LT~Gliederung 11_eyJxV4B1Stateful inspectionHome~LT~Gliederung 1g* <( ( @'!Network address translation (NAT)Home~LT~Gliederung 1g* <( ( @'!Authenticaton (VPNs)Home~LT~Gliederung 1g* <( ( @'Dynamic triggersHome~LT~Gliederung 1g* <( ( @'"Reporting, logging and IDS supportHome~LT~Gliederung 1g* <( ( @'"DrXXgg NHome~LT~GliederungDrPgoJoeMTlDrML8DrMD,DrOb<SVDr&5 B0DrObSVDr& 3CG]# Home~LT~Notizen 3CG]axV4B1JThe DiffServ Working Group of the IETF has redefined the ToS octet in the IPv4 and IPv6 header. See the DiffServ Working Group homepage for more information.Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''DrXXDrObuSVDr&TlStandardTlgg JHome~LT~GliederungDrPgeJoeMVmRDrML8DrMD,DrObSVDr&_e! Home~LT~Titel_exV4B1#What can't a network firewall stop? Home~LT~Titelg* <( ( @'+'####DrObSVDr&_exJ(Home~LT~Gliederung 1_exJexV4B1DBad packets that look goodHome~LT~Gliederung 1g* <( (@'A' Denial of service (DoS) attacksHome~LT~Gliederung 1g* <( (@'A' (Well, they can stop them at the firewallHome~LT~Gliederung 2g*<( (@'( ()But then the firewall has just been DoS'dHome~LT~Gliederung 2g*<( (@') )Stupid user tricksHome~LT~Gliederung 1g* <( (@'A' "Things that go around the firewallHome~LT~Gliederung 1g* <( (@'A'" "-Things that don't cross the firewall boundaryHome~LT~Gliederung 1g* <( (@'A'- -DrXXgg NHome~LT~GliederungDrPgJoeMTlDrMLdDrMD,DrMD,DrOb<SVDr&5 B0DrObSVDr& 3CG]#Home~LT~Notizen 3CG]axV4B1LClick to add notesHome~LT~Notizen<( (@'DrXXDrObuSVDr&TlStandardTlgg NHome~LT~GliederungDrPgAJoeMVmRDrML8DrMD,DrOb SVDr&_e! Home~LT~Titel_exV4B1~So you're saying...? Home~LT~Titelg* <( ( @'+'DrObSVDr&_exJ(Home~LT~Gliederung 1o_exJPxV4B1/.It would be nice if all hosts could be securedHome~LT~Gliederung 1g* <( (@'A'. .Network solutions can helpHome~LT~Gliederung 1g* <( (@'A' .Malicious insiders can get by anything you gotHome~LT~Gliederung 1g* <( (@'A'. .)A holistic approach is needed. Including:Home~LT~Gliederung 1g* <( (@'A') )Audits, detection and responseHome~LT~Gliederung 2g* <( (@'  EducationHome~LT~Gliederung 2g* <( (@'  Standards and best practicesHome~LT~Gliederung 2g* <( (@' DrXXgg NHome~LT~GliederungDrPg'JoeMTlDrMLdDrMD,DrMD,DrOb<SVDr&5 B0DrObiSVDr& 3CG]#Home~LT~Notizen  3CG]xV4B1LAN costs are usually only one time capital outlays. This makes it easy to buy more than enough capacity (e.g. Gigabit Ethernet is cheap!)Home~LT~Notizeng* <( (@'A'WAN links can be expensive, but they are coming down. For example, Ameritech is selling its GigaMAN service, essentially gigabit ethernet (1 Gb/s), for less than it would cost for an OC3c (155 Mb/s).Home~LT~Notizeng* <( (@'A'Internet service however is still very expensive in the typical case. Although some new providers have begun to appear with attractive offers (e.g.).Home~LT~Notizeng* <( (@'A'DrXXDrObuSVDr&TlStandardTlgg JHome~LT~GliederungDrPgJoeMVmRDrML8DrMD,DrOb SVDr&_e! Home~LT~Titel_exV4B1~What does DePaul do? Home~LT~Titelg* <( ( @'+'DrOb(SVDr&_exJ(Home~LT~Gliederung 1_exJxV4B1,We stop some obvious stuff in various placesHome~LT~Gliederung 1g* <( (@'A', ,'We're beginning to do more at the edgesHome~LT~Gliederung 1g* <( (@'A'' '+Note: the network will be very fast soon...Home~LT~Gliederung 1g* <( (@'A'+ +(...big firewalls get in the way big timeHome~LT~Gliederung 1g* <( (@'A'( ((Regardless of what you may have heard...Home~LT~Gliederung 1g* <( (@'A'( ()We're better off than we were 2 years agoHome~LT~Gliederung 1g* <( (@'A') )Of course so are the attackersHome~LT~Gliederung 1g* <( (@'A' DrXXgg NHome~LT~GliederungDrPg JoeMTlDrML8DrMD,DrOb<SVDr&5 B0DrOb{SVDr& 3CG]# Home~LT~Notizen 3CG]xV4B1LAN costs are usually only one time capital outlays. This makes it easy to buy more than enough capacity (e.g. Gigabit Ethernet is cheap!)Home~LT~Notizeng* <( (@'A''WAN links can be expensive, but they are coming down. For example, Ameritech is selling its GigaMAN service, essentially gigabit ethernet (1 Gb/s), for less than it would cost for an OC3c (155 Mb/s).Home~LT~Notizeng* <( (@'A''Internet service however is still very expensive in the typical case. Although some new providers have begun to appear with attractive offers (e.g.).Home~LT~Notizeng* <( (@'A''DrXXDrObuSVDr&TlStandardTlgg JHome~LT~GliederungDrPgJoeMVmRDrML8DrMD,DrObSVDr&_e! Home~LT~Titel_exV4B1xFinal thoughts Home~LT~Titelg* <( ( @'+'DrOb3SVDr&_exJ( Home~LT~Gliederung 1_exJxV4B1+Overly secure systems are not at all usefulHome~LT~Gliederung 1g* <( (@'A'+ +$Big border firewalls are obsolescentHome~LT~Gliederung 1g* <( (@'A'$ $/Distributed firewalls are getting a lot of talkHome~LT~Gliederung 1g* <( (@'A'/ //-Firewall vendors of course like this approachHome~LT~Gliederung 1g* <( (@'- -(You should demand open AND secure accessHome~LT~Gliederung 1g* <( (@'( (%We can do it, but it ain't gonna easyHome~LT~Gliederung 1g* <( (@'% %0If we fail, the Internet will become very boringHome~LT~Gliederung 1g* <( (@'0 0DrXXgg NHome~LT~GliederungDrPg{JoeMTlDrML8DrMD,DrOb<SVDr&5 B0DrObgSVDr& 3CG]# Home~LT~Notizen  3CG] xV4B1 ^The following are references to some of the latest work being done to mitigate (D)DoS attacks:Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''PushbackHome~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A'' TracebackHome~LT~Notizeng* <( (@'A'' Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A'' CenterTrackHome~LT~Notizeng* <( (@'A'' Home~LT~Notizeng* <( (@'A''Home~LT~Notizeng* <( (@'A''DrXXDrObuSVDr&TlStandardTlgg JHome~LT~GliederungDrPgHJoeMVmRDrML8DrMD,DrObSVDr&_e! Home~LT~Titel_exV4B1t References Home~LT~Titelg* <( ( @'+'    DrOb`SVDr&_exJ(Home~LT~Gliederung 1_exJ xV4B1 Home~LT~Gliederung 1g* <( ( @'A'Home~LT~Gliederung 1g* <( ( @'A' Home~LT~Gliederung 1g* <( ( @'A'Home~LT~Gliederung 1g* <( ( @'A'Home~LT~Gliederung 1g* <( ( @'A'Home~LT~Gliederung 1g* <( ( @'A'Home~LT~Gliederung 1g* <( ( @'A' Home~LT~Gliederung 1g* <( ( @'A' Home~LT~Gliederung 1g* <( ( @'A' DrXXgg NHome~LT~GliederungDrPgJoeMTlDrMLdDrMD,DrMD,DrOb<SVDr&5 B0DrObSVDr& 3CG]#Home~LT~Notizen 3CG]axV4B1LClick to add notesHome~LT~Notizen<( (@'DrXXDrObuSVDr&TlStandardTlgg NHome~LT~GliederungDrXXWGeneric PrinterSGENPRT PostScriptYVT$mVT$md,,lprdefault_queueSGENPRTPageSize:Letter DrVwP SVDr SVDr:SVDr{{SVDrALayout:SVDr{{SVDr#SVDr SVDr# SVDr0 SVDr1 SVDr3 SVDr4SVDr@SVDr SVDrD SVDrP SVDrQ DrHL DrHL DrHL (S Root Entry!r\V)䰱CompObjEOle persist elements"SfxDocumentInfo uSfxWindowsSfxStyleSheets؞SummaryInformation((StarDrawDocument3$V1L