IOS Based IPS

Is it any good? I understand the configuration need @ the CCNA:S level, but I can’t seem to get it actually react to ANYTHING! I tried massive port scans, DOS tools, generating lots of traffic (opened up 1000 simultaneous streams w/iperf) and various other goodies = nothing. I have it setup on all interfaces, have attacked from the LAN, DMZ, and outside – Even opened everything up to one of the DMZ boxes (It’s in a lab, not connected to the internet), NOTHING! Signatures are active, nothing hits. I’m contemplating opening a VMWare image up to the outside world in the DMZ and letting everything in but I don’t have enough faith at this point that the IPS will actually show me anything!

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Comments

mikej412

Are you sure the signatures compiled correctly?
show ip ips signature count

Did you configure from the command line or SDM?

pitviper

mikej412 wrote: »

Are you sure the signatures compiled correctly?
show ip ips signature count

Did you configure from the command line or SDM?

Appears so – tried via CLI and SDM, current config is SDM:

c2821_SEC#sh ip ips sig count

Cisco SDF release version S409.0
Trend SDF release version V0.0

Signature Micro-Engine: multi-string: Total Signatures 13
multi-string enabled signatures: 9
multi-string retired signatures: 7
multi-string compiled signatures: 6

Signature Micro-Engine: service-http: Total Signatures 712
service-http enabled signatures: 149
service-http retired signatures: 578
service-http compiled signatures: 134
service-http obsoleted signatures: 2

Signature Micro-Engine: string-tcp: Total Signatures 1594
string-tcp enabled signatures: 639
string-tcp retired signatures: 1347
string-tcp compiled signatures: 247
string-tcp obsoleted signatures: 21

Signature Micro-Engine: string-udp: Total Signatures 78
string-udp enabled signatures: 2
string-udp retired signatures: 77
string-udp compiled signatures: 1
string-udp obsoleted signatures: 1

Signature Micro-Engine: state: Total Signatures 33
state enabled signatures: 16
state retired signatures: 20
state compiled signatures: 13

Signature Micro-Engine: atomic-ip: Total Signatures 341
atomic-ip enabled signatures: 94
atomic-ip retired signatures: 275
atomic-ip compiled signatures: 66

Signature Micro-Engine: string-icmp: Total Signatures 3
string-icmp enabled signatures: 0
string-icmp retired signatures: 3

Signature Micro-Engine: service-ftp: Total Signatures 3
service-ftp enabled signatures: 1
service-ftp retired signatures: 2
service-ftp compiled signatures: 1

Signature Micro-Engine: service-rpc: Total Signatures 76
service-rpc enabled signatures: 44
service-rpc retired signatures: 50
service-rpc compiled signatures: 26

Signature Micro-Engine: service-dns: Total Signatures 39
service-dns enabled signatures: 27
service-dns retired signatures: 10
service-dns compiled signatures: 29
service-dns obsoleted signatures: 1

Signature Micro-Engine: normalizer: Total Signatures 9
normalizer enabled signatures: 8
normalizer retired signatures: 1
normalizer compiled signatures: 8

Signature Micro-Engine: service-smb-advanced: Total Signatures 49
service-smb-advanced enabled signatures: 42
service-smb-advanced retired signatures: 29
service-smb-advanced compiled signatures: 20

Signature Micro-Engine: service-msrpc: Total Signatures 31
service-msrpc enabled signatures: 26
service-msrpc retired signatures: 24
service-msrpc compiled signatures: 7
service-msrpc obsoleted signatures: 1

Total Signatures: 2981
Total Enabled Signatures: 1057
Total Retired Signatures: 2423
Total Compiled Signatures: 558
Total Obsoleted Signatures: 26

pitviper

Is it possible that I don't have the correct sigs enabled for the attacks that I'm testing?

pitviper

Disabled all sigs, turned them back on, now everything is working = lots of beautiful “UDP Bomb” messages on the syslog server. Changed the action to “deny attacker inline” and it worked like a charm – Also killed my SDM connection since I was managing from the same PC.

Now it's time to feed an XP VMWare image to the lions