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Oracle SBC Security Guide
NN 6300 724k CAM 16G memory – copper single GigE
Platform
NN 6300
CAM
724K
Memory
16G
Software Release
7.1.2
Configuration Model
PBRB
SSNHTN
SNB
media-manager
max-signaling-bandwidth
2500000
max-untrusted-signaling
1
1
1
min-untrusted-signaling
1
1
1
tolerance-window
30
realm-config (peer)
access-control-trust-level
low
average-rate-limit
0
invalid-signal-threshold
1
maximum-signal-threshold
4000
untrusted-signal-threshold
1
realm-config (core)
access-control-trust-level
high
average-rate-limit
0
invalid-signal-threshold
0
maximum-signal-threshold
0
untrusted-signal-threshold
0
Observations/Limitations
The settings outlined in this appendix are beneficial when facing malicious or non-malicious flood
attacks, such as a REGISTER avalanche following a network outage. By limiting the amount of untrusted
traffic to the SBC, the registration rate allowed will be throttled and the SBC will not be overrun by the
high rate of registrations. However, there is an opportunity cost between the level of protection against a
DDoS flood attack and the convergence time for this type of avalanche condition. For example, raising
the percentage of untrusted bandwidth allowed will inevitably allow more untrusted traffic to traverse the
SBC, and minimize the convergence time. The opportunity cost here is higher CPU usage during the
flood, a result of higher demand on the processor due to the increased level of registrations it’s required to
process.
Additionally, when set as an option in the sip-configuration, reg-overload-protect requires the SBC
temporarily promote a registering endpoint upon receipt of a 401/407 response from the “real” registrar.
This temporary promotion is in advance of the real and final promotion, which takes place following the
200 OK response to a REGISTER request containing authentication credentials. During a registration
- SECURITY GUIDE 1
- Contents 3
- Related Documentation 7
- Part 1: Overview 8
- Figure 1: Net-SAFE Framework 9
- General Security Principles 10
- Monitor System Activity 11
- Session Border Controller 13
- Unified Session Manager 14
- Core Session Manager 15
- Session Router 16
- Realm Design Considerations 16
- Management Interfaces 17
- Passwords 18
- Boot Flags 18
- System ACLs 19
- Telnet/SSH 19
- FTP/SFTP 19
- GUI Management 19
- Resiliency 20
- Physical Link Redundancy 21
- Part 3: Security Features 22
- Security Specific Licenses 24
- Features 26
- Configuring AAA Integration 27
- SIP Interface Security 28
- Service ACLs 29
- TLS for SIP 31
- IPsec for SIP 33
- Call Admission Control (CAC) 34
- Media Policing 35
- DoS/DDoS Prevention 35
- Attack Tool Prevention 36
- Lawful Interception 36
- Part 4: Appendices 37
- Appendix B: Port Matrix 38
- Configuration Models: 40
- Supported platforms 40
- Configuration Parameters 40
- Realm Configuration 41
- SIP Interface 41
- Observations/Limitations 49
- Overview 61
- Deployment Archetypes 61
- Scanner Mitigation 63
- Peering Environments 68
- IDS License Details 70
- Dependencies 70
- Statistics 71
- SNMP MIB OIDS 71
- SNMP Traps 72
- Constraints Limiting 75
- Session-Constraints 75
- Rate constraints 76
- Message Rejections 78
- SNMP support 79
- Log Action 79
- Blacklist Table Maintentance 86
- SNMP OIDs 88
- System Management Statistics 88
- Realm Statistics 89
- Environmental Statistics 90
- Enterprise SNMP Traps 90
- SNMP Traps in HA environment 93
- Appendix I: Syslog 94
- Call Detail Records (CDR) 102
- Oracle SBC Security Guide 103
- System Statistics 106
- Application Statistics 106
- Introduction 108
- SRTP Topologies 108
- Requirements 110
- Design Aspects 111
- Secured/Unsecured Network 114
- Troubleshooting 122
- References 142
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