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Oracle SBC Security Guide
3. It receives too many signaling messages from an untrusted source within the configured time
window (untrusted-signal-threshold in the realm or static ACL)
4. A trusted endpoint exceeds the call admission controls and the cac-failure-threshold defined in an
ACL (the call admission control limits are defined in media profiles)
5. An untrusted endpoint exceeds call admission controls and the untrust-cac-failure-threshold
defined in an ACL
The SBC will promote an endpoint if:
1. It received a 200 OK response to a registration
2. The registration overload protection (reg-overload-protect) option has been set globally in the sip-
config element (this is temporary, and only if a 401 or 407 response is received)
3. The deny-period has expired
Statistics
Each promotion and demotion event, between trusted, untrusted, and deny queues is counted and kept as
an ACL statistic. These counts are maintained separately for SIP and MGCP signaling applications.
Statistics for ACL status and operations can be seen using the ACLI commands show sipd acls and show
mgcp acls.
ACMESBC# show sipd acls
16:25:48-180
SIP ACL Status -- Period -- -------- Lifetime --------
Active High Total Total PerMax High
Total Entries 0 0 0 0 0 0
Trusted 0 0 0 0 0 0
Blocked 0 0 0 0 0 0
ACL Operations ---- Lifetime ----
Recent Total PerMax
ACL Requests 0 0 0
Bad Messages 0 0 0
Promotions 0 0 0
Demotions 0 0 0
Trust->Untrust 0 0 0
Untrust->Deny 0 0 0
SNMP MIB OIDS
The ACL statistics counters described above are also available for SNMP polling under APSYSMGMT-
MIB -> acmepacketMgmt -> apSystemManagementModule -> apSysMgmtMIBObjects ->
apSysMgmtMIBGeneralObjects
apSysSipEndptDemTrustToUntrust (.1.3.6.1.4.1.9148.3.2.1.1.19)
o Global counter for SIP endpoint demotions from trusted to untrusted.
apSysSipEndptDemUntrustToDeny (.1.3.6.1.4.1.9148.3.2.1.1.20)
o Global counter for SIP endpoint demotions from untrusted to denied.
apSysMgcpEndptDemTrustToUntrust (.1.3.6.1.4.1.9148.3.2.1.1.21)
o Global counter for MGCP endpoint demotions from trusted to untrusted.
apSysMgcpEndptDemUntrustToDeny(.1.3.6.1.4.1.9148.3.2.1.1.22)
o Global counter for MGCP endpoint demotions from untrusted to denied.
- 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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