Supplementary Services no supplementary-service sip refer SIP-to-SIP Basic Functionality allow-connections sip to sipīy default, IOS/IOS-XE voice devices do not allow an incoming VoIP leg to go out as VoIP. Media bulk-stats enables the control plane to poll the data plane for bulk call statistics. Media Statistics enables media monitoring on the local gateway. IP addresses must match the IP of hosts the outbound-proxy resolves to in tenant 200 Other IP addresses may need to be configured on other interfaces for example, your Unified CM addresses may need to be added Your longer term configuration overhead, because we cannot guarantee that the addresses of the Webex Calling peers will remain fixed, and you would need to configure your firewall for the peers in any case. This is because the firewall already protects you from unsolicited inbound VoIP. If your LGW is behind a firewall with restricted cone NAT, you may prefer to disable the IP address trusted list on the Webex Calling-facing interface. This CLI allows the admin to change the value to accommodate network conditionsĪnd detect connection failures with the Access SBC much faster). To the next available Webex Calling Access SBC. (LGW takes 20 seconds to detect the TLS connection failure before it attempts to establish a connection Range is between 5 and 20 seconds and theĭefault is 20 seconds. (IOS-XE 17.3.2 and later) Set timers connection establish tls. Set tcp-retry count to 1000 (5 msec multiples = 5 seconds). The crypto trustpoint is needed for TLS to work even though a local client certificate (for example, mTLS) is not requiredĭisable TLS v1.0 and v1.1 by enabling v1.2 exclusivity. LocalGateway(config)# ip name-server 8.8.8.8Įnable TLS 1.2 Exclusivity and a default placeholder Trustpoint:Ĭreate a placeholder PKI Trustpoint and call it sampleTPĪssign the trustpoint as the default signaling trustpoint under sip-uaĬn-san-validate server is needed to ensure that the local gateway establishes the connection only if the outbound proxy configured on the tenant 200 (described later) matches with CN-SAN list received from the server. #DOWNGRADE CISCO IOS XE 16 TO IOS 12 SOFTWARE#The company previously removed a similar account from Cisco PCP, a software application that can be used for the remote installation and maintenance of other Cisco voice and video products.Enter configuration commands, one per line. This is the second backdoor account that Cisco removed from its software this month. #DOWNGRADE CISCO IOS XE 16 TO IOS 12 CODE#The patches also include two fixes for two other critical flaws -two remote code execution bugs ( CVE-2018-0151 and CVE-2018-0171). #DOWNGRADE CISCO IOS XE 16 TO IOS 12 PATCH#The patch for CVE-2018-0150 is one of the 22 security updates the networking software giant published yesterday. The account grants the attacker a " privilege level 15 access," a term used to describe high-privileged accounts. This "backdoor" vulnerability ( CVE-2018-0150) is considered critical and has a severity score of 9.8 out of 10.Īttackers can log into this account remotely, and don't necessarily need physical access to the device. #DOWNGRADE CISCO IOS XE 16 TO IOS 12 PASSWORD#If they'd like to keep the accunt, admins can also log into their device via their regular admin user and utilize that account to change the cisco's account default password with one of their own choosing. If patching is not possible, mitigations existīesides the software patches made available on the Cisco customer portal, device admins can remove the account by typing: no username cisco Since this account only affects v16.x versions and uses the company's name for the username, this appears to have been accidentally left over from IOS XE's development or testing phase. The company says the "undocumented user account" only impacts devices running Cisco XE Software 16.x -an operating system deployed mostly with Cisco ASR routers and Catalyst switches.Ĭisco says devices running IOS XE 16.x come with a hidden default account named "cisco," and a static password that Cisco didn't reveal to avoid future exploitation attempts.Ĭisco devices don't usually come with default accounts, and network admins must set up an account during the device's first boot-up. Cisco removed today a backdoor account from its IOS XE operating system that would have allowed a remote attacker to log into Cisco routers and switches with a high-privileged account.
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