How to analyze traffic with SPAN feature
Usually when we admin a network, we need to know what are the protocols used more frequently, and why not, discover if someone are using improper P2P software; so we can use SPAN. The Switched Port...
View ArticleHow to decode G.729
I have decided to write this tutorial (only for test purpose) to show how it is simple decode a G.729 stream using SPAN port, Wireshark, VoiceAge G.729 decoder and Audacity software. What is G.729?...
View ArticleIP traffic export: how to mirror traffic on a router
The Switched Port Analyzer (SPAN) feature, which is sometimes called port mirroring or port monitoring, selects network traffic, from a switched port, for analysis by a network analyzer. Unfotunately...
View ArticleSwitchport capture: a good alternative to SPAN port
Do you remember the article “How to analyze traffic with SPAN feature“? The SPAN port is a feature that mirror traffic (on physical or virtual port) to a specific port. In general, behind this...
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Cisco Unity Express Multiple Vulnerabilities
The Cisco Unity Express software contains two important vulnerabilities: CVE ID: CVE-2013-1114: Cisco Unity Express software prior to version 8.0 contains vulnerabilities that could allow an...
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NAT Virtual Interface aka NVI, what is that?!
Not everyone knows that from IOS version 12.3(14)T, Cisco has introduced a new feature called NAT Virtual Interface; NVI removes the requirements to configure an interface as either NAT inside or NAT...
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February 2013: four Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published four important vulnerability advisories: Cisco Unified Communications Manager Multiple Denial of Service Vulnerabilities Cisco...
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Cisco Video Surveillance Operations Manager 6.3.2 – Multiple vulnerabilities
Part of the Cisco Video Surveillance Manager product suite, the Cisco Video Surveillance Operations Manager enables the efficient and effective configuration and management of video throughout an...
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March 2013: seven Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published seven important vulnerability advisories: Cisco IOS Software Zone-Based Policy Firewall Session Initiation Protocol Inspection...
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PBR: Route a packet based on source IP address
Everyone knows that the routing table lists the routes to particular network destinations, but is it possible define the next-hop based on source ip, packet size or other criteria? Obviously yes!...
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April 2013: ten Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published ten important vulnerability advisories: Multiple Vulnerabilities in Cisco NX-OS-Based Products Cisco Device Manager Command...
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Using IP SLA to change routing
Cisco IP SLAs is a part of Cisco IOS that allows Cisco customers to analyze IP service levels for IP applications and services by using active traffic monitoring for measuring network performance. With...
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Reload in X? Why don’t you rollback or replace the configuration?
Do you remember the article ‘How to schedule a reload‘? This feature (reload in ‘x’) is useful when you must apply a critical configuration on a remote device, for instance new route or new acl. In...
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May 2013: two Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published two important vulnerability advisories: Cisco TelePresence Supervisor MSE 8050 Denial of Service Vulnerability Multiple...
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June 2013: five Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published five important vulnerability advisories: Multiple Vulnerabilities in Cisco Web Security Appliance Multiple Vulnerabilities in...
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July 2013: five Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published five important vulnerability advisories: Authenticated Command Injection Vulnerability in Multiple Cisco Content Network and...
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How to save configurations using SNMP
Everyone knows there are software to get the configuration using SNMP; but how can you copy the configuration if you don’t have any tool? Let me explain what is SNMP before show you how to implement...
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August 2013: six Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published six important vulnerability advisories: Cisco Secure Access Control Server Remote Command Execution Vulnerability Multiple...
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WhoisUP v0.2 released!
One year ago, I had published Whoisup v0.1, a script that monitors hosts via ICMP and shows the status in a web page. The script had obtained a good success, so I have decides to continue the WhoisUP...
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September 2013: eleven Cisco vulnerabilities
The Cisco Product Security Incident Response Team (PSIRT) has published eleven important vulnerability advisories: Cisco IOS Software Queue Wedge Denial of Service Vulnerability Cisco IOS Software...
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