Chapter 16 - 01 - Discuss Network Troubleshooting - 07_ocred_fax_ocred.pdf

Certified Cybersecurity Certified Cybersecurity Technician Technician Exam 212-82...

Certified Cybersecurity Certified Cybersecurity Technician Technician Exam 212-82 Exam 212-82 Network Troubleshooting Network Troubleshooting Troubleshooting Troubles hooting Network Issues: Upper-la Network Issues: yer Faults Upper-layer Faults Common Common problems problems Rectification Rectification Steps Steps Firewall blocking Firewall blocking the the flow flow ofof incoming incoming and and Move the host Move the the network host inin the that itit such that network such outgoing traffic outgoing traffic bypasses firewall blocking the firewall bypasses the the traffic. blocking the traffic. Replace Replace the the server server that that isis down down with with aa Server oror service Server service down down temporary temporary server server toto continue continue the the services. services. Authentication process Authentication process issue issue resulting resulting inin the the Use Use software software toto deploy deploy checks checks for for inability toto access inability access aa service service between between thethe host host LR WU WU W authentication-related issues. authentication-related issues. and server and server Issues with Issues with software software compatibility compatibility ofof the the Upgrade the Upgrade devices such the devices they are that they such that are devices, version devices, version mismatches, mismatches, etc. etc. and have compatible and compatible same version. the same have the version. Copyright Copyright ©© by by EC EC I, All Rights Reserved. All Rights Reserved. Reproduction Reproductionisis Strictly Strictly Prohibited Prohibited. ting Network Issues: Upper-layer Faults Troubleshooting Troubleshoo and If the user has already checked the physical connectivity, local connectivity, IP connectivity, and occurred routing issues but was unable to find a fault, then there is a chance that the fault has occurred in the transport- and application-layer application-layer protocols. The following are potential reasons for the occurrence of faults: ®== The data connection is not working. » The firewall/packet filter prevents the incoming and outgoing traffic. =» A specific service on the server is not working. =» There are authentication and access concerns between the client and server host. *» There are issues related software oror mismatch of its version related to the incompatibility of software between the source between the source and host. destination host. and destination Module Module 1616 Page Page 1964 1964 Certified Technician Copyright Cybersecurity Technician Certified Cybersecurity EG-Gouncil Copyright © © byby EC-Gouncil Reproduction isis Strictly Reserved. Reproduction Rights Reserved. AllAll Rights Prohibited. Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 Network Troubleshooting The following table outlines rectification steps based on the category of the fault. Common Problems Rectification Steps Firewall blocking the flow of incoming Move the host in the network such that it and outgoing traffic bypasses the firewall blocking the traffic. Service/server down Replace the server that is down with a temporary Service/server down - 4 server to continue services. Authentication process issue resulting in Use software to deploy checks for the inability to access services between authentication-related issues. the host and server Issues with the software compatibility of | Upgrade the devices such that they are devices, version mismatches, etc. compatible and have the same software version. Table 16.2: Rectification Steps Based on the Category of the Fault Module Module 16 Page 1965 Certified Cybersecurity Technician Certified Cybersecurity Technician Copyright Copyright ©© by EG-Council EG-Gounell All All Rights Reserved. Reproduction Reproduction isis Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 Network Troubleshooting Troubleshooting Network Issues: Wireless Network