how to diagnose internet connectivity problems

8/12/2019 How to Diagnose Internet Connectivity Problems

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How To Diagnose Internet Connectivity Problems

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Faculty/StaffResearcherStudentGTF

Diagnosing a failing Internet connection can be fairly complicated. There are a number of differentfactors involved in the chain beteen the softare configuration! the firmare drivers! the hardare

device! the netor" e#uipment! and finally the IS$ uplin". If any one lin" in the chain is bro"en! the

connection on%t or". &oever all the user may e'perience is a eb page on%t load. In other ords!it%s not alays immediately clear specifically hich part is failing. This page ill cover (ust about

everything that could possibly go rong and is organi)ed by the order in hich you should verify

things.

*ontents

D&*$ Settings

D+S Settings

$ro'y Settings

,rd $arty Fireall-alare

+etor" #uipment

Device Drivers&ardare

. D&*$0 verify that you have a proper I$ address from the D&*$ server

1ne of the #uic"est things to chec" that can help narro the problem don is chec"ing the assigned I$

address. First you ill ant to "no the nature of the netor" you%re connecting to. *ommon local

netor" I$s! such as for personal sitches and ireless routers! begin ith 23.45.... or 23.45.6...

1n the university ired netor"! I$ addresses typically begin ith 35.33,... And on the irelessnetor"! 6.3... First e ill ant to chec" our I$ address to see if it is in the proper format. If so!

continue on to the ne't section. If the I$ address loo"s incorrect 7commonly if this is the case it ill

default to a 42.384.... address9 e need to fi' the D&*$ settings. 1ften the simple case is that amanual address has been entered and the configuration needs to be changed bac" to using D&*$.

:indos

Go to start ; run ;


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done. Firefo'%s pro'y settings are located under Tools ; 1ptions ; Advanced ; +etor" ; Settings.

Google chrome%s pro'y settings are located under Tools ; 1ptions ; =nder the &ood ; *hange pro'y

settings

-ac 1S B

$ro'y settings for 1S B can be found in System $references ; +etor" ; Advanced ; $ro'ies.

ou can also chec" local broser settings via the indos method above.>. Third party fireall0 chec" for friendly netor" layer softare

1ften times there can be third party softare such as firealls! antivirus! or antispyare programshere the security level either set incorrectly or simply too high! and it is bloc"ing the outgoing

netor" traffic. This is mostly common on indos machines but it is also possible on 1S B as ell.

=nfortunately theres no one single straightforard method of identifying this problem because there isso much softare out there. 1ne thing you can do on a indos machine is boot into


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memory is cleared and potentially erroneous data is iped.

If a cable modem is involved as ell! perform the same poer cycle on the modem.

*hec" the routers configuration to ma"e sure the D&*$ server is enabled. =sually the router

configuration can be accessed by opening a eb broser and navigating to http0//23.45.. orhttp0//23.45.6.! depending on the type of router. 1nce in the configuration loo" for a setting for the

D&*$ server! and ma"e sure it is running.

*hec" the routers configuration for highsecurity fireall settings. Some routers have an e'tra firealllayer that is usually unnecessary if you are running an operating system level fireall. Try disabling

this or reducing the security level.

*hec" the routers ifi configuration. Sometimes due to interference you may need to change theireless fre#uency 7referred to as


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donloaded driver file7s9.

5. &ardare0 reseat or replace netor" card hardare

It%s alays possible that the hardare itself on the netor" card is faulty. This is especially li"ely if theproblem presents itself seemingly randomly or intermittently. The first thing to try is simply reseating

the card. This is obviously much easier on a des"top computer than a laptop but the same idea applies

to both. This guide ill not go into too much depth on the hardare side of things. If you can getaccess to the card! either by removing the side case of a des"top or the top case of a laptop! try pulling

out the card from its slot completely and then plugging it bac" in firmly. If there are scres! ma"e sure

that they are secured tightly and that the card does not move at all if you iggle it gently.

Failing this! the card may need to be replaced ith a ne one.

Still having problems *ontact the Technology Service Des" for assistance.

how to diagnose internet connectivity problems

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