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> Probleme YM, Iarasi

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Marty
post 5 Sep 2005, 11:24
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Problema se prezinta in felul urmaritor: intr-o zi m-am trezit ca nu mai pot accesa YM. OK, traiasca metodele alternative! Toate bune si frumoase, plec in concediu. Cel care m-a inlocuit si-a adus si computerul de la "centru". Uitind sa-i spun de modalitatea prin care poti folosi YM, imi faceam mustrari de constiinta. Ma intorc din concediu si-l gasesc bagat gramada pe YM, fara nici o jena. Il intreb cum a facut sa foloseasca YM si-mi zice ca.... n-a facut nimic, n-a folosit nici o "metoda alternativa", etc.
Intrebare legitima: se poate sa blochezi un port in functie de MAC Address ? Sau ce mama ciorilor mi-au facut astia de eu nu pot folosi YM fara smecherie si respectivul poate ?


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ghc
post 5 Sep 2005, 11:28
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Filtrarile se pot face pe MAC, IP, username, in principiu pe orice informatie din packetul de date.
Totul depinde de ce firewall se foloseste.


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DRE
post 5 Sep 2005, 11:32
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De asemenea, foarte important este MTU... Ia un program numit TCP/IP Optimizer si poti afla valoarea recomandata a MTU.


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Marty
post 5 Sep 2005, 11:34
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IP-ul de retea se aloca dinamic dupa principiul "first came, first served". User in retea nu avem, nu e d-aia cu parola si username. Singurele informatii de care s-ar putea lega ar fi MAC address si seria de la Win.


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Marty
post 5 Sep 2005, 11:37
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QUOTE(DRE @ 5 Sep 2005, 11:32)
De asemenea, foarte important este MTU... Ia un program numit TCP/IP Optimizer si poti afla valoarea recomandata a MTU.
*



WTF is MTU, la ce foloseste el si cum fac sa ne intilnim?
P.S.: Sunt aproximativ paralel cu tehnologia de tipul asta!


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ghc
post 5 Sep 2005, 11:44
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IP-ul se poate aloca dinamic (aka DHCP) in functie de MAC tongue.gif
Asta ofera o securitate sporita, adica nu poate veni oricine sa-si bage cablu de retea in fund la un laptop.


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Marty
post 5 Sep 2005, 11:49
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Colegul meu a zis ca s-a legat la reteaua de aici copiind setarile din compul meu. Oricum, MAC-ul era diferit, asta e clar.


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andu911
post 5 Sep 2005, 12:23
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Schimba MAC.


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Marty
post 5 Sep 2005, 12:25
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QUOTE(andu911 @ 5 Sep 2005, 12:23)
Schimba MAC.
*


No comment!


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andu911
post 5 Sep 2005, 12:29
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Te duci in Local Network Connection. Acolo dai click dreapta pe Local Area Connection. Properties. Configure. Advanced. Network Address. Bifezi Value. Acolo bagi alt MAC ...poti pune spre ex : 000AE6B9C5AD sau ce vrei tu...numai sa folosesti lietere si cifre si sa fie din 12 caractere.

In server probabil cineva a blocat anumite porturi de la macul tau. E singura explicatie, in cazul in care nu e de la tine din PC. Adica vreun firewall setat aiurea, in special ala care se instaleaza automat cu Service Pack 2...

Presupun ca ai XP..

This post has been edited by andu911: 5 Sep 2005, 12:33


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litza
post 5 Sep 2005, 12:31
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google.gif http://www.softpedia.com/get/Tweak/Network-Tweak/CMAod.shtml

Ideal ar fi sa-ti notezi undeva MAC-ul current. Nu de alta dar intr-o retea MAC-urile trebuie sa fie diferite si daca ai norocul sa nimeresti unul existent ...


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andu911
post 5 Sep 2005, 12:34
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QUOTE(litza @ 5 Sep 2005, 12:31)
google.gif http://www.softpedia.com/get/Tweak/Network-Tweak/CMAod.shtml

Ideal ar fi sa-ti notezi undeva MAC-ul current. Nu de alta dar intr-o retea MAC-urile trebuie sa fie diferite si daca ai norocul sa nimeresti unul existent ...
*



I0-am dat macul meu, eu nu sunt cu el in retea tongue.gif
N-are nevoie de program daca face cum i-am zis eu...

Edit: daca foloseste unu existent, ii vor cadea toate conexiunile la net...i se vor reconecta, iar vor cadea...si tot asa...

This post has been edited by andu911: 5 Sep 2005, 12:37


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Marty
post 5 Sep 2005, 12:37
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QUOTE(andu911 @ 5 Sep 2005, 12:29)
Presupun ca ai XP..
*


Am 98. blush.gif


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andu911
post 5 Sep 2005, 12:39
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http://www.ocmelbourne.com/tutorials/MACaddr/MACaddr04.shtml


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Marty
post 5 Sep 2005, 12:49
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Exact si fix mielu', nu merge nici asa! sad.gif Deci nu e MAC-ul.


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litza
post 5 Sep 2005, 12:52
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Am vaga impresie ca trebuie restart la 98 sa iti ia in considerare noile setari de net.


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Marty
post 5 Sep 2005, 12:52
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Pai s-a cerut singur.


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adso
post 5 Sep 2005, 12:58
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adica tie cu 98 nu-ti merge si probabil aluia, cu 2000 sau xp ii merge?


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Marty
post 5 Sep 2005, 13:00
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N-avem licente decit pentru '98. De unde rezulta ca si el are tot '98.


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DRE
post 5 Sep 2005, 13:08
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http://www.winguides.com/registry/display.php/280/


Aici ai toate detaliile despre MTU (Maximum Transmision Unit). Am inteles ca ai '98, dar incearca sa il schimbi folosind instructiunile de aici. In principiu ar trebui sa fie la fel. In cazul tau, 80% e de la MTU.


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IRONICK
post 5 Sep 2005, 13:16
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MTU-ul nu are legatura cu YM

Totul depinde de cum se face routarea la tine in retea.


http://www.google.ro/search?num=100&hs=yEE...aut%C4%83&meta=


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Marty
post 5 Sep 2005, 13:20
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OK, IRONICK, cum ocolesc blocajul? Asta poti gasi ? smile.gif


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DRE
post 5 Sep 2005, 13:21
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Nici nu am sustinut ca are legatura cu Yahoo. Cine vorbeste de MTU, vorbeste de routing... wink.gif In general nu vorbesc sa ma aflu in treaba. Omul a zis ca e paralel, nu avea rost sa ii umplu capul cu detalii tehnice.


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IRONICK
post 5 Sep 2005, 13:29
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QUOTE(Marty @ 5 Sep 2005, 14:20)
OK, IRONICK, cum ocolesc blocajul? Asta poti gasi ? smile.gif
*



Daca esti intr-o retea chioara (fara vlan-uri, etc ....) poti folosi un packet sniffer si sa vezi ce face prin retea respectivul. Si asa poti sa iti dai seama cum foloseste el YM.
PS. Vezi ca este interzis sa folosesti asa ceva ( rolleyes.gif ) http://www.ethereal.com

QUOTE(DRE @ 5 Sep 2005, 14:21)
Cine vorbeste de MTU, vorbeste de routing... wink.gif
*



Parca routarea nu intra in aceeasi layer OSI 7 cu MTU-ul ? Sau ma insel ?

This post has been edited by IRONICK: 5 Sep 2005, 13:58


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Marty
post 5 Sep 2005, 14:10
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DRE, am rulat programelul ala, am dat Apply Changes si am restartat. Aceeasi problema!

P.S.: Colegul meu foloseste 2000.


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Boss
post 5 Sep 2005, 15:22
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Marty, daca nu merge cu ipul pe care il ai tu, baga ipul de la server pe portul 3100 sau ipul de la gateway la proxy (la yahoo messenger), de ex. 193.25.xxx.1:3100 si iti merge tongue.gif.
Se pot opri porturile din server si din motive de protectie , majoritatea sunt inchise.


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Marty
post 5 Sep 2005, 15:27
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Toate porturile sunt taiate! Am incercat 3128 si e inchis. Pot face misculatii doar pe portul 80.
Ideea e ca in momentul in care ai iesit pe internet, ai un singur IP, cel al serverului, indiferent de la ce statie de lucru faci treaba asta.


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Boss
post 5 Sep 2005, 15:29
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Esti acasa sau la servici ?


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Marty
post 5 Sep 2005, 15:30
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Sunt la servici, de acasa nu am probleme d-astea!


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Boss
post 5 Sep 2005, 15:32
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Daca erai acasa, mergea faza cu 3100, la servici, e mai greu.....si 98`u ala e dus rau de tot la chestii d`astea....vezi sa nu fie vreoun firewall ceva, sa n-ai instalate nu stiu ce protocoale, nu stiu, zic si eu...cu 98-u n-am mai lucrat de vreo 3 ani.


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