Gia traffic dedomenwn

Kostas Asvestas asvestas at orfeas.it.teithe.gr
Tue Feb 18 19:10:27 EET 1997


On Tue, 18 Feb 1997, Lucas Maneos wrote:

> > 	Mpa apla kovw olo to ICMP kai isihazw :)
> Mh... :-(
> Parabiazeis ta RFC 1122, 1812 (an xrhsimopoieis to linuxokoyto san inet
> gateway) kai 1925...
  Kai pou na kseres posa akoma paraviazw :)

> Kai mporei na soy dhmioyrghsei kai alla problhmata - px: jekinas ena ftp
> session, gia kapoio logo kati apo thn allh meria soy stelnei ICMP
> ECHO_REQUEST, den pairnei pote apanthsh kai apofasizei na se uevrhsei
> 'unreachable' - voila, paei to ftp... H, jekinas ftp session, h allh
> meria einai unreachable, alla esy den to mauaineis pote (giati petas sto
> patvma to ICMP [HOST|PORT|NET] UNREACHABLE packet kai perimeneis
> na kanei timeout to TCP stack...
  Exeis apolito dikio. Alla ta ftp mou ta kanw kata koro apo monima
sindedemena mixanimata sto diktyo. Kai meta koutsa-koutsa spiti :)

> > 	Ta connect mou den einai kai toso kala opote kai ena aplo ping
> > mporei na me "mpoukwsei".
>
> Xm, ma ta perissotera ICMP packets einai tragika mikra - h monh ejairesh
> einai otan exeis kapoion kakohuh apo thn allh meria, alla s'ayth thn
> periptvsh einai nomizv kalytero na blockareis OLA ta protocola apo thn
> IP d/nsh toy.
  Ma ta exw mplokarei ;) Exw ena mizero 386 gia gateway pou kai na mou to
xakaroun den trexei kai tipota kai to pentium vgainei eksw mesw
masquarating. Opote mono ean kanw redirect mia porta mporei kapoios na
mpei sto mixanima mou. To mono pou mporei na mou mpoukwsei
i na mou riksei tin grammh einai to ping flood ( me megala paketa ).

> > PS: Exei dokimasei kaneis to MRTG? ( Multi Router Traffic Graffer )
>
> Tsoy - den exv toso megalo LAN vste na moy einai xrhsimo :-).  Ayto poy exv
> dokimasei, kai me exei bohuhsei poly gia troubleshooting klp einai to
> scotty+tkined.

  Mpa to mrtg to thelw gia routers kiriws ( kai genika oti perifereiako
diktiou pou exei SNMP II ). Genika ean deis kana kalo Network Management
Software fisika free vale mia fwnh. Oi perissoteroi pelates antidroun
perierga otan akoun times apo NMS paketa :)


Kostas Asvestas.

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