TCP/IP Gurus

[Iakwbos Triantafilloy]

Panayotis Tsiamis wrote:

> Exo apo ena sigekrimeno host to exeis minima
> sta logfiles mou:
>
> TCP: Treason uncloaked! Peer XXX.XXX.XXX.XXX:10805/XXX shrinks window 
> 2207195809:2207197189. Repaired.
> .
> .
> .
> TCP: Treason uncloaked! Peer XXX.XXX.XXX.XXX:10805/XXX shrinks window 
> 2207195809:2207197189. Repaired.
>
>
> Pistebo oti ofilete se kapio kako configuration firewall.
> (Pithanos den afinei ta ICMP packeta na perasoun)
>
> Exei sinantisei kapios idia katastasi kai an nai pia itan i aitia
> kai pos ti diorthose.
>
> PS: Don't answer with copy&paste parts from Stevens book
>
>

Ayto pou blepeis einai gnwsto ws "shrinking window" sto TCP. Ousiastika 
ayto pou ginetai einai oti ena host pou paizei me TCP kanei advertise 
ena megalo window kai sto kapaki kanei advertise ena mikrotero window 
xwris na exei parei arketa data. (blepe RFC 793 for more info). Ayto 
einai strongly discouraged practice by the way.

Me poly apla logia:

To remote host ekei pou stelnei apofasizei na mikrinei to window xwris 
na to "syzhthsei" prwta me to diko sou mhxanhma. To mynhma ayto apla 
exei enhmerwtikh shmasia kai ousiastika leei oti sto linuxaki sou den 
aresei ayto pou ginetai, alla to anexetai kai synexizei.



I.T.