• RSS
  • Twitter
  • FaceBook

Welcome to ISAserver.org

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

FWX_E_TCP_NOT_SYN_PACKET_DROPPED

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [ISA 2006 Firewall] >> General >> FWX_E_TCP_NOT_SYN_PACKET_DROPPED Page: [1]
Login
Message << Older Topic   Newer Topic >>
FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 9.May2007 10:25:18 AM   
xcoder

 

Posts: 4
Joined: 9.May2007
Status: offline
Hi;

I began to use ISA server 2006 and zywall firewall

(ADSL modem > Zywall > isa 2006 > intranet)

When I want to login yahoo.com..

Isa Initiated a Connection to  yahoo.com's ip and download some of page

then isa was closed connection before page not complately display

at last localhost try to connect yahoo again

but isa was deny connection
(isa said the reason is FWX_E_TCP_NOT_SYN_PACKET_DROPPED) ??????

Thanks..

< Message edited by xcoder -- 9.May2007 10:26:33 AM >
Post #: 1
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 20.May2007 11:18:54 AM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Is there a rule allowing access to the site?

Are the clients configured to use HTTP 1.1 through proxy connections?

Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to xcoder)
Post #: 2
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 21.May2007 5:02:36 AM   
xcoder

 

Posts: 4
Joined: 9.May2007
Status: offline
Generally My client aren't configured to use HTTP 1.1 proxy



there is only one rule for access to the site. I try to direct access but notting change.
this is my logs.. Why localhost(-External-) try to connect ??

I dont use router because I have only one subnet for internal network..

192.168.1.myip = internal computer/network
192.168.3.isa     = external network/isa





Thanks..


(in reply to xcoder)
Post #: 3
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 22.May2007 8:36:02 AM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Enable HTTP 1.1 through proxy connections and see if that fixes the problem.
HTH,
Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to xcoder)
Post #: 4
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 22.May2007 9:28:39 AM   
xcoder

 

Posts: 4
Joined: 9.May2007
Status: offline
quote:

ORIGINAL: tshinder

Enable HTTP 1.1 through proxy connections and see if that fixes the problem.
HTH,
Tom


I enable http1.1 proxy but nothing change :(


I saw -isa external ip goes to internet all my web request- in my log.. is it normal?

Thanks

< Message edited by xcoder -- 22.May2007 9:30:19 AM >

(in reply to tshinder)
Post #: 5
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 23.May2007 11:07:23 AM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
In its role as Web proxy, the ISA Firewall does generate a new request.

This ISA firewall has a least two NICs, right?

Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to xcoder)
Post #: 6
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 24.May2007 1:55:59 AM   
xcoder

 

Posts: 4
Joined: 9.May2007
Status: offline
Yes there is two NICs.
I tryed it on webproxy,securenat and firewall client, this result code(Not sycn) came all times..
But securenat client to reach yahoo.

(in reply to tshinder)
Post #: 7
RE: FWX_E_TCP_NOT_SYN_PACKET_DROPPED - 25.May2007 12:35:00 PM   
tshinder

 

Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Perhaps a bug in the Zywall? Is the definition of the ISA Firewall's internal network correct and the internal and external interfaces are on different network IDs?

Tom

_____________________________

Thomas W Shinder, M.D.

(in reply to xcoder)
Post #: 8

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [ISA 2006 Firewall] >> General >> FWX_E_TCP_NOT_SYN_PACKET_DROPPED Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts