TCP Packets in order?
When receiving "TCP Packets" using a network sniffer, are (1) the
packets guaranteed to be in order, or (2) does the application level
need to sort the packets based on the packet sequence number?
From logging it looks like it is (2).
Although open source network sniffer project
(http://sourceforge.net/projects/owns/), seems to make the mistake of
> When receiving "TCP Packets" using a network sniffer, are (1) the
> packets guaranteed to be in order, or (2) does the application level
> need to sort the packet...Packet size TCP/IP
How can I determine the best packet size setting for TCP/IP? Of course I
could do some tests but are there certain limits or things I should know
about this? I can imagine when having large records I could get better
performance using larger packet size.
Also how can I check the setting I use will actual come across the
network (I read some switches or network cards reset the packet size).
[ Majodi Ploegmakers 100757,662 ComBIT@TheOffice.net ]
[And from glowing tongues of candles I heard her whisper in my ear ]
[ ...failed solicited tcp packets
I am admittedly somewhat of a newbie but all my ports are stealthed (except
113 which is closed), my router doesn't respond to pings, etc. but I failed
the solicited tcp packets portion of the test and am trying to find out how
that happened and how to fix it. My machine runs Windows XP SP2 and I have
a D-Link router that I thought was completely secure. Can someone help?
Milton Cumpton wrote:
> I am admittedly somewhat of a newbie but all my ports are stealthed (except
> 113 which is closed), my router doesn't respond to pings, etc. but I ...question about ShieldsUp and unsolicited packets
Hi folks, if this question has already been answered before, I apologize for
asking it again here and pls direct me to where the answer is. I couldn't
find any responses that help to answer my question. Many thanks in advance
for taking the time to read this post & provide an answer.
I am running Win2K WS, ZoneAlarmPro 5.0, with an SMC wireless router (with
firewall features enabled, dummy IP for DMZ, discard ping from WAN is
enabled) and and SMC wireless adaptor, with ADSL.
(1) when I do a ShieldsUp (for the common ports or all service ports) I get
a TruStealth Analysis ...TCP/IP received packets size.
Perhaps you can help me on this one....
I have build an distributed application where more clients can connect
server. My client applications can take data from database in blobs. I
want to make a progress bar to show how much data is received and how
much is not.
Where can I find information about size of packets I have received ? Are
there any PB or system functions ?
I use Windows 95 and PB 6.0.
Any help... helps!
...tcp keep-alive packets on sles
WILL SETTING THE FIRST_WATCHDOG_PACKET TO 5 ON A SLES OES SERVER CAUSE
IT TO SEND TCP KEEP-ALIVE PACKETS EVERY FIVE MINUTES (JUST AS IT DOES ON
A NETWARE SERVER)? IF SO, THEN WHY AREN'T MY SLES SERVERS SENDING OUT
TCP KEEP-ALIVE PACKETS? IF NOT, THEN HOW DO I GET MY SLES SERVERS TO
START SENDING OUT TCP KEEP-ALIVE PACKETS?
I have had the First_Watchdog_Packet set to 5 on both NetWare and
SLES. According to Marcel Cox (a poster on this forum) but not according
to the latest Novell documentation this should result in keep-alive
packets sent from my SLES servers ever...Failed Solicited TCP Packets Test
It said that my pc tried to actively respond. A few of my packets are open
395, 396 and 400-402. The only ports reading as stealthy are 0, 83, 85,
113, 179, 1024-1027, 1029-1031, 1033, 1035-1037, 1039, 1041-1055.
I'm running Zone Alarm 4.0 with all security set to high, no custom
settings. So far I've only granted access to Outlook Express, IE,
Direcway's network (my ISP), and Nortion's AV. I have to set Direcway up as
a trusted network connection but so does everyone else and several people
have told me they tested at stealth.
I would sure appreciate any sugges...what could i do with Solicited TCP Packets: RECEIVED (FAILED)
what could i do with Solicited TCP Packets: RECEIVED (FAILED)
i am using micro trend internet security 2005 12(the newest version)
and one of the good thing about this internet security pack thet i have not
seen in any other internet security pack is thet it's block or hide reverse dns
but i still have thet Solicited TCP Packets: RECEIVED (FAILED) error and
i have port 138 closed instead of stealth but i'm not sure if this thing are related
if you have any idea i would like to here about it and thanks in advance.
"aviramof" <firstname.lastname@example.org> wrote in m...Solicited TCP Packets: RECEIVED (FAILED)
I did ShieldsUp and the summary is:
0 Ports Open
19 Ports Closed
6 Ports Stealth
25 Ports Tested
TruStealth:FAILED - NOT all tested ports were STEALTH,
- NO unsolicited packets were received,
- NO Ping reply (ICMP Echo) was received.I think this is
the problem:But wtf are Solicited TCP Pakets?What can I do to solve this
Error Solicited TCP Packets: RECEIVED (FAILED) ?I have the Outpost-Personal
"Matthias Bacher" <-email@example.com> w...Solicited TCP Packets failed, any worries here.
I am using Skype on port 41235 and I am port forwarding TCP/UDP ports to my
system on my router to avoide Relays in Skype. Sheilds up gives me the
following notice after a scan on that port;
Solicited TCP Packets: RECEIVED (FAILED)
Unsolicited Packets: PASSED
Ping Echo: PASSED
Can anyone clarify if there is a serious security risk here, I wish Steve
would touch on Open Ports on Security Now. I know Steve recommends
forwarding UPD ports for Skype but how about TCP? I can't seem to get rid
of the relays without forwarding both.
Thanks for the feedback.
On Mo...TCP/UDP Packet sniffing with WinXP
Is it possible to sniff packets sent from one ip to another ip if i know
what the 2 ip addresses are?
I dont wish to sniff my ip just a colleage of mine and his mates and see if
i can sniff out the icq traffice between the pair of them. If so what is the
best packet sniffer to use.
Re: packet sniffing in XP
Ethereal packet sniffer:
In article <firstname.lastname@example.org>, Silent@ntlworld.com says...
> Is it possible to sniff packets sent from one ip to another ip if i know
> what the 2 ip addresses are?
...Cannot retrieve TCP packets (bytes) correctly
Hi there everyone,
I have a problem with sending and receiving TCP bytes. Clients make a request to the server and the server bundles the request as well as the query results (this is a stream converted into bytes) of the request into a buffer for sending to the client. On the client side, the client receives the response and then splits the received buffer into 2: one buffer of fixed length for the protocol request (this is just a packed record) and the other buffer will contain the stream with the request results.
However, the size of the data received on the client side rarely matches...Tool to generate arbitrary UDP and TCP packets?
[cross posted and follow-ups set to grc.techtalk]
I need a tool to generate arbitrary UDP/TCP packets to test an Ethernet
device under development. Initially I need to be able to define a packet
(perhaps in hex) and transmit it to the device, then observe the
device's reply using Ethereal. Later it may be desirable to be able to
generate streams but that is not required at present, and perhaps not at
all. At some point I'll write a Windows application that understands the
protocols, at which point I won't need the "tool" anymore. I mainly need
the tool so...WinXP SP2 Firewall Dropping TCP Packets
I noticed in the WinXP firewall log that it is dtopping TCP packets from
the POA. The firewall does have exceptions set for GroupWise and for Notify.
Any reason why it would still be dropping these?
Here's a few entries from the log:
2005-05-16 09:14:50 DROP TCP X.X.X.206 X.X.X.32 1677 1366 40 FAP
472979544 4262189800 4532 - - - RECEIVE
2005-05-16 09:14:50 DROP TCP X.X.X.206 X.X.X.32 1677 1366 40 A 472979545
4262189801 4531 - - - RECEIVE
2005-05-16 09:14:51 DROP TCP X.X.X.206 X.X.X.32 1677 1365 40 FAP
2211196685 190596209 8912 - - - RECEIVE
2005-05-16 09:14:51 DROP TCP ...