D-Link DIR-655 :: Blocked TCP Packet With Unexpected Sequence?
Jul 29, 2012
On my network I have a Netgear ReadNAS connected and I'm using an add-in (ReadyNAS Remote) that simplifies the log in to for both internet and LAN-users. However, I get a lot of the following entries in the log when that add-in is being used.
When an internet user log in via ReadyNAS Remote: "Blocked outgoing TCP packet from 192.168.0.xxx:3649 to xx.xxx.xxx.xxx:50125 with unexpected acknowledgement 3320366884 (expected 754541166 to 755655246)"
When a LAN-user log in via ReadyNAS Remote: "Blocked incoming TCP packet from 69.xxx.xxx.xx:80 to xx.xx.xx.xxx:50329 with unexpected sequence 3004123085 (expected 3004136875 to 3004393915)"
how to prevent them from occuring?
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Feb 1, 2011
I've been fighting with getting VPN connections working properly with my Dlink router. I set up virtual servers for PPTP and L2TP and could usually get the first attempt to work. Subsequent client connections would always fail.The logs display the following-Dropped GRE packet from 192.168.0.10 to 64.232.xxx.xxx as unable handle packet header. Blocked incoming GRE packet from 64.232.xxx.xxx to 76.105.xxx.xxx.What seemed to fix it was going to Firewall Settings and setting UDP Endpoint Filtering to Endpoint Independent and TCP Endpoint Filtering to Address Restricted.
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Nov 27, 2011
Using a Samsung Galaxy S2, iPod Touch 3rd Gen, and Nook Color, they are all experiencing retry problems, even when 3 feet from the DIR-601. When I use them my log gets filled with messages like:Blocked incoming TCP Ack packet from 192.168.100.201:2926 to 209.85.145.113:80 with unexpected sequence On the devices I see the downloads/content taking a long time to appear and often I get a blank page or "Retry" messages. I purchased two DIR-601s and get the same problem with both. They are both running 1.02NA firmware. The WLAN is Time Warner cable modem. Prior to this I had a Linksys WRT-54 that gave great performance, though just at B/G speeds. I was hoping for a performance boost but right now the N speeds are slower than B with the retries.
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May 20, 2011
We have a web server running Joomla.There is a plugin to the website which downloads an iCal file from the internet via a URL. The site gives an error when retrieving this file. I can pull the file down manually via a browser, or doing a wget from the command line. However, the plugin fails. [code]I'm sure there's a packet being dropped in here somewhere, but from which side? Why on earth this would work fine through a browser or wget, but not via the PHP code which executes this GET?
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May 17, 2011
For about 3 minutes the 2.4GHz and 5GHz LEDs began to flash in sequence, [2.4-5-2.4-5-2.4-5-Both-Both], it just kept doing that. During that time wireless connections were unresponsive. When they went back to normal I checked the router and it didn't reboot or anything. This is the first anomaly I've ran into running the 2.05NA FW.
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Sep 14, 2011
When accessing the camera on mydlink, or on a browser using http://x.x.x.x/mjpg.cgi, I would expect the net bit rate to be substantially less than for a sequence of jpg's, since true motion-jpg uses a lossy form of intraframe compression typically yielding a 20:1 data reduction (according to wikipedia). Indeed, I can readily see this reduction in mjpg clips made on my Canon S5is camera. It's not clear whether that is happening with the d-link DCS-930L camera (640x480, quality "high", java).
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Jun 18, 2012
I bought my Dell XPS 1640 in 2009, as wireless connection card I have an intel Wifi link 5100 AGN. This card worked properly till last week all of a sudden i got unexpected DC's and all this requierd me to restart the PC 4-5 times to get 5 minutes of internet.
I know this is a known issue and it occures on random times according to the forum mentioned below url...
My question is is there a new line of cards for my laptop which DON'T have any reports about this?
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Jun 1, 2012
got this problem within the last few days
UPnP renew entry 255.255.255.255 <-> 68.98.71.182:61041 <-> 192.168.0.197:61041 UDP timeout:-1 'Teredo' (this one repeated 13 times just in that 1 info slot)
Blocked outgoing ICMP packet (ICMP type 3) from 192.168.0.197 to 109.185.100.195
Blocked incoming TCP packet from 108.170.42.83:80 to 68.98.71.182:36792 as SYN:ACK received but there is no active connection
this goes on for a multiple of different ip's and i believe its due to the fact that the game i play is p2p
QoS is off spi is off udp and tcp endpoint independent firmware version 1.21 i am using wireless cable isp using motorola sb5101 i believe i port forwarded the ports used for the game but that didnt work so i put my computer into dmz. I've also noticed a lot more jitter then i used to have and my upload speed is down about 4mbps. Was thinking it might just be outdated firmware?
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Jan 30, 2013
Yesterday I had the snapshots setup to be sent to my gmail account and now they've been blocked as spam. Is there anyway to get around this? The motion detection area is set to 90% so I see why I'm getting a bunch of snapshots. Is there a setting I can change on my gmail account or is the only option to reduce the percentage? I'd prefer to get all of the emails.
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Nov 30, 2011
Is it possible to get both allowed and blocked web access logging? I'm using the 2.06NA firmware and no matter how I configure the router, I just can't get it to work, so either I'm missing something or the firmware has a defect, I hope its me, but I fear its a defect.
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May 16, 2013
I noticed that no matter what URL I put for a website using HTTPS such as Facebook [url]...
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Aug 30, 2011
I'm new to networking (at least at this level) and need some guidance. First, I have an Actiontec MI424WR (Rev. F) Coax Verizon Fios modem that I use as my home networking wireless router. From a LAN port on that I've connected a cable to the WAN port on my DIR-655 which acts as my gigabit office hard wire/wireless router. I need to keep the home network and the office network separate.All of my computers are Windows, either 7, Vista or XP.Connected to my Dir-655 on the office network are 2 wireless computers, a printer, an IOMEGA 1TB Home Personal Cloud NAS HDD, plus 2 desktop computers.The DIR-655 is set with a static IP address matching the range of the Actiontec. The DIR-655 is set for DHCP for the devices on the network (although 2 of the computers have static IP address).
When the DIR-655 had a Dynamic IP address set by the Actiontec, the IOMEGA NAS HDD kept losing connection with all the devices on the network. Only after I set the DIR-655 to static IP did that stop and everybody started to play nice. I'm not sure why that would make a difference, but it did.But regardless of whether it is set to dynamic or static, no computer on the network or program, even third party programs, can connect to ANY of the time servers out there... and I mean any of them. I've tried at least 20 or more of the standard and not so standard ones. The DIR-655's time is off, and it is set to get time automatically. None of my computers, or my IOMEGA NAS, can access time. The Actiontec, though, seems to be set correctly.Everything connects to the internet just fine. Web, email, auto product upgrades. Fine. So far it's just the time server thing which troubles.I done everything I know how to do to enable Port Forwarding through both routers for NTP > UDP 123 since that is the standard port for the Network Time Protocol, but I could have easily screwed that up.
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Dec 6, 2012
Region : UnitedKingdom
Model : TD-W8951ND
Hardware Version : V1
Firmware Version : Latest
ISP :
In trying to make sure it was NOT wide open to the internet (amongst many other problems of setting it up, which I ,may address later if I can actually connect to the thing ever again) I told it to only accept connections from a range of address inside the LAN. Now it wont accept anything except telnet from the LAN.Short of wiping out 6 hours of trial and error configuration and resetting it, are there any other options I can exercise via the telnet interface?
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Apr 14, 2013
Region : UnitedStates
Model : TL-WDR4300
Hardware Version : V1
Firmware Version : Latest
ISP :
The UDP connections are being blocked when I use my VPN. I can connect for a while but soon after a while, the connection doesn't work. I can't even access the router page.
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May 4, 2011
I'm trying to set up a website filter on my DIR-601. I created a policy for 2 MAC addresses, with a schedule from 10AM-6PM, selected "Block some websites", and disabled logging. Under website filter, I added some entries, and selected "DENY computers access to ONLY these sites". When the policy is enabled, and I try to access one of the blocked websites, it gets blocked correctly ("The URL access was denied by administrator.") However, for all other websites, I get "server unexpectedly dropped the connection" errors, eg "Safari can�t open the page [URL] because the server unexpectedly dropped the connection. This sometimes occurs when the server is busy. Wait for a few minutes, and then try again." or in Chrome "No data received. Unable to load the webpage because the server sent no data." This happens with ALL non-blocked websites. I'm using hardware version A1, firmware version 1.01NA.
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May 22, 2012
I having a basic query in troubleshooting E1 link , here im facing packet drop in the link and we are testing by providing local loop and remote loop from the CSU/DSU at local point and at remote point . I have tried ping test while the loop is given at local point and remote point ie i have pinged my local serial interface IP address (eg 10.0.0.1 -local & 10.0.0.2 -remote ) in Remote Loop i could see no errors and drops and also the traffic on the interface output and input is the same(eg input rate 1000bps and output rate 1000bps) .My query is that when i am pinging the local interface IP does the icmp packet travels till the loop point and comes to the same interface(like a boomerang) .
ICMP packet
->->->->->->->->->->->->->->->
R1 Local CSU/DSU | Remote CSU/DSU (remote loop given )
O-----------O------------------------------O |--------------------------------------O R2
<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-|
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May 7, 2013
I have two routers, Cisco 3825 and 2811 connected via a p2p ethernet link. The two sides of the links have Huawei muxes with 100/ full duplex set on their interface. I am facing almost 40% packet loss but the supplier is unable to identify any issues at their end. We have tried setting different combinations of duplex and speed settings but no improvement. When set to auto/auto the interfaces are negotiating to half duplex and I am sure this is the cause of the packet loss. Also I heard of auto-negotiation on MUX ports but supplier confirmed no such settings but only 100 Full duplex. If the router iterface is negotiating to half duplex so I suppose there is some thing with the negotition problem with MUX and router port ?
On C3825 I have a Gig interface whileas C2811 has fastEthernet. I guess Gig interface should not negotiate ? Is there a way to pin point the exact fault to supplier ? Also is there work around for this?
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Feb 3, 2013
I've no experience in VoIP and been ditched with looking at an IP trunking problem on our network.The users where getting dead lines or silent calls, but it seems after re-seating IP trunking card here and there around the network a few times, all is settled to normal. Unfortunately it's a third party that look after the majority of the telephony, and as they can't figure out why this happens they often say it must be a problem with the data WAN it traverses.So I started trying to figure something out, I have IPSLA monitoring setup in Solarwinds on most of the routers and all looks well from that aspect; MOS is 4.34 and Jitter is only 1ms at worst. I've taken a wireshark packet capture of the IP trunk by mirroring the port on the switch at a main site where I've been told a lot of calls are routed through. Inside wireshark I used the 'telephony> voip calls' tool and decoded all the calls. The output is showing most calls have 'Out of Seq' and 'Wrong Timestamp' at around 25-50%. Although these calls seem fine otherwise, and I took this capture whilst the fault was not occurring. I know I need to capture next time when the fault is occurring, but this is what I have for now.How can i fix this or even start to troubleshoot further?
p.s- each site has two routers running GLBP to the WAN, over two ISP locations. I read something about having consistent routing to avoid packets arriving out of sequence, but haven't found anything yet to say this is how I can/should do that.
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Oct 12, 2011
Has anyone come across a ping cmd utility for windows with more functionality like the linux one? What I want really is sequence numbering and RTT measured with a few decimals.
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Apr 25, 2011
I have a concern about my system. I am running Win XP Pro on my computer and when it boots up and I log in, it takes about two minutes with the internet first, AVG following and windows firewall last amongst other apps.Is there a way that I can increase my loading speeds plus changing the bootup sequence so I don't run high risk of infections from trojans or malware?
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Jan 3, 2013
On one of my computer i'm having multiple issues. when I am on most websites it pops up " TypeError: object unexpected" or just "object unexpected" and I have to refresh the page for them to go away, but if I hit the back button or go to another section of the web page they pop back up. The same computer is now having connection issues and only has "unidentified network no internet access" as the only option, and after everything I have tried it will not budge on the wifi.
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Apr 14, 2011
I just installed a new ACS 5.1 to authenticate wireless PEAP users, so I created an Access policy "WirelessUsers" with identity store being Windows Active directory and all domain users are selected, and create a service rule that dictates that if the authentication protocol is radius, network device belongs to WLC device group, the result service will be "WirelessUsers", so this part worked perfectely, all domain users are able to gain wireless access via their DOMAIN/usernames and domain passwords. Now I want ACS local indentity store users (those local usernames can be the same or different from their AD usernames) to be able to manage those controllers, so I created another access policy "DeviceAdminUsers" with identity store being local users, another service rule which says that if the authentication protocol is radius, network device belongs to WLC device group, the result service will be "DeviceAdminUsers". The problem is that with the setup, whenenve when I try to SSH to WLC, ACS always put me in "WirelessUsers" access policy, even the login name does not have DOMAIN pre-pended or the login name simly does not exist in AD. if I put the second rule in front of first rule, I am able to authenticate with ACS local username/password and gain access to WLC, but wireless users will fail to authenticate, because ACS is trying to put regular wiress users in "DeviceAdminUsers" access policy. I would expect if username does not exist in AD, ACS should proceed with next rule. Similar requirement was easily achieved in ACS 3.3.
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Apr 4, 2012
erro came with 3722------however after checking date and time i was able to login. AZAD
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Oct 22, 2012
I was wondering what could cause this, because every time this message shows up in the log I lose internet connection for about 1 minute then it comes back up. Let me know if I need to get any config info.
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Jan 31, 2012
I have an issue with an ASR 1001. The problem occurs with MQC shaping applied to a gigabit interface in the outbound direction. The CIR of the provider we are using is 100Mb/sec, so we are shaping to that value. However when reported traffic levels are about 60Mb/sec, we see a steady increase in output drops. [code]
I have also tried increasing the hold queue, however this does not work with the drops. Increasing the shaping rate to 200Mb/sec gets rid of almost all the drops (not quite all!) but is not what we need. I think that we should see some drops when rates spike above 100mb, however the amount we are seeing seems excessive?
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Mar 2, 2012
I've heard mixed things about the use of DHCP release messages. I've heard that some operating systems don't bother with them at all, which makes sense because many users disconnect the network media without shutting down the workstation. Which operating systems actually send out release messages as part of their shutdown sequence?
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Jan 17, 2012
I have a Dell Latitude E6410 laptop that does not have a Serial port or a Break key on the keyboard. I have a Prolific PL2303 USB-to-Serial adapter which is installed and I can access the CLI ok with this setup via HyperTerminal.
My problem is that I am unable to break into ROMMON using the break sequence Ctrl + Break (as there is no break key). I have also tried TeraTerm with the break sequence of Alt + B.
Additionally, I have tried setting the baud rate to 2600 and pressing the space bar for 10 seconds to no avail.
when I may need to break into ROMMON.
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Oct 28, 2012
I have a 2514 Router that i have tried numerous times to access the break sequence and do a pwd reset, while connected to the console port.. How ever its whopping me good..
[code]....
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Aug 9, 2012
In last days I'm having problems with a Cisco 1812 device. It works for some time but then crashes and gives the same info.
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Apr 16, 2012
I have a number of WLCs/WiSM2 running 7.0.230.0 (still using WCS for management). The management interfaces for the controllers are on a purely private subnet. While going through the intenet edge ASA logs I noticed some traffic drops for the controllers on the Inside interface. I took a packet capture from the controllers and found that they were sending TCP traffic to a number of IP addresses (Microsoft, Hotmail and Google) - always with a src port 2028 (submitserver) with the ACK/FIN flags set. Why this traffic is coming from the management interfaces? The management interface is not used by any wireless clients and is not the default interface for any of the SSIDs.
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May 22, 2013
I have a number of WLCs/WiSM2 running 7.0.230.0 (still using WCS for management). The management interfaces for the controllers are on a purely private subnet. While going through the intenet edge ASA logs I noticed some traffic drops for the controllers on the Inside interface. I took a packet capture from the controllers and found that they were sending TCP traffic to a number of IP addresses (Microsoft, Hotmail and Google) - always with a src port 2028 (submitserver) with the ACK/FIN flags set.
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Dec 14, 2011
We have a lab network set up with a 7609 router as the central core. Scenario: Laptop with a SIP client. In the lab is a session border controller that will route signaling and media to a SIP gateway with a call agent (172.23.112.201) and a media "handler" (172.23.113.6). The call processing device will forward packets to an RF network (108.x.x.x) where an NCS cable modem sits.Call signaling works perfectly fine. However, RTP traffic from the laptop to the NCS phone is getting routed incorrectly. RTP traffic from the phone to the laptop works fine. [code]
Packet captures show the laptop to phone RTP packets are being routed back towards the corporate router. These time out with ICMP TTL exceeded packets. There are static routes for 172.23.113.0/27 to the optical interfaces that go to the SIP gateway. Interestingly, I can ping an IP on the SIP gateway (not used for media, but is pingable) in that static range (172.23.113.1) just fine from the 7609 (i.e. it's not getting routed to the corporate router). Unfortunately, the IP for the media endpoint on the SIP gateway is not pingable. Config for the 7609 is attached.
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Apr 7, 2011
I use a CISCO ASA 5505 with ASA 8.3. Everything works fine, but when I type the following line I get an error message:
nat (inside,outside) source dynamic OBJ_SPECIFIC_192-168-1-0 10.1.5.5ERROR: 10.1.5.5 doesn't match an existing object or object-groupI even tried to create the missing object but it did not work. The document also explains how to use ASDM for this configuration. It seems that there an object 10.1.5.5. is created.
This is the output of "show running-config":
ASA Version 8.3(1) !hostname ciscoasaenable password 8Ry2YjIyt7RRXU24 encryptedpasswd 2KFQnbNIdI.2KYOU encryptednames!interface Vlan1 nameif inside security-level 100 ip address 192.168.1.1 255.255.255.0 !interface Vlan2 nameif outside security-level 0 ip address 10.1.5.1 255.255.255.0 !interface Ethernet0/0 switchport access vlan 2!interface Ethernet0/1!interface Ethernet0/2! interface Ethernet0/3!interface Ethernet0/4!interface Ethernet0/5!interface Ethernet0/6!interface Ethernet0/7!ftp mode passiveobject network obj_any subnet 0.0.0.0 0.0.0.0object network
[code]....
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