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• Win 7 Netbook refuses to ping JetDirect card (all other PCs work)

  - by Luke Puplett

  I have an odd thing occuring here. From a Windows 7 netbook, I cannot ping an HP printer on the network, while all other machines (Win7/Vista) can. And the netbook can also ping everything else on the LAN. Example showing that the netbook can ping 192.168.3.4 but not 3.6. C:\Users\backdoor>ping w7ue1m Pinging w7ue1m.corp.biz.co.uk [192.168.3.4] with 32 bytes of data: Reply from 192.168.3.4: bytes=32 time=7ms TTL=128 Reply from 192.168.3.4: bytes=32 time=4ms TTL=128 Reply from 192.168.3.4: bytes=32 time=2ms TTL=128 Reply from 192.168.3.4: bytes=32 time=2ms TTL=128 Ping statistics for 192.168.3.4: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 2ms, Maximum = 7ms, Average = 3ms C:\Users\backdoor>ping uktnprint1 Pinging uktnprint1.corp.biz.co.uk [192.168.3.6] with 32 bytes of data: Reply from 192.168.3.0: Destination host unreachable. Reply from 192.168.3.0: Destination host unreachable. Reply from 192.168.3.0: Destination host unreachable. Reply from 192.168.3.0: Destination host unreachable. Ping statistics for 192.168.3.6: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),`enter code here` The IPCONFIG result for the netbook is fine. IPv4 Address. . . . . . . . . . . : 192.168.3.0 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : 192.168.1.1 Most unusual network thing I've seen in years. I must reiterate that only this netbook is having trouble pinging/printing. Thanks, Luke ** UPDATE ** Am now on a Vista box, and here's the IPCONFIG: IPv4 Address. . . . . . . . . . . : 192.168.3.3 Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : 192.168.1.1 Pinging uktnprint1.corp.biz.co.uk [192.168.3.6] with 32 bytes of data: Reply from 192.168.3.6: bytes=32 time=2ms TTL=60 Firewall is off. I'll look into the chance of an IP conflict because it's the only thing I can think of - compare arp caches of each machine. Cheers!

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• Win 2k3 - DNS query ?

  - by nXqd

  I'm learning about network and I configured DNS in 2k3. In forward zone : cntt.edu www.cntt.edu [ 192.168.188.4 ] . [ All IP / DNS configuration is right ] After that I use wireshark to catch packet when I enter www.cntt.edu in IE . I see there's no DNS here, I forward directly to 192.168.188.4, there's no query . Any problem ? Thanks for reading this :)

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• Do all routers really must know all routes to every router?

  - by Philipili

  This is my complicated and long question. First let's talk about the context. Network topology: PC A --- RT A --- RT C --- RT B --- PC B (RT C has a WAN NIC connected to "the cloud") With this situation : PC A must send a packet to PC B Default routes direct packets to the cloud We haven't access to RT C's configuration RT C only knows how to join network A, not network B RT A knows about network B RT B knows about network A RT C's routing table: Destination NIC Gateway 0.0.0.0 WAN Cloud Network A LAN A RT A's WAN RT A's routing table: Destination NIC Gateway 0.0.0.0 WAN LAN A Network B WAN LAN A RT B's routing table: Destination NIC Gateway 0.0.0.0 WAN LAN B Network A WAN LAN B I would like to permit PC A and PC B to communicate, but I don't have access to RT C. Networks B and BC are new. Can PC A send a packet to RT B's WAN NIC (which is possible) and "ask RT B to direct the packet to PC B" ? I believe replacing RT B with a VPN server should do the trick, but I would like to know if it is possible to make it without establishing a new connection.

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• iPod Touch G4 disconnects from Belkin N+ Router at random intervals

  - by leeand00

  I have an iPod Touch G4 and a Belkin N+ Router F5D8235-4 v2, and for some reason the iPod Touch disconnects from the router at random intervals. Checking the settings in the iPod, it will read that it is still connected to the router, but before I can access the internet again, I have to turn on Airplane mode and then turn it off again to get any program to work with the Internet again. I've tried upgrading the firmware in the router, but that also doesn't seem to help. I'm using the wiresless mode 802.11b&802.11g&802.11n in the 20/40MHz frequency. Is there any way of fixing this issue? It doesn't happen with any of the other devices that are connected to the router. This post has been cross-posted here

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• How to connect to a PEAP GTC wifi network with Android 2.2 on a nexus one?

  - by Glen

  Hi, I recently updated my nexus one to 2.2. Now I can't connect to my uni's wifi. They use PEAP with GTC. I had it working fine on 2.1. Also it works fine on my Ubuntu laptop. I have entered my uni number (user name) in the identity box. I have entered my password in the password box. I have emailed the certificated that works on Ubuntu to my self and installed it on the nexus one. I have enabled secure credentials. What am I doing wrong? Thanks, Glen.

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• Host spreads wrong MAC Adress of router on the WIFI

  - by JavaIsMyIsland

  Strange things are going on our network. Since yesterday a host which is actually not on our subnet spreads wrong ARP Replys on our network. To be precise, only on the WIFI. If I connect my Laptop to the cable ethernet, it gets the right MAC adress of the router. Also my Android phone and my Ubuntu system do get the right MAC Adress. So I took a look at wireshark. When I clear the ARP cache of the windows machine, the first ARP response is correct and comes from the router. But like 10 ms later another ARP response comes from another host in the WIFI. The host changes its IP Adresses from time to time and they look like they are not on our subnet. So I can not use the internet because DNS is not working anymore. Sometimes the router wins the race condition and the mac adress is set correctly in the arp cache. I first thought, this is an arp-poisoning mitm attack but it does not make sense if the packets get not routed correctly?! I restarted the router but it didn't help. I have no access to the router, else I would change the shared key to make sure there is no intruder on the wifi.

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• help with internet

  - by Remus Rigo

  hi all I have 3 PC's at home (with Win XP, Win 7 & Win 7) and a router. I am always connected to the internet through the router (PPoE connection). My problem is that sometimes when I want to search or open a page, my browser tells me that the server cannot be reached, as if I don't have a connection to the internet. Other times it logs me out from messenger, but browsing still works. FTP download/upload also works. If i disable and enable the LAN then all works fine. Anyone got any idea besides re-installing OS? thanks

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• solaris + dladm + what is unknown state and how to bring it to up?

  - by yael

  I installed Solaris 10 on my netra machine from dladm show-dev I can see which interface are down or up all interfaces are connected to the Cisco switch , and all leds are light's on all LAN cards but I not understand why all interfaces except e1000g0 are in unknown ? Please advice how to bring the unknown interfaces to up ? # dladm show-dev e1000g0 link: up speed: 1000 Mbps duplex: full e1000g1 link: unknown speed: 0 Mbps duplex: unknown e1000g2 link: unknown speed: 0 Mbps duplex: unknown e1000g3 link: unknown speed: 0 Mbps duplex: unknown nxge0 link: unknown speed: 0 Mbps duplex: unknown nxge1 link: unknown speed: 0 Mbps duplex: unknown nxge2 link: unknown speed: 0 Mbps duplex: unknown nxge3 link: unknown speed: 0 Mbps duplex: unknown

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• Updated Win XP to 7: network adapter driver problem

  - by jiri

  I updated Windows XP on my old laptop to Windows 7. After installing I tried to open internet connection but Win 7 says that it cannot find network adapter because of a missing driver. I tried to find network adapter from device manager but could not find one. My network connection was working fine on Win XP. What has happened, how to update my network adapter driver for Windows 7?

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• External hard drive no detected in a vista ultimate

  - by raghavendra

  Hi, I have created a partition in my external HD and later i am trying to install XP over Vista . So i have entered into my DOS prompt and i choose the DISK TYPE and i choose external DD and i tried to CLEAN it , Immediately my external HD is asked for FORMAT and i rejected it . After that i restarted my system , therefore i cannot able to see my external HD on my sysmen External HD: Seagate Free agent(500GB)

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• Share a USB sound card over a network/bluetooth (Mac & PC)

  - by AlexW

  I've been wondering how I can stream audio to an external Edirol USB sound card, wirelessly, on both Mac and PC. I'm not looking for high quality transmission, just to play mp3s from my Mac laptop to a USB sound card that is attached to two very nice balanced studio reference monitors. Is there any way I can firstly power the sound card box, and secondly, provide with an audio stream along it's USB input. I've looked at the Belkin USB hub, and I have a Time Capsule with the AirPort interface inside. These things seem to do vaguely what I want but when it comes to audio, the specifications are less clear. Any suggestions very welcome.

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• In Ubuntu, MoBlock makes it take a while to actually start using internet

  - by Matchu

  When connecting to wireless internet in Ubuntu (tested with two different networks), I connect nearly instantly. However, to actually load a page, I need to wait a few minutes, at which point I can actually use a web browser or Pidgin. Until then, various applications try to connect until they time out. I've discovered that, if instead of waiting a few minutes, I open Terminal and run sudo /etc/init.d/blockcontrol stop, everything suddenly is able to load. I can then start MoBlock again with no ill effects. Why is this happening? What is it that would cause MoBlock to take a few minutes to start letting traffic in, but only when started on bootup? Thanks!

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• utorrent does not work with proxy server

  - by developer

  I have utorrent 3.2.2(build 28500) 32-bit. I am trying to download torrent using a proxy server but nothing is working. It shows that you have a wrong network configuration. But the same server settings is working for Google chrome and Internet Download Manager. How to do it ? Also one questions: Any way to convert torrent to direct download other than zbigz.com, torrific.com and torcache.com ( i tried them, not working)?

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• SMB super slow within LAN between MAC and PC

  - by asdcasdc

  I have a windows desktop which stores all my movies, songs and pictures. I have a mac laptop which I would like to access these files. I don't want to utilize the FTP or SCP protocol because I don't want them to be downloaded to my mac. I want to access them as if they are a network mounted disk. So I tried using the native SMB protocol (available in Finder - Go - Connect to server). I tried dragging a file and dropping it onto my MAC's desktop. Surprisingly, I am only able to transfer at a very slow rate of about 1mb/s. Assuming network connectivity is not a problem, has anyone experienced incredible slowness with SMB? Are there alternative protocols for me to use in this case between PC and MAC?

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• FreeBSD 8.1 unstable network connection

  - by frankcheong

  I have three FreeBSD 8.1 running on three different hardware and therefore consist of different network adapter as well (bce, bge and igb). I found that the network connection is kind of unstable which I have tried to scp some 10MB file and found that I cannot always get the files completed successfully. I have further checked with my network admin and he claim that the problem is being caused by the network driver which cannot support the load whereby he tried to ping using huge packet size (around 15k) and my server will drop packet consistently at a regular interval. I found that this statement may not be valid since the three server is using three different network drive and it would be quite impossible that the same problem is being caused by three different network adapter and thus different network driver. Since then I have tried to tune up the performance by playing around with the /etc/sysctl.conf figures with no luck. kern.ipc.somaxconn=1024 kern.ipc.shmall=3276800 kern.ipc.shmmax=1638400000 # Security net.inet.ip.redirect=0 net.inet.ip.sourceroute=0 net.inet.ip.accept_sourceroute=0 net.inet.icmp.maskrepl=0 net.inet.icmp.log_redirect=0 net.inet.icmp.drop_redirect=1 net.inet.tcp.drop_synfin=1 # Security net.inet.udp.blackhole=1 net.inet.tcp.blackhole=2 # Required by pf net.inet.ip.forwarding=1 #Network Performance Tuning kern.ipc.maxsockbuf=16777216 net.inet.tcp.rfc1323=1 net.inet.tcp.sendbuf_max=16777216 net.inet.tcp.recvbuf_max=16777216 # Setting specifically for 1 or even 10Gbps network net.local.stream.sendspace=262144 net.local.stream.recvspace=262144 net.inet.tcp.local_slowstart_flightsize=10 net.inet.tcp.nolocaltimewait=1 net.inet.tcp.mssdflt=1460 net.inet.tcp.sendbuf_auto=1 net.inet.tcp.sendbuf_inc=16384 net.inet.tcp.recvbuf_auto=1 net.inet.tcp.recvbuf_inc=524288 net.inet.tcp.sendspace=262144 net.inet.tcp.recvspace=262144 net.inet.udp.recvspace=262144 kern.ipc.maxsockbuf=16777216 kern.ipc.nmbclusters=32768 net.inet.tcp.delayed_ack=1 net.inet.tcp.delacktime=100 net.inet.tcp.slowstart_flightsize=179 net.inet.tcp.inflight.enable=1 net.inet.tcp.inflight.min=6144 # Reduce the cache size of slow start connection net.inet.tcp.hostcache.expire=1 Our network admin also claim that they see quite a lot of network up and down from their cisco switch log while I cannot find any up down message inside the dmesg. Have further checked the netstat -s but dont have concrete idea. tcp: 133695291 packets sent 39408539 data packets (3358837321 bytes) 61868 data packets (89472844 bytes) retransmitted 24 data packets unnecessarily retransmitted 0 resends initiated by MTU discovery 50756141 ack-only packets (2148 delayed) 0 URG only packets 0 window probe packets 4372385 window update packets 39781869 control packets 134898031 packets received 72339403 acks (for 3357601899 bytes) 190712 duplicate acks 0 acks for unsent data 59339201 packets (3647021974 bytes) received in-sequence 114 completely duplicate packets (135202 bytes) 27 old duplicate packets 0 packets with some dup. data (0 bytes duped) 42090 out-of-order packets (60817889 bytes) 0 packets (0 bytes) of data after window 0 window probes 3953896 window update packets 64181 packets received after close 0 discarded for bad checksums 0 discarded for bad header offset fields 0 discarded because packet too short 45192 discarded due to memory problems 19945391 connection requests 1323420 connection accepts 0 bad connection attempts 0 listen queue overflows 0 ignored RSTs in the windows 21133581 connections established (including accepts) 21268724 connections closed (including 32737 drops) 207874 connections updated cached RTT on close 207874 connections updated cached RTT variance on close 132439 connections updated cached ssthresh on close 42392 embryonic connections dropped 72339338 segments updated rtt (of 69477829 attempts) 390871 retransmit timeouts 0 connections dropped by rexmit timeout 0 persist timeouts 0 connections dropped by persist timeout 0 Connections (fin_wait_2) dropped because of timeout 13990 keepalive timeouts 2 keepalive probes sent 13988 connections dropped by keepalive 173044 correct ACK header predictions 36947371 correct data packet header predictions 1323420 syncache entries added 0 retransmitted 0 dupsyn 0 dropped 1323420 completed 0 bucket overflow 0 cache overflow 0 reset 0 stale 0 aborted 0 badack 0 unreach 0 zone failures 1323420 cookies sent 0 cookies received 1864 SACK recovery episodes 18005 segment rexmits in SACK recovery episodes 26066896 byte rexmits in SACK recovery episodes 147327 SACK options (SACK blocks) received 87473 SACK options (SACK blocks) sent 0 SACK scoreboard overflow 0 packets with ECN CE bit set 0 packets with ECN ECT(0) bit set 0 packets with ECN ECT(1) bit set 0 successful ECN handshakes 0 times ECN reduced the congestion window udp: 5141258 datagrams received 0 with incomplete header 0 with bad data length field 0 with bad checksum 1 with no checksum 0 dropped due to no socket 129616 broadcast/multicast datagrams undelivered 0 dropped due to full socket buffers 0 not for hashed pcb 5011642 delivered 5016050 datagrams output 0 times multicast source filter matched sctp: 0 input packets 0 datagrams 0 packets that had data 0 input SACK chunks 0 input DATA chunks 0 duplicate DATA chunks 0 input HB chunks 0 HB-ACK chunks 0 input ECNE chunks 0 input AUTH chunks 0 chunks missing AUTH 0 invalid HMAC ids received 0 invalid secret ids received 0 auth failed 0 fast path receives all one chunk 0 fast path multi-part data 0 output packets 0 output SACKs 0 output DATA chunks 0 retransmitted DATA chunks 0 fast retransmitted DATA chunks 0 FR's that happened more than once to same chunk 0 intput HB chunks 0 output ECNE chunks 0 output AUTH chunks 0 ip_output error counter Packet drop statistics: 0 from middle box 0 from end host 0 with data 0 non-data, non-endhost 0 non-endhost, bandwidth rep only 0 not enough for chunk header 0 not enough data to confirm 0 where process_chunk_drop said break 0 failed to find TSN 0 attempt reverse TSN lookup 0 e-host confirms zero-rwnd 0 midbox confirms no space 0 data did not match TSN 0 TSN's marked for Fast Retran Timeouts: 0 iterator timers fired 0 T3 data time outs 0 window probe (T3) timers fired 0 INIT timers fired 0 sack timers fired 0 shutdown timers fired 0 heartbeat timers fired 0 a cookie timeout fired 0 an endpoint changed its cookiesecret 0 PMTU timers fired 0 shutdown ack timers fired 0 shutdown guard timers fired 0 stream reset timers fired 0 early FR timers fired 0 an asconf timer fired 0 auto close timer fired 0 asoc free timers expired 0 inp free timers expired 0 packet shorter than header 0 checksum error 0 no endpoint for port 0 bad v-tag 0 bad SID 0 no memory 0 number of multiple FR in a RTT window 0 RFC813 allowed sending 0 RFC813 does not allow sending 0 times max burst prohibited sending 0 look ahead tells us no memory in interface 0 numbers of window probes sent 0 times an output error to clamp down on next user send 0 times sctp_senderrors were caused from a user 0 number of in data drops due to chunk limit reached 0 number of in data drops due to rwnd limit reached 0 times a ECN reduced the cwnd 0 used express lookup via vtag 0 collision in express lookup 0 times the sender ran dry of user data on primary 0 same for above 0 sacks the slow way 0 window update only sacks sent 0 sends with sinfo_flags !=0 0 unordered sends 0 sends with EOF flag set 0 sends with ABORT flag set 0 times protocol drain called 0 times we did a protocol drain 0 times recv was called with peek 0 cached chunks used 0 cached stream oq's used 0 unread messages abandonded by close 0 send burst avoidance, already max burst inflight to net 0 send cwnd full avoidance, already max burst inflight to net 0 number of map array over-runs via fwd-tsn's ip: 137814085 total packets received 0 bad header checksums 0 with size smaller than minimum 0 with data size < data length 0 with ip length > max ip packet size 0 with header length < data size 0 with data length < header length 0 with bad options 0 with incorrect version number 1200 fragments received 0 fragments dropped (dup or out of space) 0 fragments dropped after timeout 300 packets reassembled ok 137813009 packets for this host 530 packets for unknown/unsupported protocol 0 packets forwarded (0 packets fast forwarded) 61 packets not forwardable 0 packets received for unknown multicast group 0 redirects sent 137234598 packets sent from this host 0 packets sent with fabricated ip header 685307 output packets dropped due to no bufs, etc. 52 output packets discarded due to no route 300 output datagrams fragmented 1200 fragments created 0 datagrams that can't be fragmented 0 tunneling packets that can't find gif 0 datagrams with bad address in header icmp: 0 calls to icmp_error 0 errors not generated in response to an icmp message Output histogram: echo reply: 305 0 messages with bad code fields 0 messages less than the minimum length 0 messages with bad checksum 0 messages with bad length 0 multicast echo requests ignored 0 multicast timestamp requests ignored Input histogram: destination unreachable: 530 echo: 305 305 message responses generated 0 invalid return addresses 0 no return routes ICMP address mask responses are disabled igmp: 0 messages received 0 messages received with too few bytes 0 messages received with wrong TTL 0 messages received with bad checksum 0 V1/V2 membership queries received 0 V3 membership queries received 0 membership queries received with invalid field(s) 0 general queries received 0 group queries received 0 group-source queries received 0 group-source queries dropped 0 membership reports received 0 membership reports received with invalid field(s) 0 membership reports received for groups to which we belong 0 V3 reports received without Router Alert 0 membership reports sent arp: 376748 ARP requests sent 3207 ARP replies sent 245245 ARP requests received 80845 ARP replies received 326090 ARP packets received 267712 total packets dropped due to no ARP entry 108876 ARP entrys timed out 0 Duplicate IPs seen ip6: 2226633 total packets received 0 with size smaller than minimum 0 with data size < data length 0 with bad options 0 with incorrect version number 0 fragments received 0 fragments dropped (dup or out of space) 0 fragments dropped after timeout 0 fragments that exceeded limit 0 packets reassembled ok 2226633 packets for this host 0 packets forwarded 0 packets not forwardable 0 redirects sent 2226633 packets sent from this host 0 packets sent with fabricated ip header 0 output packets dropped due to no bufs, etc. 8 output packets discarded due to no route 0 output datagrams fragmented 0 fragments created 0 datagrams that can't be fragmented 0 packets that violated scope rules 0 multicast packets which we don't join Input histogram: UDP: 2226633 Mbuf statistics: 962679 one mbuf 1263954 one ext mbuf 0 two or more ext mbuf 0 packets whose headers are not continuous 0 tunneling packets that can't find gif 0 packets discarded because of too many headers 0 failures of source address selection Source addresses selection rule applied: icmp6: 0 calls to icmp6_error 0 errors not generated in response to an icmp6 message 0 errors not generated because of rate limitation 0 messages with bad code fields 0 messages < minimum length 0 bad checksums 0 messages with bad length Histogram of error messages to be generated: 0 no route 0 administratively prohibited 0 beyond scope 0 address unreachable 0 port unreachable 0 packet too big 0 time exceed transit 0 time exceed reassembly 0 erroneous header field 0 unrecognized next header 0 unrecognized option 0 redirect 0 unknown 0 message responses generated 0 messages with too many ND options 0 messages with bad ND options 0 bad neighbor solicitation messages 0 bad neighbor advertisement messages 0 bad router solicitation messages 0 bad router advertisement messages 0 bad redirect messages 0 path MTU changes rip6: 0 messages received 0 checksum calculations on inbound 0 messages with bad checksum 0 messages dropped due to no socket 0 multicast messages dropped due to no socket 0 messages dropped due to full socket buffers 0 delivered 0 datagrams output netstat -m 516/5124/5640 mbufs in use (current/cache/total) 512/1634/2146/32768 mbuf clusters in use (current/cache/total/max) 512/1536 mbuf+clusters out of packet secondary zone in use (current/cache) 0/1303/1303/12800 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/6400 9k jumbo clusters in use (current/cache/total/max) 0/0/0/3200 16k jumbo clusters in use (current/cache/total/max) 1153K/9761K/10914K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 0/8/6656 sfbufs in use (current/peak/max) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile 0 calls to protocol drain routines Anyone got an idea what might be the possible cause?

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• How do i set up a fully featured small business network?

  - by JoshReedSchramm

  This has the possibility to be a very large question but I recently acquired a few rack mount servers and the hardware necessary to run them. Unfortunately I'm a programmer with very little understanding of how to set up a good working network so I'm hoping someone on here might be able to help. What I want to do is run a domain with a series of subdomains which would all be externally accessible. The setup would live inside my home and my internet connection is your run of the mill cable model (which means a dynamic IP) I want to be able to set up a couple site, specifically: www.mycompany.com (mycompany.com with no subdomain would redirect to this) build.mycompany.com (for my continuous integration server) ruby.mycompany.com (for ruby projects) win.mycompany.com (for windows project) etc. Additionally this is still my home network so our personal machines need to be able to get on via wifi with at least the same security we have now through an out of the box router from best buy. I'm thinking i need a DNS server, DHCP server and one of those would run either no-ip or dyndns to accommodate the dynamic ip. I don't necessarily need mail but it might be helpful to have some sort of mail server i could use for testing, it doesn't need to get out to the greater internet though. So how do i set up this kinda of network? tl;dr Need to know how to set up your standard office style network in my home off my normal consumer level cable modem connection.

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• subnetting a class c on a cisco 3825

  - by Adeodatus

  I have a class C that I want to better understand before I implement a change. Right now, ip address 192.168.0.1 255.255.255.192 ip address 192.168.0.65 255.255.255.240 secondary So, where is the 192.168.0.64 address in that mix? 192.168.0.63 should be the broadcast for the first one, and 192.168.0.65 should be the cisco secondary ip. And ... How then do I add a /28 (255.255.255.240) right before this segment: ip address 192.168.0.249 255.255.255.248 secondary In fact, I'll probably want to add it as a subinterface Can anyone help me to better understand whats going on and then how to do it?

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• how can I reconnect DSL in cisco router 877w

  - by Sulaiman

  Hi All, I've configured ADSL and added a new public LAN ips for the router. How can I reconnect DSL connection and apply the new configuration without executing the command reload this is the commands I am using for DSL configuration config terminal interface dialer 0 ppp chap hostname User ppp chap password 0 Pass exit exit wr mem and this is the commands I am using for adding IP addresses: configure t interface vlan 1 ip address xx.xx.xx.xx 255.255.255.252 Secondary exit wr mem thank you

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• Block Skype on Cisco IOS

  - by ensnare

  I'm trying to block skype via policy routing but it's not working ... here's my configuration: class-map match-any block match protocol skype policy-map QoS-Priority-Input class block police 1000000 31250 31250 conform-action drop exceed-action drop violate-action drop policy-map QoS-Priority-Output class block police 1000000 31250 31250 conform-action drop exceed-action drop violate-action drop interface FastEthernet4 description WAN service-policy input QoS-Priority-Input service-policy output QoS-Priority-Output

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• Network connectivity logs on OSX

  - by Stephen

  I'm trying to determine whether or not Macs store a log of network connectivity. Specifically, I'm trying to find out if one of my machines (Mac Tower, OSX 10.7.4, 2-2.26 GHz, 16 GB DDR3) lost connection to pinpoint an issue. This machine is on an external network where and the IT staff is not very helpful, so I'm trying to ensure that there were network issues rather than some other local issue on that particular machine. Can you pull network logs thru Console that show when a network connection was established and was disconnected?

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• Chrome browser completely messing with network?

  - by kiasecto

  I have a bizare problem with Google Chrome on a intel core i5 running windows 7 32bit. Whenever chrome is installed, access to other computers in the home group becomes really slow - such as opening shares. Its becomes really slow to resolve windows names. Something goes hay-wire with the local network - pining local machines which is usually 0mS pings I get random timeouts and random successes. Whenever I try to load a local address inside of chrome (including localhost, 192.168.0.1 etc) - it always says something in the status bar about resolving proxy and times out after about 5 seconds, then seems to work fine. If I go to settings inside of chrome, it just brings up the internet explorer connection settings, where I have not set any proxy settings. One I uninstall chrome, all these problems go away. Network shares and name resolvings work instantly, pings to any machines never have a problem. Localhost and other network IP address work fine in all other browsers. Anyone heard of this problem before and know what it might be? I even tried re-installing winodws 7 and the problem came straight back when chrome was loaded on again.

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• Web 2.0 online network diagram image generator

  - by JavaRocky

  Does any web 2.0 online network diagram generators exist? Thanks.

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• Geo-DNS providers?

  - by Jason

  We've got a website visited by users mainly in the USA and UK. The site will be run on servers in both these locations. We would like to use a DNS service to direct users to the nearest server, but can't find any. Does anyone have an recommendations for solutions. A cheap, hosted solution would be preferred as we would rather not run our own DNS servers. Cheers!

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• windows 7 wireless knocks off other computers on the network

  - by Sean

  I am trying to fix a wireless network issue. When a new windows 7 machine (we have 2 in the house) we have problems with any other windows xp machines connecting to the wireless network. I am using a linksys WRT110 running Firmware Version: 1.0.04 (which is not the latest firmware its Ver.1.0.07 but the router would not use the bin update file). I have tried a ton of variations in setting for the wireless network, changed the channel, the security level (none, wep wpa, wpa2), network type (g,bg mixed). I have also read some stuff about homegroup settings for windows 7 but have not seen any differences that make a difference. Basically windows 7 does not like to connect to our network but when I manage to get it to work the windows xp pro machines get kicked off. The windows xp pro machines are a few years old but both windows 7 machines are less than 6 months old.

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• Why won't vyatta allow SMTP through my firewall?

  - by Solignis

  I am setting up a vyatta router on VMware ESXi, But I see to have hit a major snag, I could not get my firewall and NAT to work correctly. I am not sure what was wrong with NAT but it "seems" to be working now. But the firewall is not allowing traffic from my WAN interface (eth0) to my LAN (eth1). I can confirm its the firewall because I disabled all firewall rules and everything worked with just NAT. If put the firewalls (WAN and LAN) back in place nothing can get through to port 25. I am not really sure what the issue could be I am using pretty basic firewall rules, I wrote the rules while looking at the vyatta docs so unless there is something odd with the documentation they "should" be working. Here is my NAT rules so far; vyatta@gateway# show service nat rule 20 { description "Zimbra SNAT #1" outbound-interface eth0 outside-address { address 74.XXX.XXX.XXX } source { address 10.0.0.17 } type source } rule 21 { description "Zimbra SMTP #1" destination { address 74.XXX.XXX.XXX port 25 } inbound-interface eth0 inside-address { address 10.0.0.17 } protocol tcp type destination } rule 100 { description "Default LAN -> WAN" outbound-interface eth0 outside-address { address 74.XXX.XXX.XXX } source { address 10.0.0.0/24 } type source } Then here is my firewall rules, this is where I believe the problem is. vyatta@gateway# show firewall all-ping enable broadcast-ping disable conntrack-expect-table-size 4096 conntrack-hash-size 4096 conntrack-table-size 32768 conntrack-tcp-loose enable ipv6-receive-redirects disable ipv6-src-route disable ip-src-route disable log-martians enable name LAN_in { rule 100 { action accept description "Default LAN -> any" protocol all source { address 10.0.0.0/24 } } } name LAN_out { } name LOCAL { rule 100 { action accept state { established enable } } } name WAN_in { rule 20 { action accept description "Allow SMTP connections to MX01" destination { address 74.XXX.XXX.XXX port 25 } protocol tcp } rule 100 { action accept description "Allow established connections back through" state { established enable } } } name WAN_out { } receive-redirects disable send-redirects enable source-validation disable syn-cookies enable SIDENOTE To test for open ports I have using this website, http://www.yougetsignal.com/tools/open-ports/, it showed port 25 as open without the firewall rules and closed with the firewall rules. UPDATE Just to see if the firewall was working properly I made a rule to block SSH from the WAN interface. When I checked for port 22 on my primary WAN address it said it was still open even though I outright blocked the port. Here is the rule I used; rule 21 { action reject destination { address 74.219.80.163 port 22 } protocol tcp } So now I am convinced either I am doing something wrong or the firewall is not working like it should.

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