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No internet access - destination port unreachableHI all,
Getting a strange problem here. Got about 120 computers, all from the same unattended windows build, all picking up IP configuation from the same DHCP range, and one of them, is giving 'destination port unreachable' errors when trying to ping external addresses, either by name or IP. The machine can't see anything external to the company network (using anything - have tried ping, IE6, telnet.exe), and I don't know why. I've disabled NetBIOS over TCP/IP, I've removed the connection on the XP machine, removed the adapter in device manager, re-installed the lot and the same thing happens. Any pointers would be most gratefully appreciated, as I'm out of ideas. Use tracert command to trace where the traffic to. Or these search results may help,
troubleshooting ping issues ping 4.2.2.1 Pinging 4.2.2.1 with 32 bytes of data: Reply from 209.165.105.129: Destination net unreachable. Causes: If you have incorrect IPSec settings, ... www.chicagotech.net/troubleshootingping.htm routing issues on vpn TTL expired in transit and Destination host unreachable. Can ping VPN server only but not other resources. Symptom: after establishing VPN, you can ping and ... www.chicagotech.net/routingissuesonvpn.htm Bob Lin, MS-MVP, MCSE & CNE Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com "Adam Thompson" <adw***@gmail.com> wrote in message news:1163513322.516314.22170@i42g2000cwa.googlegroups.com... HI all,Getting a strange problem here. Got about 120 computers, all from the same unattended windows build, all picking up IP configuation from the same DHCP range, and one of them, is giving 'destination port unreachable' errors when trying to ping external addresses, either by name or IP. The machine can't see anything external to the company network (using anything - have tried ping, IE6, telnet.exe), and I don't know why. I've disabled NetBIOS over TCP/IP, I've removed the connection on the XP machine, removed the adapter in device manager, re-installed the lot and the same thing happens. Any pointers would be most gratefully appreciated, as I'm out of ideas. Thanks for the suggestions, but neither seem to be applicable, as this
connection doesn't use IPSec or any kind of VPN connection. Robert L [MVP - Networking] wrote: Show quoteHide quote > Use tracert command to trace where the traffic to. Or these search results may help, > > troubleshooting ping issues ping 4.2.2.1 Pinging 4.2.2.1 with 32 bytes of data: Reply from 209.165.105.129: Destination net unreachable. Causes: If you have incorrect IPSec settings, ... > www.chicagotech.net/troubleshootingping.htm > > > routing issues on vpn TTL expired in transit and Destination host unreachable. Can ping VPN server only but not other resources. Symptom: after establishing VPN, you can ping and ... > www.chicagotech.net/routingissuesonvpn.htm > > > > Bob Lin, MS-MVP, MCSE & CNE > Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net > How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com > "Adam Thompson" <adw***@gmail.com> wrote in message news:1163513322.516314.22170@i42g2000cwa.googlegroups.com... > HI all, > > Getting a strange problem here. Got about 120 computers, all from the > same unattended windows build, all picking up IP configuation from the > same DHCP range, and one of them, is giving 'destination port > unreachable' errors when trying to ping external addresses, either by > name or IP. > > The machine can't see anything external to the company network (using > anything - have tried ping, IE6, telnet.exe), and I don't know why. > > I've disabled NetBIOS over TCP/IP, I've removed the connection on the > XP machine, removed the adapter in device manager, re-installed the lot > and the same thing happens. > > Any pointers would be most gratefully appreciated, as I'm out of ideas. > > ------=_NextPart_000_006E_01C707E1.FFF04180 > Content-Type: text/html; charset=iso-8859-1 > Content-Transfer-Encoding: quoted-printable > X-Google-AttachSize: 3365 > > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> > <HTML><HEAD> > <META http-equiv=Content-Type content="text/html; charset=iso-8859-1"> > <META content="MSHTML 6.00.2900.2963" name=GENERATOR> > <STYLE></STYLE> > </HEAD> > <BODY bgColor=#ffffff> > <DIV>Use tracert command to trace where the traffic to. Or these search results > may help,</DIV> > <DIV> </DIV> > <DIV> > <P class=g><A class=l > href="http://www.chicagotech.net/troubleshootingping.htm"><FONT > color=#663399>troubleshooting <B>ping</B> issues</FONT></A> > <TABLE cellSpacing=0 cellPadding=0 border=0> > <TBODY> > <TR> > <TD class=j><FONT size=-1><B>ping</B> 4.2.2.1 Pinging 4.2.2.1 with 32 > bytes of data: Reply from 209.165.105.129: <B>Destination</B> net > <B>unreachable</B>. Causes: If you have incorrect IPSec settings, > <B>...</B><BR><SPAN class=a><FONT color=#008000><A > href="http://www.chicagotech.net/troubleshootingping.htm">www.chicagotech.net/troubleshooting<B>ping</B>.htm</A> > </FONT></SPAN></FONT></TD></TR></TBODY></TABLE> > <P class=g><A class=l > href="http://www.chicagotech.net/routingissuesonvpn.htm"><FONT > color=#663399>routing issues on vpn</FONT></A> > <TABLE cellSpacing=0 cellPadding=0 border=0> > <TBODY> > <TR> > <TD class=j><FONT size=-1>TTL expired in transit and <B>Destination</B> > host <B>unreachable</B>. Can <B>ping</B> VPN server only but not other > resources. Symptom: after establishing VPN, you can <B>ping</B> and > <B>...</B><BR><SPAN class=a><FONT color=#008000><A > href="http://www.chicagotech.net/routingissuesonvpn.htm">www.chicagotech.net/routingissuesonvpn.htm</A> > </FONT></SPAN></FONT></TD></TR></TBODY></TABLE></P></DIV> > <DIV><BR>Bob Lin, MS-MVP, MCSE & CNE<BR>Networking, Internet, Routing, VPN > Troubleshooting on <A > href="http://www.ChicagoTech.net">http://www.ChicagoTech.net</A> <BR>How to > Setup Windows, Network, VPN & Remote Access on <A > href="http://www.HowToNetworking.com">http://www.HowToNetworking.com</A> </DIV> > <BLOCKQUOTE > style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> > <DIV>"Adam Thompson" <<A > href="mailto:adw***@gmail.com">adw***@gmail.com</A>> wrote in message <A > href="news:1163513322.516314.22***@i42g2000cwa.googlegroups.com">news:1163513322.516314.22170@i42g2000cwa.googlegroups.com</A>...</DIV>HI > all,<BR><BR>Getting a strange problem here. Got about 120 computers, all > from the<BR>same unattended windows build, all picking up IP configuation from > the<BR>same DHCP range, and one of them, is giving 'destination > port<BR>unreachable' errors when trying to ping external addresses, either > by<BR>name or IP.<BR><BR>The machine can't see anything external to the > company network (using<BR>anything - have tried ping, IE6, telnet.exe), and I > don't know why.<BR><BR>I've disabled NetBIOS over TCP/IP, I've removed the > connection on the<BR>XP machine, removed the adapter in device manager, > re-installed the lot<BR>and the same thing happens.<BR><BR>Any pointers would > be most gratefully appreciated, as I'm out of > ideas.<BR></BLOCKQUOTE></BODY></HTML> > > ------=_NextPart_000_006E_01C707E1.FFF04180-- Adam Thompson wrote:
href="news:1163513322.516314.22***@i42g2000cwa.googlegroups.com">news:1163513322.516314.22170@i42g2000cwa.googlegroups.com</A>...</DIV>HI Very odd this - still not entirely sure why it happened in the first> > all,<BR><BR>Getting a strange problem here. Got about 120 computers, all > > from the<BR>same unattended windows build, all picking up IP configuation from > > the<BR>same DHCP range, and one of them, is giving 'destination > > port<BR>unreachable' errors when trying to ping external addresses, either > > by<BR>name or IP.<BR><BR>The machine can't see anything external to the > > company network (using<BR>anything - have tried ping, IE6, telnet.exe), and I > > don't know why.<BR><BR>I've disabled NetBIOS over TCP/IP, I've removed the > > connection on the<BR>XP machine, removed the adapter in device manager, > > re-installed the lot<BR>and the same thing happens. place. I set off another build on the PC, so the whole disk would have been wiped, Windows re-installed, and the apps would have been re-deployed either by GP or Altiris. I logged on for the first time, and the same thing was happening again! I compared routing tables, and saw one entry was different, and sure enough, traces to the outside world were taking a different path. The IP was assigned by DHCP (same server and scope as all the other working machines). I released the IP of the machine (which was presumably the same again, since the MAC address wouldn't have changed), and checked on the server that nothing was leased to that machine. Rebooted the machine, it picked up its IP configuration from the DHCP server again, and everything worked. Still scratching my head, but at least it's fixed. Thanks for the suggestions, Adam. 
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