Networking problems

Networking problems

Post by Jo » Thu, 03 Jul 2003 16:32:48



I can ping IP addresses, but not hostnames.  I'm using the DNS servers
given by our network admin.  It was like pulling teeth to get them to
give me the IPs because "everything is server assigned."  Here's the
output of the various config commands.  Any help would be appreciated.

dmesg:

OpenBSD 3.3 (GENERIC) #44: Sat Mar 29 13:22:05 MST 2003
    dera...@i386.openbsd.org:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: AMD Duron Model 3 (Spitfire) ("AuthenticAMD" 686-class) 831 MHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,SYS,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR
real mem  = 402157568 (392732K)
avail mem = 366829568 (358232K)
using 4278 buffers containing 20209664 bytes (19736K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(5b) BIOS, date 10/19/01, BIOS32 rev. 0 @
0xf0f70
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0x1842
pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xf1770/208 (11 entries)
pcibios0: PCI Interrupt Router at 000:07:0 ("Acer Labs M1543 PCI-ISA"
rev 0x00)
pcibios0: PCI bus #1 is the last bus
bios0: ROM list: 0xc0000/0xa000 0xcc000/0x4000!
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Acer Labs M1647 PCI" rev 0xb0
ppb0 at pci0 dev 1 function 0 "Acer Labs M5247 AGP/PCI-PCI" rev 0x00
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "3DFX Interactive Voodoo3" rev 0x01
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
ohci0 at pci0 dev 2 function 0 "Acer Labs M5237 USB" rev 0x03: irq 9,
OHCI version 1.0, legacy support
usb0 at ohci0: USB revision 1.0
uhub0 at usb0
uhub0: vendor 0x0000 OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 4 ports with 4 removable, self powered
pciide0 at pci0 dev 4 function 0 "Acer Labs M5229 UDMA IDE" rev 0xc4:
DMA, channel 0 configured to compatibility, channel 1 configured to
compatibility
wd0 at pciide0 channel 0 drive 0: <MAXTOR 6L080L4>
wd0: 16-sector PIO, LBA, 76345MB, 16383 cyl, 16 head, 63 sec,
156355584 sectors
wd1 at pciide0 channel 0 drive 1: <Maxtor 92048U8>
wd1: 16-sector PIO, LBA, 19531MB, 16383 cyl, 16 head, 63 sec, 40000464
sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
wd1(pciide0:0:1): using PIO mode 4, Ultra-DMA mode 4
atapiscsi0 at pciide0 channel 1 drive 0
scsibus0 at atapiscsi0: 2 targets
cd0 at scsibus0 targ 0 lun 0: <CREATIVE, DVD-ROM DVD2240E, 1.7A> SCSI0
5/cdrom removable
atapiscsi1 at pciide0 channel 1 drive 1
scsibus1 at atapiscsi1: 2 targets
cd1 at scsibus1 targ 0 lun 0: <LITE-ON, LTR-16101B, TS0N> SCSI0
5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, DMA mode 2
cd1(pciide0:1:1): using PIO mode 4, DMA mode 2
ohci1 at pci0 dev 6 function 0 "Acer Labs M5237 USB" rev 0x03: irq 9,
OHCI version 1.0, legacy support
usb1 at ohci1: USB revision 1.0
uhub1 at usb1
uhub1: vendor 0x0000 OHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
pcib0 at pci0 dev 7 function 0 "Acer Labs M1543 PCI-ISA" rev 0x00
emu0 at pci0 dev 10 function 0 "Creative Labs SoundBlaster Live" rev
0x05: irq 9
ac97: codec id 0x54524123 (TriTech Microelectronics TR28602)
audio0 at emu0
"Creative Labs SoundBlaster Live Digital Input" rev 0x05 at pci0 dev
10 function 1 not configured
"Sigma Designs DVDmagic-PRO" rev 0x02 at pci0 dev 11 function 0 not
configured
xl0 at pci0 dev 13 function 0 "3Com 3c900B 10Mbps" rev 0x04: irq 9
address 00:50:04:cf:d1:02
"Acer Labs M7101 Power Mgmt" rev 0x00 at pci0 dev 17 function 0 not
configured
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
fd1 at fdc0 drive 1: 1.2MB 80 cyl, 2 head, 15 sec
biomask c240 netmask c240 ttymask c2c2
pctr: user-level cycle counter enabled
mtrr: Pentium Pro MTRR support
wd0: no disk label
dkcsum: wd0 matched BIOS disk 80
dkcsum: wd1 matched BIOS disk 81
root on wd1a
rootdev=0x10 rrootdev=0x310 rawdev=0x312
WARNING: / was not properly unmounted
uhub0: port 2, set config at addr 2 failed
uhub0: device problem, disabling port 2
umass0 at uhub0 port 4 configuration 1 interface 0
umass0: PQI Flash Reader, rev 2.00/1.09, addr 2
umass0: using SCSI over BBB-P
scsibus2 at umass0: 2 targets
sd0 at scsibus2 targ 1 lun 0: <Generic, STORAGE DEVICE, 0109> SCSI0
0/direct removable
sd0: drive offline

ifconfig xl0:

xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        address: 00:50:04:cf:d1:02
        media: Ethernet 10baseT (10baseT half-duplex)
        inet6 fe80::250:4ff:fecf:d102%xl0 prefixlen 64 scopeid 0x1
        inet 172.17.38.69 netmask 0xfffff000 broadcast 172.17.47.255

netstat -rn:

Routing tables

Internet:
Destination        Gateway            Flags     Refs     Use    Mtu
Interface
default            172.17.32.1        UGS         0        8      -  
xl0
127/8              127.0.0.1          UGRS        0        0  33224  
lo0
127.0.0.1          127.0.0.1          UH          2        0  33224  
lo0
172.17.32/20       link#1             UC          0        0      -  
xl0
172.17.32.1        0:4:4d:d7:42:0     UHL         1        0      -  
xl0
172.17.32.2        link#1             UHL         1        0      -  
xl0
172.17.32.24       0:3:ba:f:25:3b     UHL         0        1      -  
xl0
172.17.38.69       127.0.0.1          UGHS        0        0  33224  
lo0
172.17.61.24       172.17.32.2        UGHD        0        0      -  
xl0
224/4              127.0.0.1          URS         0        0  33224  
lo0

Internet6:
Destination                        Gateway                      
Flags     Refs     Use    Mtu  Interface
::/104                             ::1                            UGRS
       0        0      -   lo0 =>
::/96                              ::1                            UGRS
       0        0      -   lo0
::1                                ::1                            UH  
      12        0  33224   lo0
::127.0.0.0/104                    ::1                            UGRS
       0        0      -   lo0
::224.0.0.0/100                    ::1                            UGRS
       0        0      -   lo0
::255.0.0.0/104                    ::1                            UGRS
       0        0      -   lo0
::ffff:0.0.0.0/96                  ::1                            UGRS
       0        0      -   lo0
2002::/24                          ::1                            UGRS
       0        0      -   lo0
2002:7f00::/24                     ::1                            UGRS
       0        0      -   lo0
2002:e000::/20                     ::1                            UGRS
       0        0      -   lo0
2002:ff00::/24                     ::1                            UGRS
       0        0      -   lo0
fe80::/10                          ::1                            UGRS
       0        0      -   lo0
fe80::%xl0/64                      link#1                         UC  
       0        0      -   xl0
fe80::250:4ff:fecf:d102%xl0        0:50:4:cf:d1:2                 UHL
       0        0      -   lo0
fe80::%lo0/64                      fe80::1%lo0                    U  
       0        0      -   lo0
fe80::1%lo0                        link#5                         UHL
       0        0      -   lo0
fec0::/10                          ::1                            UGRS
       0        0      -   lo0
ff01::/32                          ::1                            UC  
       0        0      -   lo0
ff02::%xl0/32                      link#1                         UC  
       0        0      -   xl0
ff02::%lo0/32                      ::1                            UC  
       0        0      -   lo0

Encap:
Source             Port  Destination        Port  Proto
SA(Address/Proto/Type/Direction)

 
 
 

Networking problems

Post by Daniel Hartmeie » Thu, 03 Jul 2003 18:05:41



Quote:> I can ping IP addresses, but not hostnames.  I'm using the DNS servers
> given by our network admin.  It was like pulling teeth to get them to
> give me the IPs because "everything is server assigned."  Here's the
> output of the various config commands.  Any help would be appreciated.

Take the IP address of the DNS server you're supposed to use and ping it.
If you can't reach it, either the netmask on your external interface or
the default gateway is wrong (or they just didn't give you the right
address of the DNS server).

Once you can ping the DNS server, run


which should print, among other things,

www.openbsd.org.        86386   IN      A       129.128.5.191

if it doesn't, the DNS server is reachable but not answering your
queries, maybe it's not even a DNS server, wrong IP address, etc.

Once it answers, make sure you enter the name server in your
/etc/resolv.conf:

  nameserver ip.of.dns.server
  lookup file bind

Then run nslookup and enter www.openbsd.org, you should see

Server:         name.of.dns.server
Address:        ip.of.dns.server

Non-authoritative answer:
Name:   www.openbsd.org
Address: 129.128.5.191

If all of this works, you should be able to ping by hostname instead
of by IP address, at least from the box you verified all this on. :)

Daniel

 
 
 

Networking problems

Post by pak.. » Thu, 03 Jul 2003 21:04:25



Quote:> I can ping IP addresses, but not hostnames.  I'm using the DNS servers
> given by our network admin.  It was like pulling teeth to get them to
> give me the IPs because "everything is server assigned."  Here's the
> output of the various config commands.  Any help would be appreciated.

If getting the information out of the network admin is like pulling
teeth, odds favor the network admin having zero clue.

Suggestion.  Instead of asking the network guys, ask the network.

1) Configure the interface for DHCP.
2) Reboot (Or if you know what you're doing, manually unconfigure the,
   interface, delete the default route, and run /etc/netstart)
3) See if the interface came up.  
4) Note
   a) The DNS servers provided by DHCP.
   b) The default route provided by DHCP.
   c) The IP address, netmask, network address, and broadcast address.
5) See if the DNS servers actually work.

 Don't be the least bit surprised if none of the information obtained via
 DHCP matches what the network guys told you.
 Don't be surprised if none of the information obtained (via DHCP or the
 network guys) matches reality.

See the other replies for how to play with 'dig' and 'ping' to see if
DNS is actually working.
--
Chris Dukes
"earthly insanity/brings us conformity
the tinkling bells call me/it plays a leading role
I never could foresee/the purity you stole" -- arte.fa(t's 'Purification'

 
 
 

Networking problems

Post by Jo » Fri, 04 Jul 2003 04:53:04


Well, I'm not sure what DNS servers DHCP is providing, if any.  How do
I find this out?  BTW, I strongly agree with the "clueless admin"
theory.  It's Collegis, go figure!

I can do everything via IP addresses, but so far zippo by DNS.  I
checked /etc/dhclient.conf (?) and it has a line in there to "get DNS
servers."

Thanks for your help so far.  Everything else has gone wonderfully,
xfree configured painlessly (that's a first!)



> > I can ping IP addresses, but not hostnames.  I'm using the DNS servers
> > given by our network admin.  It was like pulling teeth to get them to
> > give me the IPs because "everything is server assigned."  Here's the
> > output of the various config commands.  Any help would be appreciated.

> If getting the information out of the network admin is like pulling
> teeth, odds favor the network admin having zero clue.

> Suggestion.  Instead of asking the network guys, ask the network.

> 1) Configure the interface for DHCP.
> 2) Reboot (Or if you know what you're doing, manually unconfigure the,
>    interface, delete the default route, and run /etc/netstart)
> 3) See if the interface came up.  
> 4) Note
>    a) The DNS servers provided by DHCP.
>    b) The default route provided by DHCP.
>    c) The IP address, netmask, network address, and broadcast address.
> 5) See if the DNS servers actually work.

>  Don't be the least bit surprised if none of the information obtained via
>  DHCP matches what the network guys told you.
>  Don't be surprised if none of the information obtained (via DHCP or the
>  network guys) matches reality.

> See the other replies for how to play with 'dig' and 'ping' to see if
> DNS is actually working.

 
 
 

Networking problems

Post by pak.. » Fri, 04 Jul 2003 07:06:27



Quote:> Well, I'm not sure what DNS servers DHCP is providing, if any.  How do
> I find this out?  BTW, I strongly agree with the "clueless admin"
> theory.  It's Collegis, go figure!

By default dhclient overwrites /etc/resolv.conf if the DHCP response
includes nameservers.

Quote:

> I can do everything via IP addresses, but so far zippo by DNS.  I
> checked /etc/dhclient.conf (?) and it has a line in there to "get DNS
> servers."

-ENOPARSE.  It had a commented out line to "request" "domain-name-servers".
AFAIK requesting domain-name-servers is the default.

--
Chris Dukes
"earthly insanity/brings us conformity
the tinkling bells call me/it plays a leading role
I never could foresee/the purity you stole" -- arte.fa(t's 'Purification'

 
 
 

Networking problems

Post by Jo » Fri, 04 Jul 2003 09:41:22


Clueless admin gave me the wrong DNS servers.  I went into Windows,
typed ipconfig /all, and got the DNS servers.

Thanks all!



> > I can ping IP addresses, but not hostnames.  I'm using the DNS servers
> > given by our network admin.  It was like pulling teeth to get them to
> > give me the IPs because "everything is server assigned."  Here's the
> > output of the various config commands.  Any help would be appreciated.

> If getting the information out of the network admin is like pulling
> teeth, odds favor the network admin having zero clue.

> Suggestion.  Instead of asking the network guys, ask the network.

> 1) Configure the interface for DHCP.
> 2) Reboot (Or if you know what you're doing, manually unconfigure the,
>    interface, delete the default route, and run /etc/netstart)
> 3) See if the interface came up.  
> 4) Note
>    a) The DNS servers provided by DHCP.
>    b) The default route provided by DHCP.
>    c) The IP address, netmask, network address, and broadcast address.
> 5) See if the DNS servers actually work.

>  Don't be the least bit surprised if none of the information obtained via
>  DHCP matches what the network guys told you.
>  Don't be surprised if none of the information obtained (via DHCP or the
>  network guys) matches reality.

> See the other replies for how to play with 'dig' and 'ping' to see if
> DNS is actually working.

 
 
 

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