[KLUG Members] Can't ping IPCop!

Mike Morrett members@kalamazoolinux.org
Wed, 15 Jan 2003 20:33:40 -0500


My home network…

IP
address
-------
DHCP   PC1 (W2K or BSWare)        ---\
DHCP   PC2 (W2K)                       ----\
DHCP   PC3 (W98se)                    -----> [HUB] -> IPCOP -> Modem ->
Al Gore's Internet
Static  SRV (RH 7.3 + Samba)       ----/   
Static  HP4MV Printer w/JetDirect  ---/

The address for IPCop (v1.2) is 192.168.1.1

I can not "ping ipcop", but "ping -a 192.168.1.1" and "nslookup ipcop"
does work.

C:\TEMP>ping ipcop
Unknown host ipcop.

C:\TEMP>ping -a 192.168.1.1

Pinging ipcop [192.168.1.1] with 32 bytes of data:

Reply from 192.168.1.1: bytes=32 time<10ms TTL=255
Reply from 192.168.1.1: bytes=32 time<10ms TTL=255
Reply from 192.168.1.1: bytes=32 time<10ms TTL=255
Reply from 192.168.1.1: bytes=32 time<10ms TTL=255

Ping statistics for 192.168.1.1:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 0ms, Maximum =  0ms, Average =  0ms

C:\TEMP>nslookup
Default Server:  ipcop
Address:  192.168.1.1

> ipcop
Server:  ipcop
Address:  192.168.1.1

*** No address (A) records available for ipcop
> exit

Why does the name of the IPCop firewall box not get entered into its own
DNS? Is there a way round this?

IPCop is using DNSMASQ and according to
http://thekelleys.org.uk/dnsmasq/doc.html ...

"Dnsmasq will serve names from the /etc/hosts file on the firewall
machine: If the names of local machines are there, then they can all be
addressed without having to maintain /etc/hosts on each machine."

Well, "192.168.1.1 ipcop" is in the /etc/hosts file.

Also, "Dnsmasq caches internet addresses (A records and AAAA records) and
address-to-name mappings (PTR records), reducing the load..."

So, why does nslookup work, but ping does not?

I thought the advantage of DHCP was to automagically assign the IP
Address and DNS Server, and not have to edit the "hosts" file??

C:\TEMP>ipconfig /all

Windows 2000 IP Configuration

        Host Name . . . . . . . . . . . .    : rusty
        Primary DNS Suffix  . . . . . . .   :
        Node Type . . . . . . . . . . . .    : Broadcast
        IP Routing Enabled. . . . . . . .   : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . .  : mydomain.org

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . : mydomain.org
        Description . . . . . . . . . . . : Intel(R) PRO/100+ PCI Adapter
        Physical Address. . . . . . . . : xx-xx-xx-xx-xx-xx
        DHCP Enabled. . . . . . . . . . : Yes
        Autoconfiguration Enabled .  : Yes
        IP Address. . . . . . . . . . . . : 192.168.1.12
        Subnet Mask . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . .  : 192.168.1.1
        DHCP Server . . . . . . . . . .  : 192.168.1.1
        DNS Servers . . . . . . . . . .  : 192.168.1.1
        Lease Obtained. . . . . . . . . : Wednesday, January 15, 2003
        3:57:24 PM
        Lease Expires . . . . . . . . . . : Wednesday, January 22, 2003
        3:57:24 PM

Thanks,
Mike
--
cat /dev/coffee | /dev/cup | /dev/mouth | /dev/nose > /dev/keyboard