[gPXE] Not able to access Internet with sanboot

Andy Chen andychen_ca at hotmail.com
Wed Feb 17 15:16:19 EST 2010 

Hi Stefan,

Thank you for the help.
My NetworkManager shows that the wired and wireless network "device not managed" after iscsi boot but is normal while not using iscsi boot.
that is why I think might be something wrong with iscsi boot.
 
Below is the information gathered after iscsi boot for your review:

[root at localhost Bell]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:13:D4:94:CD:F7  
          inet addr:192.168.1.27  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::213:d4ff:fe94:cdf7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:141571 errors:0 dropped:0 overruns:0 frame:0
          TX packets:84597 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:197503140 (188.3 MiB)  TX bytes:17356551 (16.5 MiB)
          Interrupt:20 

eth1      Link encap:Ethernet  HWaddr 00:15:00:0C:92:4E  
          inet6 addr: fe80::215:ff:fe0c:924e/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 b)  TX bytes:432 (432.0 b)
          Interrupt:22 Base address:0x4000 Memory:fa9ff000-fa9fffff 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:480 (480.0 b)  TX bytes:480 (480.0 b)

[root at localhost Bell]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
[root at localhost Bell]# cat /etc/resolv.conf
# Generated by NetworkManager


# No nameservers found; try putting DNS servers into your
# ifcfg files in /etc/sysconfig/network-scripts like so:
#
# DNS1=xxx.xxx.xxx.xxx
# DNS2=xxx.xxx.xxx.xxx
# DOMAIN=lab.foo.com bar.foo.com
[root at localhost Bell]# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:80 
REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
ACCEPT     icmp --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           
REJECT     all  --  0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination   


Thanks,
Andy

> Date: Wed, 17 Feb 2010 19:32:10 +0000
> Subject: Re: [gPXE] Not able to access Internet with sanboot
> From: stefanha at gmail.com
> To: andychen_ca at hotmail.com
> CC: gpxe at etherboot.org
> 
> On Wed, Feb 17, 2010 at 6:29 PM, Andy Chen <andychen_ca at hotmail.com> wrote:
> > I boot FC12 from sanboot with gpxe 1.0.0.
> > It works perfect except seems to me that the network is occupied by iscsi
> > and not share with FireFox brower cause it not able to access internet.
> > Anybody has experienced this?
> > Appreciate your help in advance.
> 
> This is most likely not an iSCSI issue and at this stage of execution
> gPXE is no longer being used.  This is a Linux network configuration
> issue.
> 
> iSCSI uses a TCP connection.  So in order for iSCSI to work, part of
> your network configuration must be correct.  Perhaps DNS is not set up
> and Firefox isn't able to look up of domain names?
> 
> You can test this by trying to ping google.com to see if ping resolves
> the IP address:
> $ ping google.com
> PING google.com (209.85.227.106) 56(84) bytes of data.
> 64 bytes from wy-in-f106.1e100.net (209.85.227.106): icmp_seq=1 ttl=54
> time=32.1 ms
> 
> The "google.com (209.85.227.106)" output shows me that ping was able
> to resolve "google.com" to an IP address.  If ping cannot look up
> "google.com" then DNS is not set up.
> 
> A few commands to check the network configuration:
> /sbin/ifconfig
> /sbin/route -n
> cat /etc/resolv.conf
> iptables -L -n   (needs to be run as root, e.g. use sudo)
> 
> If you post the output of these commands we should have a clearer
> picture of what is missing.
> 
> Stefan
 		 	   		  
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