Solaris 10 Install cannot connect to Internet

archer74 · 07-28-2014, 07:48 AM

Hello everyone,

I am experiencing a technical problem that I cannot resolve with the available threads or by internet searches. This is the first time I've installed Solaris 10 on my ultra45 and I'm having an internet connectivity issue.

I'm connected to a DLINK DSL-G604T modem/router and can ping addresses both external and local addresses including the gateway and DNS but I cannot connect to the internet via the browser.

Code:

# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 10.1.1.245 netmask ffffff00 broadcast 10.1.1.255
        ether 0:14:4f:f:e4:b0

Code:

# cat /etc/resolv.conf
nameserver 10.1.1.1
nameserver 4.2.2.2
nameserver 8.8.8.8

Code:

# cat /etc/defaultrouter
10.1.1.1
bash-3.00#

Code:

# cat /etc/nodename
HALO
bash-3.00#

Code:

# cat /etc/inet/netmasks
#
# The netmasks file associates Internet Protocol (IP) address
# masks with IP network numbers.
#
#       network-number  netmask
#
# The term network-number refers to a number obtained from the Internet Network
# Information Center.
#
# Both the network-number and the netmasks are specified in
# "decimal dot" notation, e.g:
#
#               128.32.0.0 255.255.255.0
#
10.1.1.0     255.255.255.0

Code:

bash-3.00# ping 10.1.1.1
10.1.1.1 is alive
bash-3.00# ping 4.2.2.2
4.2.2.2 is alive
bash-3.00# nslookup google.com
Server:         4.2.2.2
Address:        4.2.2.2#53

Non-authoritative answer:
Name:   google.com
Address: 74.125.239.100
Name:   google.com
Address: 74.125.239.98
Name:   google.com
Address: 74.125.239.102
Name:   google.com
Address: 74.125.239.96

Oddly, I can ping google.com according to

Code:

bash-3.00# ping google.com
google.com is alive

However,

Code:

bash-3.00# ping www.google.com
ping: unknown host www.google.com

Lasty, I've copied nsswitch.dns to nsswitch.conf where

Code:

hosts: files dns

Certainly a perplexing problem that I'm struggling to resolve. Any help I'd be really appreciative.

jlliagre · 07-28-2014, 04:53 PM

It doesn't look like a Solaris issue but a DNS one.

Is www.google.com resolved by the DNS service ?

archer74 · 07-29-2014, 04:23 AM

Thanks for the prompt response.

Yes, www.google.com is resolved by the DNS service assigned to 10.1.1.1 (Modem/router).

Code:

bash-3.00# nslookup www.google.com
Server:         10.1.1.1
Address:        10.1.1.1#53

Non-authoritative answer:
Name:   google.com
Address: 74.125.239.176
Name:   google.com
Address: 74.125.239.177
Name:   google.com
Address: 74.125.239.178
Name:   google.com
Address: 74.125.239.179

To add further confusion, every time I run a secession of the Mozilla or Firefox Web browser the connection now times out on some addresses (e.g. www.google.com, www.gmail.com or www.gizmodo.com.au) while others are fine.

jlliagre · 07-29-2014, 06:33 AM

What says "getent hosts www.google.com" and "ifconfig -a" ?

It might be an IPv6 routing issue so you might want to disable the IPv6 interface to see if it fix the issue.

archer74 · 07-29-2014, 07:10 AM

Regarding the previous querry,

Code:

bash-3.00# getent hosts www.google.com
74.125.239.212 www.google.com
74.125.239.208 www.google.com
74.125.239.209 www.google.com
74.125.239.210 www.google.com

Code:

# ifconfig -a
lo0: flags=2001000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4,VIRTUAL> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 10.1.1.245 netmask ffffff00 broadcast 10.1.1.255
        ether 0:14:4f:f:e4:b0

How do I identify if IPv6 is enabled? I'm positive IPv4 interface is the only one selected and thus active.

jlliagre · 07-29-2014, 07:22 AM

Try removing 10.1.1.1 from /etc/resolv.conf which return a bogus reply.

archer74 · 07-29-2014, 07:56 AM

I can't believe it, the browser is actually now able to resolve addresses with ease. Legendary, thank you!

Code:

# cat /etc/resolv.conf
nameserver 4.2.2.2
nameserver 8.8.8.8

The question now is why? Would this likely be a modem/router issue?

jlliagre · 07-29-2014, 08:28 AM

The DNS service returned a bogus reply. If it is implemented by the modem/router, that's indeed where to investigate. You should also look to your ISP DNS, assuming this is where your router takes its information from.

archer74 · 07-30-2014, 08:33 AM

I did a little more investigating and came across an interesting thread that mentioned for Solaris 10 and older distributions may require the MTU/MSS interface to be reconfigured for a smaller value.

I wanted to see if my local gateway/DNS (modem/router) 10.1.1.1 was at fault. So I returned to the original resolv.conf and tried the following script

Code:

ping -s 203.173.50.151 1492
^C
PING 203.173.50.151: 1492 data bytes
----203.173.50.151 PING Statistics----
3 packets transmitted, 0 packets received, 100% packet loss

Then I decreased the data packet size until the following result

Code:

ping -s 203.173.50.151 1464
^C
PING 203.173.50.151: 1464 data bytes
1472 bytes from www.iinet.net.au (203.173.50.151): icmp_seq=0. time=30.6 ms
1472 bytes from www.iinet.net.au (203.173.50.151): icmp_seq=1. time=29.5 ms
1472 bytes from www.iinet.net.au (203.173.50.151): icmp_seq=2. time=29.4 ms
----203.173.50.151 PING Statistics----
3 packets transmitted, 3 packets received, 0% packet loss
round-trip (ms)  min/avg/max/stddev = 29.4/29.8/30.6/0.65

Given my modem/router has the below config could this be also a connecting reason or must sun systems with solaris 10 require an MTU of 1464 data bytes?

Code:

Dlink Router
MTU: 1400 bytes
MTU: 1492 bytes