Requesting help with Eth0 issue on Raspbian Jessie

Question

Good evening, This has been an issue that has bothered me for quite a while now. I'm trying to set up my raspberry pi 3 to work via ethernet at my workplace, but it does not seem to work. However, on any windows machine that I have, I get issued an IP address and connect to the internet just fine. The other interesting fact is that if I connect to my work internet via wifi, it has no issue whatsoever. The problem with that is that I am not always within range of using the access point. I tried to be as detailed as possible in getting all the information needed in order to help me resolve my issue: cat /etc/issue Raspbian GNU/Linux 8 
 \l ifconfig eth0 Link encap:Ethernet HWaddr b8:27:eb:7c:21:2b inet addr:192.168.5.147 Bcast:192.168.5.255 Mask:255.255.255.0 inet6 addr: fe80::5456:bf59:aaa2:1ce6/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:696 errors:0 dropped:39 overruns:0 frame:0 TX packets:70 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:56494 (55.1 KiB) TX bytes:7748 (7.5 KiB) 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:65536 Metric:1 RX packets:216 errors:0 dropped:0 overruns:0 frame:0 TX packets:216 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1 RX bytes:18060 (17.6 KiB) TX bytes:18060 (17.6 KiB) iwconfig wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Associated Retry short limit:7 RTS thr:off Fragment thr:off Power Management:on lo no wireless extensions. eth0 no wireless extensions. route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 192.168.5.1 0.0.0.0 UG 202 0 0 eth0 192.168.5.0 0.0.0.0 255.255.255.0 U 202 0 0 eth0 /etc/network/interfaces auto lo iface lo inet loopback iface eth0 inet manual allow-hotplug wlan0 iface wlan0 inet manual wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf allow-hotplug wlan1 iface wlan1 inet manual wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf /etc/resolv.conf nameserver 192.168.5.2 I will be forever thankful if anyone can guide me in the right direction. Thanks!

shabaz · Answer

As well as all the useful information from Rachael and Clem above, it would also be worthwhile checking using the Ethernet connection on your home router. Some work networks will have special policies in place that will not provide LAN access to any device that is not provisioned/permitted by the IT team. Your guest wifi at work may have different policy. If it works on your home router with a wired connection then that could be the case.

rachaelp · Answer

What is the default gateway set as on your Ubuntu/Debian/Pi. That would explain the lack of internet if the default gateway wasn't set up. Alternatively does your company have a proxy for access to the internet which gets set automatically by something in the windows side of the networking if they are using Windows servers? Best Regards, Rachael

rachaelp · Answer

Hi Phillip, You have an IP address assigned for eth0 above. I take it this is not a valid IP for your work network as you mention it working via dhcp and assigning an IP address for the wireless? If this is the case, take a look at /etc/dhcpcd.conf and see how that's configured. Is it set up to give you a static IP address for your home network? Best Regards, Rachael