** Changed in: isc-dhcp (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/1606051
Title: dhclient fails to get address after latest patches Status in isc-dhcp package in Ubuntu: Confirmed Bug description: From ASkUbuntu entry http://askubuntu.com/questions/801136/recent- patches-broke-dhclient/802390 Running 16.04.01 LTS recently upgraded from 15.10. System is a home firewall with enp1s0 as LAN interface statically assigned and enp2s0 is WAN interface using DHCP, connected to modem. Ran apt-get upgrade and on reboot enp2s0 had no address. running ifdown enp2s0 and then ifup enp2s0 gave me root@sam:~# ifup enp2s0 Internet Systems Consortium DHCP Client 4.3.3 Copyright 2004-2015 Internet Systems Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Listening on LPF/enp2s0/d0:50:99:21:80:f8 Sending on LPF/enp2s0/d0:50:99:21:80:f8 Sending on Socket/fallback DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 3 (xid=0xd998571a) send_packet: Network is down dhclient.c:2098: Failed to send 300 byte long packet over enp2s0 interface. receive_packet failed on enp2s0: Network is down DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 5 (xid=0xd998571a) send_packet: Network is down Running ifconfig enp2s0 up and dhclient enp2s0 gave similar results, but eventually /var/log/syslog showed a dhclient ipv4 lease being obtained - but the enp2s0 had only an IPv6 address, which appears to have come from avahi-daemon. I then manually configured the enp2s0 interface with ifconfig enp2s0 xxx.xxx.xxx.xxx netmask 255.255.248.0 and put in a default route based on the lease info in dhclient.leases and I'm back online. But if I reboot or try to get dhclient to work, I continue to get the network is down errors. apparmor is disabled, so that's not it. iptables is set to allow all DHCP traffic (67/udp and 68/udp) and all RELATED,ESTABLISHED traffic from enp2s0. enp2s0 and enp2s0 are the same hardware. root@sam:~# lshw -class network *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:01:00.0 logical name: enp1s0 version: 01 serial: 04:8d:38:5d:20:17 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm vpd msi pciexpress bus_master cap_list rom ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full ip=yyy.yyy.yyy.yyy latency=0 link=yes multicast=yes port=MII speed=100Mbit/s resources: irq:38 ioport:e000(size=256) memory:ffa00000-ffa00fff memory:ffa20000-ffa3ffff *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 logical name: enp2s0 version: 11 serial: d0:50:99:21:80:f8 size: 1Gbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl8168g-2_0.0.1 02/06/13 ip=xxx.xxx.xxx.xxx latency=0 link=yes multicast=yes port=MII speed=1Gbit/s resources: irq:40 ioport:d000(size=256) memory:ff900000-ff900fff memory:d0800000-d0803fff Ideas? remember, this happened right after patching. networking network-manager dhclient ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: isc-dhcp-client 4.3.3-5ubuntu12.1 ProcVersionSignature: Ubuntu 4.4.0-31.50-generic 4.4.13 Uname: Linux 4.4.0-31-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 Date: Sun Jul 24 15:33:19 2016 InstallationDate: Installed on 2016-03-01 (145 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: isc-dhcp UpgradeStatus: Upgraded to xenial on 2016-06-22 (32 days ago) mtime.conffile..etc.dhcp.debug: 2016-06-28T18:13:33.371977 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1606051/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
