#18103: vpn only works after unplugging lan cable
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Reporter: anon1 | Owner: developers
Type: defect | Status: new
Priority: normal | Milestone: Barrier Breaker 14.07
Component: packages | Version: Barrier Breaker 14.07
Keywords: |
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Tried on both TL wr710n and 841n routers. 14.07 final. An Openvpn setup
that has worked on previous AA no problem, and similar to wiki page here -
there are no unusual firewall settings.
The vpn connects ok - and a WiFi br-lan connection works well.
The problem is that there is only local access on the wired part of br-
lan. There is access to Luci via ip address and a few bytes goes through
to an internal IP on the VPN end, before freezing. This happens even while
the wireless br-lan connection is working 100%.
The problem is resolved only by briefly unplugging and replugging the lan
cable. It only needs to be done once and restarts of the vpn are not
affected unless the router is powered down. I have tried simulating this
as a workaround with ifup lan and ifconfig eth1 down/up, but this knocks
over the wan (eth0) also, breaking the network.
Is there a way to trigger an equivalent to the physical hotplug event for
lan/eth1 as a temporary workaround?
Note: The build has had ipv6 completely removed with imagebuilder:
''make image PROFILE=TLWR710 PACKAGES="luci openvpn-polarssl kmod-ipt-
nathelper-extra kmod-ipt-conntrack-extra -ip6tables -kmod-ip6tables -kmod-
ipv6 -libip6tc -odhcp6c -odhcpd"''
Sysctl.conf and /etc/config firewall, network have had references removed.
"dnsmasq" is restarted with no changes to dhcp (temporarily
disabling/enabling dns only) before and after the vpn is up.
On both routers, everything works well both on wifi, and after physically
replugging the cable. There is nothing unusual on the system or kernel
logs, just this upon replug and it works:
daemon.notice netifd: Network device 'eth1' link is down
kern.info kernel: [ 456.860000] eth1: link down
kern.info kernel: [ 456.860000] br-lan: port 1(eth1) entered disabled
state
kern.info kernel: [ 458.360000] eth1: link up (1000Mbps/Full duplex)
kern.info kernel: [ 458.360000] br-lan: port 1(eth1) entered forwarding
state
kern.info kernel: [ 458.370000] br-lan: port 1(eth1) entered forwarding
state
daemon.notice netifd: Network device 'eth1' link is up
kern.info kernel: [ 460.370000] br-lan: port 1(eth1) entered forwarding
state
daemon.info dnsmasq-dhcp[1309]: DHCPREQUEST(br-lan) 192.168.
daemon.info dnsmasq-dhcp[1309]: DHCPACK(br-lan) 192.168.
daemon.info dnsmasq-dhcp[1309]: DHCPINFORM(br-lan) 192.168.
daemon.info dnsmasq-dhcp[1309]: DHCPACK(br-lan) 192.168.
--
Ticket URL: <https://dev.openwrt.org/ticket/18103>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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