I have a new, fairly vanilla install of LEDE/OpenWRT on a TP-Link WR902AC.
I'm connecting to a work VPN (OpenVPN) with a client on my LAN. The VPN connection works fine and I can access resources by IP, but name resolution doesn't work at all. Note that with the stock firmware everything worked fine, so I can rule out an OpenVPN configuration issue.
I've tried setting option localservice 0 as per https://forum.openwrt.org/viewtopic.php?pid=290484#p290484, but it didn't make any difference.
Then I started going down the following rabbit hole:
I've tried installing opkg install kmod-nf-nathelper-extra as per https://wiki.openwrt.org/doc/howto/vpn.nat.pptp, but it tells me:
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for kmod-nf-nathelper-extra:
* kernel (= 4.9.82-1-06fb3cb2af8460985ccf8ee4f44c1fe8) * kernel (= 4.9.82-1-06fb3cb2af8460985ccf8ee4f44c1fe8) *
* opkg_install_cmd: Cannot install package kmod-nf-nathelper-extra.
My kernel appears to be at the correct version:
root@OpenWrt:~# uname -r
4.9.82
I've tried opkg install kmod-nf-nathelper-extra --force-depends, and that appears to install a couple of packages, but still gives me the error:
root@OpenWrt:~# opkg install kmod-nf-nathelper-extra --force-depends
Installing kmod-nf-nathelper-extra (4.9.82-1) to root...
Downloading http://downloads.lede-project.org/snapshots/targets/ar71xx/generic/packages/kmod-nf-nathelper-extra_4.9.82-1_mips_24kc.ipk
Installing kmod-lib-textsearch (4.9.82-1) to root...
Downloading http://downloads.lede-project.org/snapshots/targets/ar71xx/generic/packages/kmod-lib-textsearch_4.9.82-1_mips_24kc.ipk
Configuring kmod-lib-textsearch.
Configuring kmod-nf-nathelper-extra.
Collected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for kmod-nf-nathelper-extra:
* kernel (= 4.9.82-1-06fb3cb2af8460985ccf8ee4f44c1fe8) * kernel (= 4.9.82-1-06fb3cb2af8460985ccf8ee4f44c1fe8) *
I tried rebooting the router after that, since it didn't actually say "Cannot install", but VPN name resolution still isn't working. I'm not even sure that package is what I need to resolve my issue, but it's all trial-and-error at this point.
I tried iptables -A PREROUTING -t raw -p tcp --dport 1723 -j CT --helper pptp from http://forum.openwrt.org/viewtopic.php?pid=364831#p364831 (sorry I can't link that - new users only get 2 links per post), but i get
iptables v1.6.1: can't initialize iptables table `raw': Table does not exist (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.
Which lead to:
root@OpenWrt:~# opkg install kmod-ipt-raw
Unknown package 'kmod-ipt-raw'.
Collected errors:
* opkg_install_cmd: Cannot install package kmod-ipt-raw.
I am truly at a loss and don't know what to do. Any help would be greatly appreciated.