summary: I'm running an SSL VPN from an LMDE host through a Debian jumpbox. After I [start the server, start the client] most IP-based applications seem to work from the client, but web browsing fails: e.g., client's Firefox cannot connect to http://www.whatismyip.com/ . How to fix or debug?
details: (Apologies in advance if you feel this is a question better asked elsewhere. If so, please let me know where to ask. The OpenVPN forums are quite slow to respond in my experience, hence I'm asking here first.) I have a laptop running up-to-date LMDE (`cat /etc/debian_version`=='jessie/sid'), including Firefox version=33.0. From that laptop I need to access a compute cluster. The cluster formerly required only an SSL VPN (enabled by a Firefox plugin) to access, but now has several additional requirements, which I seek to satisfy by running the SSL VPN through a jumpbox running an OpenVPN server. The jumpbox is a linode running a "vanilla" Debian (`cat /etc/debian_version`=='7.7'). Note that I have been using the laptop successfully for a few years with LMDE and without network problems. Currently I have the client/laptop connected by wire directly to an ISP-supplied modem/router. With `openvpn` NOT running on my client/laptop, I see the following: * `ifconfig` shows no entry='tun0' (just "the usual" entries for 'eth0', 'lo', 'wlan0'), and shows the expected client IP# bound to 'eth0'. * I can `ping` my jumpbox/server using its real IP#, but cannot `ping 10.8.0.1` * I can `ssh` to my jumpbox/server using its real IP#, but cannot `ssh 10.8.0.1` * `nslookup www.whatismyip.com` gives correct results * browsing to http://www.whatismyip.com/ shows my client's IP# (as also shown in `ifconfig`) Both the client and server setups are quite generic OpenVPN-wise, and are almost exactly as described on the Debian wiki here https://wiki.debian.org/openvpn%20for%20server%20and%20client Note particularly that my client and server configurations are currently near-exact copies of those listed at that Debian wiki page: the only changes are my server IP# (obfuscated below) and the name of my client: me@jumpbox:~$ date ; cat /etc/openvpn/server.conf Sat Nov 8 16:49:00 EST 2014 port 1194 proto udp dev tun ca /etc/openvpn/ca.crt cert /etc/openvpn/server.crt key /etc/openvpn/server.key dh /etc/openvpn/dh1024.pem server 10.8.0.0 255.255.255.0 ifconfig-pool-persist ipp.txt push "redirect-gateway def1 bypass-dhcp" push "dhcp-option DNS 8.8.8.8" # google public DNS keepalive 10 120 comp-lzo user nobody group nogroup persist-key persist-tun status openvpn-status.log verb 3 me@laptop:~$ date ; cat /etc/openvpn/client1.conf Sat Nov 8 16:51:31 EST 2014 client dev tun proto udp remote ser.ver.IP.num 1194 resolv-retry infinite nobind user nobody group nogroup persist-key persist-tun mute-replay-warnings ca /etc/openvpn/ca.crt cert /etc/openvpn/client1.crt key /etc/openvpn/client1.key ns-cert-type server comp-lzo verb 3 up /etc/openvpn/update-resolv-conf down /etc/openvpn/update-resolv-conf My current problem is that I seem unable to browse the web through the VPN, though other IP-based functionality works. After I start `openvpn` on first the server and then the client, I see no OpenVPN errors on either the server or the client: me@jumpbox:~$ sudo openvpn --script-security 2 --config /etc/openvpn/server.conf & Sat Nov 8 17:48:25 2014 OpenVPN 2.2.1 x86_64-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Jun 18 2013 Sat Nov 8 17:48:25 2014 NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Sat Nov 8 17:48:25 2014 Diffie-Hellman initialized with 1024 bit key Sat Nov 8 17:48:25 2014 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ] Sat Nov 8 17:48:25 2014 Socket Buffers: R=[212992->131072] S=[212992->131072] Sat Nov 8 17:48:25 2014 ROUTE default_gateway=ser.ver.gate.way Sat Nov 8 17:48:25 2014 TUN/TAP device tun0 opened Sat Nov 8 17:48:25 2014 TUN/TAP TX queue length set to 100 Sat Nov 8 17:48:25 2014 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Sat Nov 8 17:48:25 2014 /sbin/ifconfig tun0 10.8.0.1 pointopoint 10.8.0.2 mtu 1500 Sat Nov 8 17:48:25 2014 /sbin/route add -net 10.8.0.0 netmask 255.255.255.0 gw 10.8.0.2 Sat Nov 8 17:48:25 2014 Data Channel MTU parms [ L:1542 D:1450 EF:42 EB:135 ET:0 EL:0 AF:3/1 ] Sat Nov 8 17:48:25 2014 GID set to nogroup Sat Nov 8 17:48:25 2014 UID set to nobody Sat Nov 8 17:48:25 2014 UDPv4 link local (bound): [undef] Sat Nov 8 17:48:25 2014 UDPv4 link remote: [undef] Sat Nov 8 17:48:25 2014 MULTI: multi_init called, r=256 v=256 Sat Nov 8 17:48:25 2014 IFCONFIG POOL: base=10.8.0.4 size=62, ipv6=0 Sat Nov 8 17:48:25 2014 ifconfig_pool_read(), in='TomRoche,10.8.0.4', TODO: IPv6 Sat Nov 8 17:48:25 2014 succeeded -> ifconfig_pool_set() Sat Nov 8 17:48:25 2014 IFCONFIG POOL LIST Sat Nov 8 17:48:25 2014 TomRoche,10.8.0.4 Sat Nov 8 17:48:25 2014 Initialization Sequence Completed me@laptop:~$ sudo openvpn --script-security 2 --config /etc/openvpn/client1.conf & Sat Nov 8 17:49:12 2014 NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Sat Nov 8 17:49:12 2014 Socket Buffers: R=[212992->131072] S=[212992->131072] Sat Nov 8 17:49:12 2014 NOTE: UID/GID downgrade will be delayed because of --client, --pull, or --up-delay Sat Nov 8 17:49:12 2014 UDPv4 link local: [undef] Sat Nov 8 17:49:12 2014 UDPv4 link remote: [AF_INET]jump.box.IP.num:1194 Sat Nov 8 17:49:12 2014 TLS: Initial packet from [AF_INET]jump.box.IP.num:1194, sid=25df7af6 0ece4089 Sat Nov 8 17:49:13 2014 VERIFY OK: depth=1, <my config data/> Sat Nov 8 17:49:13 2014 VERIFY OK: nsCertType=SERVER Sat Nov 8 17:49:13 2014 VERIFY OK: depth=0, <my config data/> Sat Nov 8 17:49:14 2014 Data Channel Encrypt: Cipher 'BF-CBC' initialized with 128 bit key Sat Nov 8 17:49:14 2014 Data Channel Encrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Nov 8 17:49:14 2014 Data Channel Decrypt: Cipher 'BF-CBC' initialized with 128 bit key Sat Nov 8 17:49:14 2014 Data Channel Decrypt: Using 160 bit message hash 'SHA1' for HMAC authentication Sat Nov 8 17:49:14 2014 Control Channel: TLSv1, cipher TLSv1/SSLv3 DHE-RSA-AES256-SHA, 1024 bit RSA Sat Nov 8 17:49:14 2014 [TomRoche] Peer Connection Initiated with [AF_INET]jump.box.IP.num:1194 Sat Nov 8 17:49:16 2014 SENT CONTROL [TomRoche]: 'PUSH_REQUEST' (status=1) Sat Nov 8 17:49:16 2014 PUSH: Received control message: 'PUSH_REPLY,redirect-gateway def1 bypass-dhcp,dhcp-option DNS 8.8.8.8,route 10.8.0.1,topology net30,ping 10,ping-restart 120,ifconfig 10.8.0.6 10.8.0.5' Sat Nov 8 17:49:16 2014 OPTIONS IMPORT: timers and/or timeouts modified Sat Nov 8 17:49:16 2014 OPTIONS IMPORT: --ifconfig/up options modified Sat Nov 8 17:49:16 2014 OPTIONS IMPORT: route options modified Sat Nov 8 17:49:16 2014 OPTIONS IMPORT: --ip-win32 and/or --dhcp-option options modified Sat Nov 8 17:49:16 2014 ROUTE_GATEWAY lap.top.gate.way/255.255.255.0 IFACE=eth0 HWADDR=la:pt:op:MAC:ad:dr Sat Nov 8 17:49:16 2014 TUN/TAP device tun0 opened Sat Nov 8 17:49:16 2014 TUN/TAP TX queue length set to 100 Sat Nov 8 17:49:16 2014 do_ifconfig, tt->ipv6=0, tt->did_ifconfig_ipv6_setup=0 Sat Nov 8 17:49:16 2014 /sbin/ip link set dev tun0 up mtu 1500 Sat Nov 8 17:49:16 2014 /sbin/ip addr add dev tun0 local 10.8.0.6 peer 10.8.0.5 Sat Nov 8 17:49:16 2014 /etc/openvpn/update-resolv-conf tun0 1500 1542 10.8.0.6 10.8.0.5 init dhcp-option DNS 8.8.8.8 Sat Nov 8 17:49:16 2014 /sbin/ip route add lap.top.IP.num/32 via lap.top.gate.way Sat Nov 8 17:49:16 2014 /sbin/ip route add 0.0.0.0/1 via 10.8.0.5 Sat Nov 8 17:49:16 2014 /sbin/ip route add 128.0.0.0/1 via 10.8.0.5 Sat Nov 8 17:49:16 2014 /sbin/ip route add 10.8.0.1/32 via 10.8.0.5 Sat Nov 8 17:49:16 2014 GID set to nogroup Sat Nov 8 17:49:16 2014 UID set to nobody Sat Nov 8 17:49:16 2014 Initialization Sequence Completed I then see the following on my client: * `ifconfig` shows a new entry=`tun0`, which looks correct * I can `ping` the server using either its real IP# or `10.8.0.1` * I can `ssh` to the server using either its real IP# or `10.8.0.1` * `nslookup www.whatismyip.com` gives correct results ... but I get no connection if I open a new instance of Firefox and browse to http://www.whatismyip.com/ :-( "Looking up www.whatismyip.com..." succeeds quickly but the status line continues to display "Connecting to www.whatismyip.com..." until the attempt times out. I also get the same behavior (connection timeout) if I open a new instance of Chrome, or if I browse to http://www.whatismyip.com/ with a Firefox opened prior to starting OpenVPN. FWIW I get the same behavior browsing to any URI, including (e.g.) Google. This is a major problem for me! For the SSL VPN to work, I need to start a Firefox and run it (since the SSL VPN's vendor only supports it on Linux via a Firefox plugin) to access a particular remote-access website. Furthermore I need the SSL VPN to run through the jumpbox/OpenVPN. (Don't ask, it's a long, sad story ...) How can I fix this? Alternatively, what should I do to further debug the problem? your assistance is appreciated, Tom Roche <tom_ro...@pobox.com> -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/87bnoht9dk....@pobox.com
