newbie questions about VPN and OpenDNS

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emanon
DD-WRT Novice


Joined: 25 Oct 2019
Posts: 38

PostPosted: Tue Oct 29, 2019 16:25    Post subject: newbie questions about VPN and OpenDNS Reply with quote
If a VPN service such as ExpressVPN or IPVanish is added to the ddwrt router, each client then accesses the internet masqueraded behind the VPN service? If so, does this mean kids could access adult sites? If so, can OpenDNS be used simultaneously with VPN to prevent kids from accessing inappropriate sites while using a VPN?
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 5540
Location: Netherlands

PostPosted: Tue Oct 29, 2019 16:37    Post subject: Reply with quote
You can use what DNS servers you want, with or without VPN.
_________________
Routers:Netgear R7800, Netgear R6400v1, Netgear R6400v2, Linksys EA6900 (XvortexCFE), Linksys E2000 (converted WRT320N), WRT54GS v1.
Install guide Linksys EA6900: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=291230
OpenVPN Policy Based Routing guide: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=321686
Install guide R6400v2:http://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
OpenVPN Server Setup:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=318795
Install guide R7800: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Wireguard server setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1183135
Wireguard client setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324624
Wireguard Advanced setup guide:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324787
emanon
DD-WRT Novice


Joined: 25 Oct 2019
Posts: 38

PostPosted: Tue Oct 29, 2019 16:41    Post subject: Reply with quote
egc wrote:
You can use what DNS servers you want, with or without VPN.


Ok I might try it.
emanon
DD-WRT Novice


Joined: 25 Oct 2019
Posts: 38

PostPosted: Tue Oct 29, 2019 20:26    Post subject: Reply with quote
I now have VPN working. IPVanish has instructions on their site to add it to ddwrt. The instructions worked perfectly. However, according to speed checker in ddwrt , my speed has drastically fallen and I can tell the difference when streaming via Hulu. Here are the before and after tests. Should this be happening?


Screen Shot 2019-10-29 at 11.31.02 AM.png
 Description:
Speed Test before VPN install
 Filesize:  177.2 KB
 Viewed:  874 Time(s)

Screen Shot 2019-10-29 at 11.31.02 AM.png



Screen Shot 2019-10-29 at 2.59.15 PM.png
 Description:
Speed Test after VPN install
 Filesize:  192.86 KB
 Viewed:  874 Time(s)

Screen Shot 2019-10-29 at 2.59.15 PM.png


bushant
DD-WRT Guru


Joined: 18 Nov 2015
Posts: 1380

PostPosted: Tue Oct 29, 2019 22:39    Post subject: Reply with quote
Depends what your router is. And encryption level to some degree.
So that may be about right.

More CPU speed = more VPN speed.

R7800 at 1700MHz may do around 90Mb/s.
emanon
DD-WRT Novice


Joined: 25 Oct 2019
Posts: 38

PostPosted: Tue Oct 29, 2019 22:49    Post subject: Reply with quote
bushant wrote:
Depends what your router is. And encryption level to some degree.
So that may be about right.

More CPU speed = more VPN speed.

R7800 at 1700MHz may do around 90Mb/s.


I am using an R7000 which has a 1.0 GHz dual-core processor. Look at the speed before VPN. It was greater than 100 Mbps. That's an 80% reduction in speed! That's too large of a reduction just because VPN was added isn't it?

I think I will remove VPN and just use IPVanish on my computer when I want to use it. Out here in the rural area where I live 100Mbps (which is what I was getting before installing VPN) is a proud-possession. No one in the house wants to go back to our days when we only received 20Mbps!
Alozaros
DD-WRT Guru


Joined: 16 Nov 2015
Posts: 3573
Location: UK, London, just across the river..

PostPosted: Wed Oct 30, 2019 7:52    Post subject: Reply with quote
yep VPN on R7000 (depends from encryption) you will get
around 40Mbit max....
Bett use VPN on PC level instead...

Once you feel more confident with DDWRT, you can click on the red link in my sig to harden DNS over TLS.....

_________________
Atheros
TP-Link WR740Nv1 ------DD-WRT 43261 BS WAP/Switch
TP-Link WR740Nv4 ------DD-WRT 43028 BS AP,NAT
TP-Link WR1043NDv2 ----DD-WRT 42287 BS AP,NAT,AD Block,AP Isolation,Firewall,Local DNS,Forced DNS,DoT,VPN
TP-Link WR1043NDv2 ----DD-WRT 43261 BS AP,NAT,AD Block,Firewall,Local DNS,Forced DNS,DoT,VPN
TP-Link WR1043NDv2 ----Gargoyle OS 1.12.0 AP,NAT,QoS,Quotas
Qualcomm/IPQ8065
Netgear R7800 -------DD-WRT 43290 BS AP,NAT,AD-Block,AP&Net Isolation,VLAN's,Firewall,Local DNS,DoT
Broadcom
Netgear R7000 -------DD-WRT 43290 BS AP,Wi-Fi OFF,NAT,AD-Block,Firewall,Local DNS,Forced DNS,DoT,VPN
------------------------------------------------------------------------------------------------
Stubby for DNS over TLS I DNSCrypt v2 via Entware by mac913
emanon
DD-WRT Novice


Joined: 25 Oct 2019
Posts: 38

PostPosted: Wed Oct 30, 2019 8:51    Post subject: Reply with quote
That is too slow for my household needs. I have disabled the VPN.
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