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#1 2020-06-10 10:47:19

petro2033
Member
Registered: 2018-10-29
Posts: 3

OpenConnect is very slow

I'm using openconnect as an alternative for Cisco AnyConnect, but there is a problem.The connection is very slow, ping is ok, but it seems there is a delay before every request. I've installed openconnect via yaourt and use it like this

sudo openconnect ip_address_here

I've found information that we need to create a tunnel like this

sudo openvpn —mktun —dev tun1

but not sure that's the reason. Maybe there is a kinda config...?

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#2 2020-06-17 02:48:32

heywoodlh
Member
Registered: 2016-10-31
Posts: 22
Website

Re: OpenConnect is very slow

The lack of information makes suggesting any ideas a bit like in shooting in the dark, but here are some questions that might provide some useful information:

1. Have you ruled out that it's not an issue with the Cisco ASA that is providing the connection?

2. Are you in a full tunnel or split tunnel group?

3. What kind of speeds are you looking at before you connect vs after? A simple speedtest before and after may provide some helpful insight.


I've used openconnect (just from the official repositories) on my corporate network and never saw an issue with speed.

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#3 2020-06-17 02:52:55

heywoodlh
Member
Registered: 2016-10-31
Posts: 22
Website

Re: OpenConnect is very slow

Also, AnyConnect does have a Linux client available if you'd rather just use AnyConnect directly. You would have to get the Linux client using your (or your company's) Cisco account.

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#4 2020-06-23 12:47:08

Abaddon
Member
From: Poland
Registered: 2004-05-03
Posts: 246

Re: OpenConnect is very slow

petro2033 wrote:

I've found information that we need to create a tunnel like this

sudo openvpn —mktun —dev tun1

but not sure that's the reason. Maybe there is a kinda config...?

This is not needed. Openconnect will create tun interface automatically.

Delay before every request sounds little bit like bad DNS configuration. Take a look and check if it was properly applied.


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