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Old 10-26-2005, 12:02 PM   #1
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Registered: Oct 2005
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Cisco VPN Client installation error

I have a problem installing the Cisco VPN client. I am running Debian with the 2.6.12 kernel. When I run ./vpn_install, I get this error message:

In file included from /lib/modules/,
                 from /lib/modules/,
                 from frag.c:11:
/lib/modules/ In function 'skb_add_data':
/lib/modules/ warning: pointer targets in passing argument 1 of 'csum_and_copy_from_user' differ in signedness
In file included from /lib/modules/,
                 from /lib/modules/,
                 from frag.c:16:
/lib/modules/ In function 'skb_copy_to_page':
/lib/modules/ warning: pointer targets in passing argument 1 of 'csum_and_copy_from_user' differ in signedness
ld: frag.o: No such file: No such file or directory
Failed to make module "cisco_ipsec"
I found one other site that seems to talk about this issue, but its in German...

Anyone else have this problem or know how to fix it?
Old 10-27-2005, 05:55 AM   #2
Senior Member
Registered: Jul 2004
Location: Lower Rhine region, Germany
Distribution: Slackware 14.1 (32 and 64 bit)
Posts: 1,594

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Hi, I suppose you meant the german site The conclusion there is to not use the original Cisco VPN client but to use vpnc.
The post from tobi_w seems to be fine for you, I hope:


I'm using vpnc as Cisco client.
It is run completely in user space and doesn't require a kernel module, unlike Cisco client.
Install it by running "apt-get install vpnc"

You just have to edit /etc/vpnc.conf:
Interface name vpnlink
IPSec gateway xx.xx.xx.xx
Xauth username USERNAME
Xauth password PASSWD

Be sure you don't have space characters at the end of the lines.
Connect with "vpnc-connect" and disconnect with "vpnc-disconnect".



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