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I nearly have a VPN working, but I can't get any data through it
by Chris Green 06 Oct '12

06 Oct '12

Well I'm having a wonderful time playing with ideas to access the web server on my eeePc on the boat. My home router is a Draytek Vigor 2820n which has VPN capability itself. So I decided to try it. I can connect using pptp from the eeePc on the boat to the 2820n's VPN service:- root@eeepc:~# pptpsetup --create home --server zbmc.eu --username chris --start Password: Using interface ppp0 Connect: ppp0 <--> /dev/pts/1 CHAP authentication succeeded Cannot determine ethernet address for proxy ARP local IP address 192.168.1.202 remote IP address 192.168.1.1 root@eeepc:~# ... and I can then ping the router from the eeePc OK. However I can't get anything else to work, i.e. I can't seem to get any data across the VPN connection at all. I have tried adding a route at the eeePc end:- root@eeepc:~# route add -net 192.168.1.0 netmask 255.255.255.0 dev ppp0 root@eeepc:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.1 * 255.255.255.255 UH 0 0 0 ppp0 84-45-228-40.st 192.168.13.1 255.255.255.255 UGH 0 0 0 eth0 192.168.1.0 * 255.255.255.0 U 0 0 0 ppp0 192.168.13.0 * 255.255.255.0 U 0 0 0 eth0 default 192.168.13.1 0.0.0.0 UG 100 0 0 eth0 root@eeepc:~# but still no joy. root@eeepc:~# ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. 64 bytes from 192.168.1.1: icmp_seq=1 ttl=255 time=82.0 ms 64 bytes from 192.168.1.1: icmp_seq=2 ttl=255 time=76.7 ms 64 bytes from 192.168.1.1: icmp_seq=3 ttl=255 time=79.6 ms 64 bytes from 192.168.1.1: icmp_seq=4 ttl=255 time=77.8 ms 64 bytes from 192.168.1.1: icmp_seq=5 ttl=255 time=76.6 ms 64 bytes from 192.168.1.1: icmp_seq=6 ttl=255 time=74.9 ms ^C --- 192.168.1.1 ping statistics --- 6 packets transmitted, 6 received, 0% packet loss, time 5007ms rtt min/avg/max/mdev = 74.905/77.992/82.087/2.345 ms root@eeepc:~# ping 192.168.1.4 PING 192.168.1.4 (192.168.1.4) 56(84) bytes of data. From 192.168.1.34 icmp_seq=1 Destination Host Unreachable From 192.168.1.34 icmp_seq=2 Destination Host Unreachable From 192.168.1.34 icmp_seq=3 Destination Host Unreachable From 192.168.1.34 icmp_seq=4 Destination Host Unreachable From 192.168.1.34 icmp_seq=5 Destination Host Unreachable From 192.168.1.34 icmp_seq=6 Destination Host Unreachable ^C --- 192.168.1.4 ping statistics --- 7 packets transmitted, 0 received, +6 errors, 100% packet loss, time 6031ms , pipe 3 (the eeePc is on a 192.168.13.0 LAN so the IP addresses shouldn't conflict) Similarly at the other end (my desktop machine) I can see the VPN but I can't push any data through it:- root@chris:~# arp-scan -l Interface: eth0, datalink type: EN10MB (Ethernet) Starting arp-scan 1.8.1 with 256 hosts (http://www.nta-monitor.com/tools/arp-scan/) 192.168.1.1 00:50:7f:8b:35:40 DrayTek Corp. 192.168.1.2 00:01:6c:6c:c7:9b FOXCONN 192.168.1.6 00:04:4b:07:13:30 NVIDIA 192.168.1.84 70:f1:a1:2d:da:86 Liteon Technology Corporation 192.168.1.90 00:90:a9:70:06:ff WESTERN DIGITAL 192.168.1.122 78:ac:c0:63:90:d4 Hewlett Packard 192.168.1.150 00:04:20:26:55:19 Slim Devices, Inc. 192.168.1.202 00:50:7f:8b:35:40 DrayTek Corp. 192.168.1.81 00:01:e3:9d:8b:b5 Siemens AG 9 packets received by filter, 0 packets dropped by kernel Ending arp-scan 1.8.1: 256 hosts scanned in 1.360 seconds (188.24 hosts/sec). 9 responded That 192.168.1.202 is the VPN network IP address on the router, but I can't ping it or anything:- root@chris:~# ping 192.168.1.202 PING 192.168.1.202 (192.168.1.202) 56(84) bytes of data. ^C --- 192.168.1.202 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3023ms Am I missing something obvious somewhere and/or any ideas how to diagnose what's wrong? -- Chris Green

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Do most/all 'real' SMTP servers follow reasonably retry strategies?
by Chris Green 05 Oct '12

05 Oct '12

As per the subject line, do most SMTP servers (as in systems 'out there' which send me mail) behave reasonably sensibly when my SMTP server is temporarily not functioning? I currently have both a desktop machine *and* a small server machine which are on all the time. It's the server machine that receives my E-Mail. The only reason I have it configured this way is because I'm more likely to rebuild/reconfigure my desktop machine than the server machine and I felt that keeping my SMTP server online consistently was important. However I'm wondering if the effort (and cost) of running two systems all the time is worth it. The other functions of the server system (DNS and CUPS) can easily be run on my desktop machine, occasinal downtime of those services is easily explained to other family members! :-) If real world SMTP servers 'out there' will cope quite happily with my domain's MX machine being AWOL for several hours then I may as well put everything on the one server machine. (Note it's only *my* E-Mail that is delivered by SMTP, all other family members do their own thing as in use Webmail, or IMAP, or whatever) -- Chris Green

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2600 meeting at 18:00 on Friday the 5th October.
by Viperfang 02 Oct '12

02 Oct '12

Quick heads up about this months Norwich 2600 meeting, more info at http://www.norwich2600.co.uk

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WiFi range, what am I likely to get outdoors line-of-sight, without special equipment?
by Chris Green 26 Sep '12

26 Sep '12

The subject says it all really, what sort of range is one likely to get outdoors with WiFi? It's basically line of sight, base station is in a shop, my WiFi router will be sitting in a window maybe 200 meters away. Do I have any chance of it working? -- Chris Green

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Catch 22 situation when disk gets full - how to solve?
by Chris Green 23 Sep '12

23 Sep '12

I have a sort of Catch 22 situation on my little eeePc. It has tried to update kernels automatically and, after a few months (it's on our boat doing monitoring) it has run out of disk space. It still runs OK and I can ssh into it. It has quite a long list of old kernels installed but I can't delete them to make space because it has half an update of the latest kernel:- So when I try and do anything with apt-get I see:- root@eeepc:/var/lib# apt-get remove linux-headers-2.6.32-39 linux-headers-2.6.32-39-generic-pae linux-image-2.6.32-39-generic-pae Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. linux-headers-generic-pae: Depends: linux-headers-2.6.32-43-generic-pae but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). So how do I uninstall all the old headers etc. so that there *is* space to do things? -- Chris Green

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New member to ALUG
by Tarek Amr 23 Sep '12

23 Sep '12

Hello, My name is Tarek, I've just joined ALUG mailing list, and would like to give a brief introduction about myself. I am an Egyptian Linux user since 10 years ago, I have been member of EGLUG (Egyptian Linux User Group), and I just arrived to Norwich to do my masters degree in Computer Science in UEA. I've also worked in the field of computer networks and had good knowledge of C/Python/RoR programming. I'd love to be member of ALUG mailing list and join the groups upcoming meetups and events -- Best Regards Tarek Amr http://www.tarekamr.com/ http://globalvoicesonline.org/author/tarek-amr/

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OT: Maths Jam tomorrow
by Steve Engledow 17 Sep '12

17 Sep '12

Hi folks, Excuse the flagrant abuse of this mailing but I feel the crossover of interest is worth it. The first Norwich Maths Jam (see http://mathsjam.com) begins tomorrow evening (Tuesday 18th) at 7pm in The Reindeer pub on Dereham road; coincidentally a previous haunt of the ALUG pub meet :) If you fancy coming to a pub and being geeky in a mathsy way, come down! Remember kids, beer + geekery -> fun. Steve

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apt-get problems
by Greg Thomas 16 Sep '12

16 Sep '12

I just tried upgrading from Ubuntu 10.04 to 12.04.1 (i.e. from LTS to LTS). It failed. The error message I'm getting is: An unresolvable problem occurred while calculating the upgrade: The package 'update-manager-kde' is marked for removal but it is in the removal blacklist. Google suggests that "apt-get remove update-manager-kde" should fix it [1], but that's giving me the following; Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies. libasound2: Breaks: libasound2-plugins (< 1.0.24) but 1.0.22-0ubuntu6 is to be installed libglib2.0-0: Breaks: gnome-control-center (< 1:3) but 1:2.30.1-0ubuntu2 is to be installed Breaks: gvfs (< 1.8) but 1.6.1-0ubuntu1build1 is to be installed libgnome-keyring0: Breaks: gnome-keyring (< 3.0) but 2.92.92.is.2.30.3-0ubuntu1.1 is to be installed libpango1.0-0: Breaks: plymouth (< 0.8.2-2ubuntu19) but 0.8.2-2ubuntu2.2 is to be installed ppp: Breaks: network-manager (<= 0.8.0.999-1) but 0.8-0ubuntu3.3 is to be installed Breaks: network-manager-pptp (<= 0.8.0.999-1) but 0.8-0ubuntu3 is to be installed E: Broken packages Have I completely hosed my setup, and is a fresh re-install due? Or is there a way around this? Thanks, Greg [1] http://www.hoaglun.com/blog/2011/5/8/ubuntu-1010-1104-upgrade.html

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[ALUG Announce] 3rd Monday Monthly Ipswich Social Meeting : The Mulberry Tree
by samwise 14 Sep '12

14 Sep '12

ALUG Announce Please send announcements to Announce(a)lists.alug.org.uk Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce ----- The monthly "Third Monday" ALUG Ipswich Social Meeting is back this coming Monday, 17th September, at 20:00: The Mulberry Tree 5 Woodbridge Road IPSWICH IP4 2EA Tel: 01473 225776 Map/Directions URI: http://maps.google.co.uk/?q=IP4+2EA WWW: https://www.facebook.com/MULBERRYHOSPITALITY The Mulberry Tree, previously known as The Milestone Beer House, is a grade 2 listed building in the centre of Ipswich. It is located at the intersection between Woodbridge Road and the A1156, across the road from the old Odeon cinema and not far from the Regent Theatre. It re-opened on Thursday March 29th 2012 after a major refurbishment, under its original name of The Mulberry House and has already begun to regain a good reputation for its selection of beers and ales. It has a sizeable car park to the rear of the building. All are welcome, novices and experienced users. Feel free to ask for further information on the Main ALUG mailing list. I'm not going to be able to make this meet as I'm off to Croatia for some sea kayaking off the Dalmation Coast for the next week, so do please post to the list to encourage a bit of interest amongst the regulars. :) I'm eager to hear the report for next time! Peter. ----- Send discussion replies to main(a)lists.alug.org.uk (Reply-To set) Unsub, change settings via http://lists.alug.org.uk/mailman/listinfo/announce

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Re: [ALUG] hi, see it!
by RICHARD FLETCHER 14 Sep '12

14 Sep '12

.. http://nastrani.ic.cz/urworkcap.php?mopage=f9y9

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