[CentOS] Problem with ATT VPN
I'm running a CentOS-5.6 server, which in general runs perfectly. My setting is possibly a little unusual: ADSL - Billion 5200S RC modem/router - CentOS-5.6 HP MicroServer - Linksys WRT54GL router . My daughter is just visiting me, and she has to contact her job using ATT VPN on her laptop under Windows XP. Unfortunately this does not work on my system when connected to the Linksys router by WiFi or ethernet. More precisely, the IBM Lotus sametime application does not work, and she cannot access the IBM Intranet homepage which she needs to use company tools and applications. It works perfectly at a public WiFi site nearby. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with ATT VPN
- Original Message - I'm running a CentOS-5.6 server, which in general runs perfectly. My setting is possibly a little unusual: ADSL - Billion 5200S RC modem/router - CentOS-5.6 HP MicroServer - Linksys WRT54GL router . My daughter is just visiting me, and she has to contact her job using ATT VPN on her laptop under Windows XP. Unfortunately this does not work on my system when connected to the Linksys router by WiFi or ethernet. More precisely, the IBM Lotus sametime application does not work, and she cannot access the IBM Intranet homepage which she needs to use company tools and applications. It works perfectly at a public WiFi site nearby. When VPN problems arise with specific applications, always look at MTU as a possible culprit. --Tim ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with ATT VPN
I am not sure it's related to centos that much, when it comes to port forwarding, if you might use iptables correctly with several NIC(s), if you can create a vlan with your linksys, like they talk about here: http://www.dd-wrt.com/phpBB2/viewtopic.php?p=4692 I would configure a DMZ pool for the laptop usage only, and forward the needed ports correctly towards the end user Network port. this might help you also for your centos iptables configuration : http://www.howtoforge.com/nat_iptables On Wed, Jul 13, 2011 at 11:41 PM, m.r...@5-cent.us wrote: Timothy Murphy wrote: I'm running a CentOS-5.6 server, which in general runs perfectly. My setting is possibly a little unusual: ADSL - Billion 5200S RC modem/router - CentOS-5.6 HP MicroServer - Linksys WRT54GL router . My daughter is just visiting me, and she has to contact her job using ATT VPN on her laptop under Windows XP. Unfortunately this does not work on my system when connected to the Linksys router by WiFi or ethernet. More precisely, the IBM Lotus sametime application does not work, and she cannot access the IBM Intranet homepage which she needs to use company tools and applications. snip You may have a port closed that, um, damn, it's only been 3 years since I was using that client, and I can't remember the name, anyway, that it uses. mark ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos -- Best Regards, Yonatan Pingle RHCT | RHCSA | CCNA1 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with ATT VPN
yonatan pingle wrote: Thanks for your response. I am not sure it's related to centos that much, when it comes to port forwarding, if you might use iptables correctly with several NIC(s), I should have said that I am using shorewall, which seems to work perfectly for my purposes. if you can create a vlan with your linksys, like they talk about here: http://www.dd-wrt.com/phpBB2/viewtopic.php?p=4692 I'm not really clear if there is any difference between vlan and vpn. In any case I am running OpenVPN on the server linking computers in 2 countries, and this seems to work perfectly. One obvious possibility is that the IBM Lotus sametime program that is not working properly requires some port to be open; but I haven't been able to work out which port, if that is indeed the cause of the problem. -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with ATT VPN
Tim Nelson wrote: When VPN problems arise with specific applications, always look at MTU as a possible culprit. Thanks for the suggestion. I should say that I am running OpenVPN on my system with no problem at all. Also the ATT VPN apears to be running fine; it is just the sametime program running over VPN which is not working properly. Incidentally, what would you suggest as a possible MTU value? And what is the simplest way to change the MTU on a CentOS server? -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] Problem with ATT VPN
On Wed, Jul 13, 2011 at 6:33 PM, Timothy Murphy gayle...@eircom.net wrote: Tim Nelson wrote: When VPN problems arise with specific applications, always look at MTU as a possible culprit. Thanks for the suggestion. I should say that I am running OpenVPN on my system with no problem at all. Also the ATT VPN apears to be running fine; it is just the sametime program running over VPN which is not working properly. Incidentally, what would you suggest as a possible MTU value? And what is the simplest way to change the MTU on a CentOS server? -- Timothy Murphy e-mail: gayleard /at/ eircom.net tel: +353-86-2336090, +353-1-2842366 s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos I have only run Windows through the home routers. If I recall correctly (bad memory sometimes), I had to open port 500 (isakmp) for IPSEC to work. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
