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Re: IP-Masq. problem



Hi,
Actually, I didnt understand it well. You say that when you are connecting 
to Netvision the IP-Masq is working (=means that the workstations can get 
into the web pages without any problems) and when you're using ActCom you 
can only get loaded webpages from the server and not from the other 
workstations?
You say that you could load webpages after configuring the proxy but it 
says nothing because there is a Cache in your browser.

At 09:34 08/06/01 +0300, you wrote:


>Hi..
>
>You may remember me.. I asked a while ago about ISPs in Israel.  Well, we
>decided to go with Actcom (ADSL connection).  Now I have a interesting
>problem with IP masquerading.  First let me say that everything works fine
>when connected through Netvision (we still have the account with them).
>Only the username/password has changed on the pptp line.  Now, I'm having
>problems getting web pages on the workstations.  (Everything works from
>our server.. the one that actually connects to Actcom).  The strange thing
>is that I can send packets, ping and telnet to external servers seemingly
>without problem.
>
>Attached is a short packet log from the kernel (2.2.13).  Our server has
>IP addresses of 192.168.1.1 and 192.117.108.106, as well as others.  The
>workstation is 192.168.1.4.  The DNS lookup succeeds (yes I know I'm using
>Netvision's DNS), and then 3 or 4 packets are sent to the web server and
>the last one is never responded to.  (Yes these are real IP addresses..
>don't portscan my machine, it will block you.)
>
>Interesting fact: a small web page with a couple lines of text does load.
>Another from the same server (geocities.com) with 1 image also loads, but
>the image doesn't.
>
>Any ideas?  Anyone else have problems with NAT with Actcom?  BTW, I did
>call Actcom support.  They had me configure my browser to use their proxy
>and it helped but I still can't get Actcom's own web page, for example.
>
>Thanks,
>-Cedar
>
>
>-- Attached file included as plaintext by Listar --
>-- File: problem.txt
>
>Jun  7 19:03:12 nanu kernel: Packet log: input - eth0 PROTO=17 
>192.168.1.4:1031 194.90.1.5:53 L=66 S=0x00 I=18155 F=0x0000 T=64 (#4)
>Jun  7 19:03:12 nanu kernel: Packet log: output - ppp0 PROTO=17 
>192.117.108.106:61268 194.90.1.5:53 L=66 S=0x00 I=18155 F=0x0000 T=63 (#3)
>Jun  7 19:03:12 nanu kernel: Packet log: input - ppp0 PROTO=17 
>194.90.1.5:53 192.117.108.106:61268 L=256 S=0x00 I=32184 F=0x4000 T=249 (#3)
>Jun  7 19:03:12 nanu kernel: Packet log: input - eth0 PROTO=6 
>192.168.1.4:1043 192.114.47.83:80 L=60 S=0x00 I=18156 F=0x4000 T=64 SYN (#4)
>Jun  7 19:03:12 nanu kernel: Packet log: output - ppp0 PROTO=6 
>192.117.108.106:61270 192.114.47.83:80 L=60 S=0x00 I=18156 F=0x4000 T=63 
>SYN (#2)
>Jun  7 19:03:12 nanu kernel: Packet log: input - ppp0 PROTO=6 
>192.114.47.83:80 192.117.108.106:61270 L=60 S=0x00 I=34149 F=0x4000 T=62 (#2)
>Jun  7 19:03:12 nanu kernel: Packet log: input - eth0 PROTO=6 
>192.168.1.4:1043 192.114.47.83:80 L=52 S=0x00 I=18157 F=0x4000 T=64 (#4)
>Jun  7 19:03:12 nanu kernel: Packet log: output - ppp0 PROTO=6 
>192.117.108.106:61270 192.114.47.83:80 L=52 S=0x00 I=18157 F=0x4000 T=63 (#2)
>Jun  7 19:03:12 nanu kernel: Packet log: input - eth0 PROTO=6 
>192.168.1.4:1043 192.114.47.83:80 L=383 S=0x00 I=18158 F=0x4000 T=64 (#4)
>Jun  7 19:03:12 nanu kernel: Packet log: output - ppp0 PROTO=6 
>192.117.108.106:61270 192.114.47.83:80 L=383 S=0x00 I=18158 F=0x4000 T=63 (#2)
>Jun  7 19:03:12 nanu kernel: Packet log: input - ppp0 PROTO=6 
>192.114.47.83:80 192.117.108.106:61270 L=52 S=0x00 I=34184 F=0x4000 T=62 (#2)
>Jun  7 19:03:12 nanu kernel: Packet log: input - ppp0 PROTO=6 
>192.114.47.83:80 192.117.108.106:61270 L=641 S=0x00 I=34795 F=0x4000 T=62 (#2)
>Jun  7 19:03:12 nanu kernel: Packet log: input - eth0 PROTO=6 
>192.168.1.4:1043 192.114.47.83:80 L=64 S=0x00 I=18159 F=0x4000 T=64 (#4)
>Jun  7 19:03:12 nanu kernel: Packet log: output - ppp0 PROTO=6 
>192.117.108.106:61270 192.114.47.83:80 L=64 S=0x00 I=18159 F=0x4000 T=63 (#2)
>
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----
Regards,
Eran Levy.
E-mail: eranle@netvision.net.il
WebSite: http://www15.brinkster.com/liloboot


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