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frank_thyes_309's avatar
frank_thyes_309
Icon for Nimbostratus rankNimbostratus
Oct 12, 2012

IP forwarding

Hi Group,   we are migrating from PA address space to our own PI address space. Cooperation partners using domains like this: my.company.partner.com which point to our main IP address i.e 1.1.1.1,...
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frank_thyes_309's avatar
frank_thyes_309
Icon for Nimbostratus rankNimbostratus
Oct 13, 2012
[root@lb2:Active] config curl -v -I http://1.1.1.1 -H "Host: test.abc.com"

 

* About to connect() to 1.1.1.1 port 80

 

* Trying 1.1.1.1... connected

 

* Connected to 1.1.1.1 (1.1.1.1) port 80

 

> HEAD / HTTP/1.1

 

> User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5 OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5

 

> Accept: */*

 

> Host: test.abc.com

 

>

 

* Empty reply from server

 

* Connection 0 to host 1.1.1.1 left intact

 

curl: (52) Empty reply from server

 

* Closing connection 0

 

 

[root@lb2:Active] config tcpdump -nni 0.0:nnn -s0 host 1.1.1.1 or host 2.2.2.2 and port 80

 

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

 

listening on 0.0:nnn, link-type EN10MB (Ethernet), capture size 65535 bytes

 

20:59:12.019359 IP 10.0.35.2.41072 > 2.2.2.2.80: S 3247471255:3247471255(0) win 4380 out slot1/tmm0 lis=vs_1.1.1.1_8 flowtype=128 flowid=13B2F540 peerid=2E4AB5C0 conflags=924 inslot=0 inport=0 haunit=1 peerremote=00000000:00000000:0000FFFF:D4120404 peerlocal=00000000:00000000:0000FFFF:D4120412 remoteport=41072 localport=80 proto=0 vlan=4094

 

20:59:15.019116 IP 10.0.35.2.41072 > 2.2.2.2.80: S 3247471255:3247471255(0) win 4380 out slot1/tmm0 lis=vs_1.1.1.1_8 flowtype=128 flowid=13B2F540 peerid=2E4AB5C0 conflags=924 inslot=0 inport=0 haunit=1 peerremote=00000000:00000000:0000FFFF:D4120404 peerlocal=00000000:00000000:0000FFFF:D4120412 remoteport=41072 localport=80 proto=0 vlan=4094

 

20:59:18.218981 IP 10.0.35.2.41072 > 2.2.2.2.80: S 3247471255:3247471255(0) win 4380 out slot1/tmm0 lis=vs_1.1.1.1_8 flowtype=128 flowid=13B2F540 peerid=2E4AB5C0 conflags=924 inslot=0 inport=0 haunit=1 peerremote=00000000:00000000:0000FFFF:D4120404 peerlocal=00000000:00000000:0000FFFF:D4120412 remoteport=41072 localport=80 proto=0 vlan=4094

 

20:59:21.419283 IP 10.0.35.2.41072 > 2.2.2.2.80: S 3247471255:3247471255(0) win 4380 out slot1/tmm0 lis=vs_1.1.1.1_8 flowtype=128 flowid=13B2F540 peerid=2E4AB5C0 conflags=924 inslot=0 inport=0 haunit=1 peerremote=00000000:00000000:0000FFFF:D4120404 peerlocal=00000000:00000000:0000FFFF:D4120412 remoteport=41072 localport=80 proto=0 vlan=4094

 

 

Looks like the device send the request to the outside host using the wrong interface. I expected 123.123.123.123 instead of the internal address 10.0.35.2