| 1 |
On 11 May 2010 08:39, Norman Rieß <norman@×××××××××.org> wrote: |
| 2 |
> Am 05/11/10 08:54, schrieb Grant: |
| 3 |
>>>> |
| 4 |
>>>> I nmap'ed one of my remote Gentoo servers today and besides the |
| 5 |
>>>> expected open ports were these: |
| 6 |
>>>> |
| 7 |
>>>> 1080/tcp open socks |
| 8 |
>>>> 3128/tcp open squid-http |
| 9 |
>>>> 8080/tcp open http-proxy |
| 10 |
>>>> |
| 11 |
>>>> I'm not running any sort of proxy software that I know of and I should |
| 12 |
>>>> be the only person whatsoever with access to the machine. 'netstat |
| 13 |
>>>> -l' doesn't show any info on those ports at all so I suppose it's been |
| 14 |
>>>> hacked as well? I installed and ran 'rkhunter --check' (what happened |
| 15 |
>>>> to the chrootkit ebuild?) but it doesn't seem to be much use since I |
| 16 |
>>>> hadn't established a "file of stored file properties". |
| 17 |
>>>> |
| 18 |
>>>> What do you guys think is going on? What should I do from here? |
| 19 |
>>>> |
| 20 |
>>> |
| 21 |
>>> What does lsof (I'd reinstall it afresh) show with regards to strange |
| 22 |
>>> users? |
| 23 |
>>> What users the above services run under. If indeed they are not |
| 24 |
>>> legitimate |
| 25 |
>>> and you confirm that they are not being run as packages that you |
| 26 |
>>> installed, |
| 27 |
>>> then I'm afraid the only sane option is to reinstall. |
| 28 |
>>> |
| 29 |
>> |
| 30 |
>> Wow. I'm actually seeing the same thing from other domains I nmap. |
| 31 |
>> Could my ISP have some kind of a weird environment set up that makes |
| 32 |
>> it look like there are ports such as these open on remote systems? |
| 33 |
>> Right now I'm on some kind of a shared connection where everyone has |
| 34 |
>> their own modem or router or whatever it is, but I think everyone's IP |
| 35 |
>> is the same. |
| 36 |
>> |
| 37 |
>> - Grant |
| 38 |
>> |
| 39 |
>> |
| 40 |
> |
| 41 |
> Hello, |
| 42 |
> |
| 43 |
> looks like, your ISP has a Transparent Proxy Setup running. |
| 44 |
|
| 45 |
Ports being shown as open does not mean that your machine is |
| 46 |
listening, more like the firewall has some holes in it. If the |
| 47 |
firewall is not configured/running on your server itself, then you may |
| 48 |
be alright. Can you actually connect to your server using those |
| 49 |
ports? |
| 50 |
|
| 51 |
Have you tried telnet, or nc -v -z <your_host_name> <port> to see if |
| 52 |
they are open? |
| 53 |
|
| 54 |
If the above as well as lsof show nothing, can you nmap your machine |
| 55 |
from within the LAN that it is hosted in? |
| 56 |
|
| 57 |
HTH. |
| 58 |
-- |
| 59 |
Regards, |
| 60 |
Mick |
Archives