Local Packet Filters

Discussion in 'all things UNIX' started by Searching_ _ _, Jan 21, 2012.

Thread Status:
Not open for further replies.
  1. Searching_ _ _

    Searching_ _ _ Registered Member

    Joined:
    Jan 2, 2008
    Posts:
    1,988
    Location:
    iAnywhere
    Besides iptables are there any other packet filters in Ubuntu?

    I'm trying to run a tool and it says that a local packet filter is blocking it.
    I checked iptables and ufw and don't see any rules loaded.

    What other packet filter could be blocking the tool from running?
     
  2. Ocky

    Ocky Registered Member

    Joined:
    May 6, 2006
    Posts:
    2,710
    Location:
    George, S.Africa
    As a matter of interest what tool are you trying to run ? Maybe you need to reinstall it or reconfigure it ? Eg. hddtemp daemon listens on port 7634 - you can run sudo dpkg-reconfigure <packagename> to answer the config question(s) again.
    What is the full output when you run the tool from terminal ?
     
  3. Searching_ _ _

    Searching_ _ _ Registered Member

    Joined:
    Jan 2, 2008
    Posts:
    1,988
    Location:
    iAnywhere
    Code:
    # lft -E -V -S www.wilderssecurity.com
    Setting my ISN = 583708272
    SEND TTL=0 TSEQ=130600769 FLAGS=1
    SEND TTL=1 TSEQ=1620080557 FLAGS=1
    SEND TTL=2 TSEQ=289367011 FLAGS=1
    SEND TTL=3 TSEQ=1251735866 FLAGS=1
    SEND TTL=4 TSEQ=1100380911 FLAGS=1
    SEND TTL=0 TSEQ=1866407378 FLAGS=1
    SEND TTL=1 TSEQ=591121198 FLAGS=1
    SEND TTL=2 TSEQ=1713968061 FLAGS=1
    SEND TTL=3 TSEQ=694589219 FLAGS=1
    SEND TTL=4 TSEQ=1265003394 FLAGS=1
    SEND TTL=0 TSEQ=1990517898 FLAGS=1
    SEND TTL=1 TSEQ=611538595 FLAGS=1
    SEND TTL=2 TSEQ=1687552254 FLAGS=1
    SEND TTL=3 TSEQ=1151429089 FLAGS=1
    SEND TTL=4 TSEQ=1831270677 FLAGS=1
    SEND TTL=5 TSEQ=418521168 FLAGS=1
    Sending FIRST PACKET for hop 0
    SEND TTL=0 TSEQ=302036237 FLAGS=2
    SEND TTL=6 TSEQ=1031453617 FLAGS=1
    Sending FIRST PACKET for hop 1
    SEND TTL=1 TSEQ=211169829 FLAGS=2
    Sending FIRST PACKET for hop 2
    SEND TTL=2 TSEQ=1914045655 FLAGS=2
    Sending FIRST PACKET for hop 3
    SEND TTL=3 TSEQ=1995602723 FLAGS=2
    Sending FIRST PACKET for hop 4
    SEND TTL=4 TSEQ=1341763911 FLAGS=2
    SEND TTL=5 TSEQ=1692723661 FLAGS=1
    SEND TTL=0 TSEQ=2106428100 FLAGS=2
    SEND TTL=1 TSEQ=368242436 FLAGS=2
    SEND TTL=2 TSEQ=1452553790 FLAGS=2
    SEND TTL=6 TSEQ=741296952 FLAGS=1
    SEND TTL=3 TSEQ=1851461765 FLAGS=2
    SEND TTL=4 TSEQ=632817574 FLAGS=2
    SEND TTL=5 TSEQ=1928458772 FLAGS=1
    SEND TTL=0 TSEQ=287686389 FLAGS=2
    SEND TTL=1 TSEQ=763418343 FLAGS=2
    SEND TTL=2 TSEQ=1401055681 FLAGS=2
    SEND TTL=6 TSEQ=577053400 FLAGS=1
    SEND TTL=3 TSEQ=2015154210 FLAGS=2
    SEND TTL=4 TSEQ=353952945 FLAGS=2
    Sending FIRST PACKET for hop 5
    SEND TTL=5 TSEQ=295977130 FLAGS=2
    SEND TTL=7 TSEQ=458791760 FLAGS=1
    SEND TTL=8 TSEQ=2067921006 FLAGS=1
    Sending FIRST PACKET for hop 6
    SEND TTL=6 TSEQ=990566349 FLAGS=2
    
    
    LFT can't seem to round-trip.  Local packet filter in the way?Concluding with 1 hops.
    
    TTL  LFT trace to wilderssecurity.com (66.227.46.190):80/tcp
    **   [80/tcp failed]  Try alternate options or use -V to see packets.
    There is either a packet filter running or this error occurs for another reason?
    As far as I could determine I found no traditional packet filters running on my system.
     
  4. iceni60

    iceni60 ( ^o^)

    Joined:
    Jun 29, 2004
    Posts:
    5,116
    is it a remote, locate packet filter??

    edit. 80/tcp failed. maybe it's your browser blocking it. but, i don't really know tbh.
     
    Last edited: Jan 23, 2012
  5. Mrkvonic

    Mrkvonic Linux Systems Expert

    Joined:
    May 9, 2005
    Posts:
    9,414
    It is also possible that some routers drop packets. Does not have to be a local problem at all. There could be a million contributing factors, including your ISP. Did you try different computers/distros, with and without your router, different sites, etc.

    Regards,
    Mrk
     
  6. Ocky

    Ocky Registered Member

    Joined:
    May 6, 2006
    Posts:
    2,710
    Location:
    George, S.Africa
    Mtr is quite a useful tool, traceroute and ping combined.

    mtr.png
     
Thread Status:
Not open for further replies.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.