FTP very slow in LAN, "fast" from WAN-> Firewall problem?

Discussion in 'Server Operation' started by Pasco, Aug 22, 2005.

  1. Pasco

    Pasco Member

    Hi 2gether,

    I have a strange problem with FTP. If I access my (ISPConfig)Server from outside, that means from the WAN, it runs normaly (I guess this is normal speed at least...Even though it could be much faster..). But if I access it via LAN it's veeery very slow. It must be some network/firewall issue.

    Has anyone any clue?

    BTW: my ISPConfig-Server is in the DMZ and therefore my LAN client is in a different subnet..but there should be no restrictions vom the LAN->DMZ from the firewall. I have disabled the ISPConfig firewall too.

    So I don't know where's the problem actually..

    Any help would be greatly appreciated, thx in advance,
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    Have you disabled DNS-Lookups in your proftpd.conf?
  3. Pasco

    Pasco Member

    No not yet :) But I'll do now so..
  4. Pasco

    Pasco Member

    Oh, I've already had disabled DNS look-ups actually...so do you have any other ideas? ;-)
  5. falko

    falko Super Moderator Howtoforge Staff

    Have you tried to use "Passive Transfers" in your FTP client? Normally that helps. :)
  6. Pasco

    Pasco Member

    Nice info, thanks :D . No it's a looot faster! So it's some kind of firewall issue, I think...

    I have about 4-5 MB/s on my 100 Mbit/s Network (LAN) now...I think that's normal...

    (I've read some trick somewhere to bring it near to the "theory" of 100 MBit/s or 12.5 MBytes/s, but that's a long time ago, don't know the link anymore. It depends also on the nic, duplex-mode etc. I guess)

    Thx so much, the main problem is solved! ;-)

    GrZ, p@sco
  7. HoUsECAt

    HoUsECAt New Member

    a little off topic... but on my LAN at home i get around 10mbyte/s .... but it depends on your type router, configuration of servers and cable length ;)

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