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  • 1.  TCP and UDP Small Servers?

    Posted 09-29-2011 08:36

    TCP and UDP Small Servers were legacy troubleshooting daemons that is an availible configuration on Cisco devices. Is there similar features for juniper devices?

     

    thanks in advance!



  • 2.  RE: TCP and UDP Small Servers?
    Best Answer

    Posted 09-30-2011 04:20

    Hello,

    My guess is that you are looking for JUNOS command equivalent to CSCO IOS command

     

    service udp-small-servers
service tcp-small-servers

     http://www.cisco.com/en/US/products/sw/iosswrel/ps1818/products_tech_note09186a008019d97a.shtml

     

    These "small servers" are working on ports 7,9,13,19 (both TCP and UDP)

     

    aarseniev@m10irouter> file show /etc/services | grep "(^chargen|^echo|^discard|^daytime)" | grep "(tcp|udp)" 
echo              7/tcp
echo              7/udp
discard           9/tcp    sink null
discard           9/udp    sink null
daytime          13/tcp
daytime          13/udp
chargen          19/tcp    ttytst source        #Character Generator
chargen          19/udp    ttytst source        #Character Generator

     These services are disabled by default on every JUNOS router and there is no supported way to enable them.

    You can verify this by using following command and observing the printout, matching on ports 7,9,13,19:

     

    aarseniev@m10irouter> show system connections inet show-routing-instances | grep "(\.7 |\.9 |\.13 |\.19 )"

     

    This command does match on other open ports, for instance on port 179 (BGP):

     

    aarseniev@m10irouter> show system connections inet show-routing-instances | grep "(\.7 |\.9 |\.13 |\.179 )"   
tcp4       0      0  1.1.1.2.179                                   1.1.1.1.54014                                 1                      ESTABLISHED
tcp4       0      0  1.1.1.1.54014                                 1.1.1.2.179                                   default                ESTABLISHED
tcp4       0      0  2.2.2.2.179                                   2.2.2.1.53410                                 2                      ESTABLISHED
tcp4       0      0  2.2.2.1.53410                                 2.2.2.2.179                                   default                ESTABLISHED
tcp46      0      0  *.179                                         *.*                                           default                LISTEN
tcp4       0      0  *.179                                         *.*                                           default                LISTEN

     HTH

    Rgds

    Alex