Symantec™ Security Gateways Reference Guide - Sawmill

44 Understanding accessNetwork protocolsTable 4-1Supplied protocols with their associated application proxy (Continued)Protocol name Type Port Associated proxyicmp_dest_unreachable ICMP-based --- Pingicmp_echo_reply ICMP-based --- Pingicmp_echo_request ICMP-based --- Pingicmp_src_quench ICMP-based --- Pingicmp_time_exceeded ICMP-based --- Pinglogin TCP/UDP-based 513 RCMDnetbios_138_udp TCP/UDP-based 138 NBDGRAMnetbios_139_tcp TCP/UDP-based 139 CIFSnntp TCP/UDP-based 119 NNTPntp TCP/UDP-based 123 NTPping IP-based --- Pingrealaudio TCP/UDP-based 7070 RealAudiorealaudio_proxy TCP/UDP-based 1090 RealAudiorealaudio_udp TCP/UDP-based 6970 RealAudiortsp TCP/UDP-based 554 RTSPshell TCP/UDP-based 514 RCMDsmb TCP/UDP-based 445 CIFSsmtp TCP/UDP-based 25 SMTPtelnet TCP/UDP-based 23 TelnetProtocols without a proxyThese protocols represent services less commonly used in an IP network. Each standard protocol is defined,but is not associated with an application-specific proxy. Table 4-2 shows a complete list of suppliedprotocols that have no associated application proxy.Table 4-2Supplied protocols with no associated application proxyProtocol name Type PortAH IP-based ---AIM TCP/UDP-based 5190auth TCP/UDP-based 113bftp TCP/UDP-based 152bgp TCP/UDP-based 179biff TCP/UDP-based 512biff_rev TCP/UDP-based 1024chargen_tcp TCP/UDP-based 19chargen_udp TCP/UDP-based 19